stunnel-users July 2022

stunnel-users@stunnel.org

7 participants
9 discussions

Requests to cloud server that requires host header
by Lorne Kates 13 Nov '24

13 Nov '24

(related to Akamai message from before-- but I have better troubleshooting information). I'm tying to route traffic through stunnel to a "cloud" based-endpoint. That endpoint has a static server name-- test.authorize.net. (This is the dev sandbox for auth.net). But if you do an nslookup on test.authorize.net, you'll get back a different servername and IP, because it's so wonderfully "cloud". Stunnel apparently tries to connect to the nslookup value. The server rejects the request because it can't route it back to test.authorize.net. I've tried adding "delay = yes" and "sni = test.authorize.net", but neither work. To see this in action, a simple setup with any accept, then connect to test.authorize.net:443 in client = yes mode. This is what a valid response looks like (13 -- give me the darn merchant ID in a POST): https://test.authorize.net/gateway/transact.dll This is what you'll get if you try to use stunnel (400 invalid url) : https://23.195.204.150/gateway/transact.dll So how can I get stunnel to send the proper Request Header (host: test.authorize.net), make sure it's using http/1.1, etc?

4 3

Re: [stunnel-users] CPU 100%
by Eric Eberhard 06 Nov '24

06 Nov '24

Long ago I had a server with a bad network card. Every once in a while it would spew uncontrollable bytes onto the network. If you open a stunnel connection and it does that this could very well be the problem. If it cheap, try changing the network card. If not, you should be able to look in your firewall/router and it will tell you who is sending what bytes to whomever. See if that machine is indeed streaming the bytes in massive quantities. If not, I would suspect your stunnel is getting stuck in it's own loop. There are a million reasons this can happen (well a few less than a million) - such as maybe a bad library in the FreeBSD or a bad choice in the Makefile - such as doing threads or something in a way your O/S does not like (I use threads=fork or whatever it is, instead of actual threading). You might tinker with some of the options that make the stunnel build and try different ones. Especially if stunnel was compiled on a different version of the O/S - could be differences in bytes in things and who knows what. That is all I can suggest beyond setting the debug level to 7 (I think is highest) and then watching the log file. Eric From: stunnel-users [mailto:stunnel-users-bounces@stunnel.org] On Behalf Of Murrey, Brian J. Sent: Wednesday, October 17, 2018 10:57 AM To: stunnel-users(a)stunnel.org Subject: [stunnel-users] CPU 100% We are running stunnel 5.49 on FreeBSD 11.2 and we're running into a problem once in a while. CPU pegs at 100% when we get an stunnel connection from one of our external devices. This affects 100% of all cores and we can't even log in to console. To mitigate this temporarily, we have a script running in the background to watch when stunnel begins to spike and restarts the daemon. It doesn't happen 100% of the time, and so far I have been unable to distinguish what makes the connection do this to the CPU. Have any of you run in to this issue? Sincerely, Brian Murrey System Engineer II, IT Infrastructure _____ NOTICE: This message may contain privileged and confidential information and/or protected health information intended solely for the use of the named recipient and may be privileged or otherwise protected by law. If you are not the intended recipient of this message, you should immediately notify the sender and delete this message. Do not disseminate, reproduce, or review this message or attachments if you are not the intended recipient. The sender or others may have legal rights restricting the dissemination of the information contained in this message and, as a result, remedies against you in the event of the improper dissemination of confidential information, trade secrets, personal information or privileged communications. This message is the work of the sender and does not necessarily reflect the position, views, or policies of TriMedx LLC or its affiliates. WARNING: The integrity and security of this message cannot be guaranteed and may contain or transmit a virus or other illicit code. Neither TriMedx LLC or its affiliates accept liability for any damage attributable to viruses or illicit code transmitted through this message or an attachment.

2 1

older browsers, stunnel and privoxy
by kovacs janos 04 Mar '24

04 Mar '24

sorry to bother, im trying to make older browsers be able to display TLS 1.1 and TLS 1.2 sites. i heard stunnel cant be configured to always forward to the current site address dynamically, thats why i would use privoxy. the browser is configured to send to: 127.0.0.1 443 stunnel config has this at the end: [Tunnel_in] client = yes accept = 127.0.0.1:443 connect = 127.0.0.1:8118 verifyChain = yes CAfile = ca-certs.pem checkHost = localhost 127.0.0.1:8118 is the privoxy address. this is what stunnel writes: LOG5[main]: Configuration successful LOG5[0]: Service [Tunnel_in] accepted connection from 127.0.0.1:3261 LOG5[0]: s_connect: connected 127.0.0.1:8118 LOG5[0]: Service [Tunnel_in] connected remote server from 127.0.0.1:3262 and the browser infinitely loads, and never loads anything or leaves the page. if i remove the last 3 lines, its the same just with this line added: LOG4[main]: Service [Tunnel_in] needs authentication to prevent MITM attacks but it doesnt give an error or anything. with a configuration like: [Tunnel_out] client = no accept = 127.0.0.1:443 connect = 127.0.0.1:8118 cert = stunnel.pem this is what it gives: LOG5[3]: Service [Tunnel_out] accepted connection from 127.0.0.1:3294 LOG3[3]: SSL_accept: 1407609B: error:1407609B:SSL routines:SSL23_GET_CLIENT_HELLO:https proxy request LOG5[3]: Connection reset: 0 byte(s) sent to TLS, 0 byte(s) sent to socket and browser gives a server not found error immediately. im not even sure if i should use client or server configuration in a case like this, but none of them works anyway. all i would need is for my browser to get the pages decrypted, or at least in less than TLS1.1. like how on newipnow.com i can access sites with any encryption, since they are sent to the browser without encryption. the browser just gives an "unencrypted tunnel" warning, which is how i found stunnel, and which is exactly what i need, just locally.

8 41

TPM based mutual tls authentication
by Nyiri, Gabor (Nokia - HU/Budapest) 07 Nov '23

07 Nov '23

Hi, Can you help me how to configure stunnel client to use TPM for mutual TLS authentication? I want to connect with mTLS to a remote server then make this connection available for localhost without mTLS. Thanks for your help in advance! Here is my configuration so far without TPM: debug = debug output = /tmp/stunnel.log foreground = yes [mtls_client] client = yes accept = 127.0.0.1:12019 sni = server-with-mtls.example.com checkHost = server-with-mtls.example.com connect = 1.2.3.4:443 verifyChain = yes CApath = /etc/ssl/certs/ cert = client.crt key = client.key Thanks & br, Gábor Nyíri,

2 1

TLS alert (write): fatal: decode error (pop3 to office365)
by m.strunk＠mulderconnect.nl 26 Jul '22

26 Jul '22

We now use stunnel as a solution for a pop3 import for Office365. It just stopped working since Wednesday. we have done a new installation on this, only now we run into these problems that it no longer wants to connect. Below you will find our debug list and config list. Do any of you have a solution to this problem? Debug: 2022.07.26 14:34:37 LOG6[service]: Service [POP3 Incoming] (FD=876) bound to 0.0.0.0:110 2022.07.26 14:34:37 LOG6[service]: Service [SMTP Outgoing] (FD=840) bound to 0.0.0.0:25 2022.07.26 14:34:54 LOG5[21]: Service [POP3 Incoming] accepted connection from 192.168.110.11:60494 2022.07.26 14:34:54 LOG6[21]: Peer certificate not required 2022.07.26 14:35:24 LOG3[21]: SSL_accept: ssl/record/rec_layer_s3.c:308: error:0A000126:SSL routines::unexpected eof while reading 2022.07.26 14:35:24 LOG5[21]: Connection reset: 0 byte(s) sent to TLS, 0 byte(s) sent to socket 2022.07.26 14:35:24 LOG4[21]: Possible memory leak at crypto/asn1/asn1_lib.c:308: 87315 allocations 2022.07.26 14:35:24 LOG4[21]: Possible memory leak at crypto/asn1/tasn_new.c:136: 77533 allocations 2022.07.26 14:35:24 LOG4[21]: Possible memory leak at crypto/asn1/asn1_lib.c:350: 70711 allocations 2022.07.26 14:37:21 LOG6[service]: Initializing inetd mode configuration 2022.07.26 14:37:21 LOG5[service]: Reading configuration from file C:\Program Files (x86)\stunnel\config\stunnel.conf 2022.07.26 14:37:21 LOG5[service]: UTF-8 byte order mark detected 2022.07.26 14:37:21 LOG5[service]: FIPS mode disabled 2022.07.26 14:37:21 LOG6[service]: Compression enabled: 0 methods 2022.07.26 14:37:21 LOG6[service]: Initializing service [POP3 Incoming] 2022.07.26 14:37:21 LOG6[service]: User-specified security level set: 0 2022.07.26 14:37:21 LOG6[service]: Session resumption enabled 2022.07.26 14:37:21 LOG6[service]: Loading certificate from file: stunnel.pem 2022.07.26 14:37:21 LOG6[service]: Certificate loaded from file: stunnel.pem 2022.07.26 14:37:21 LOG6[service]: Loading private key from file: stunnel.pem 2022.07.26 14:37:21 LOG6[service]: Private key loaded from file: stunnel.pem 2022.07.26 14:37:21 LOG6[service]: Client CA: C=BE, O=GlobalSign nv-sa, OU=Root CA, CN=GlobalSign Root CA 2022.07.26 14:37:21 LOG6[service]: Client CA: OU=GlobalSign Root CA - R2, O=GlobalSign, CN=GlobalSign 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O="VeriSign, Inc.", OU=VeriSign Trust Network, OU="(c) 1999 VeriSign, Inc. - For authorized use only", CN=VeriSign Class 3 Public Primary Certification Authority - G3 2022.07.26 14:37:21 LOG6[service]: Client CA: O=Entrust.net, OU=www.entrust.net/CPS_2048 incorp. by ref. (limits liab.), OU=(c) 1999 Entrust.net Limited, CN=Entrust.net Certification Authority (2048) 2022.07.26 14:37:21 LOG6[service]: Client CA: C=IE, O=Baltimore, OU=CyberTrust, CN=Baltimore CyberTrust Root 2022.07.26 14:37:21 LOG6[service]: Client CA: C=SE, O=AddTrust AB, OU=AddTrust External TTP Network, CN=AddTrust External CA Root 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O="Entrust, Inc.", OU=www.entrust.net/CPS is incorporated by reference, OU="(c) 2006 Entrust, Inc.", CN=Entrust Root Certification Authority 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=GeoTrust Inc., CN=GeoTrust Global CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=GeoTrust Inc., CN=GeoTrust Universal CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=GeoTrust Inc., CN=GeoTrust Universal CA 2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=VISA, OU=Visa International Service Association, CN=Visa eCommerce Root 2022.07.26 14:37:21 LOG6[service]: Client CA: C=PL, O=Unizeto Sp. z o.o., CN=Certum CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=GB, ST=Greater Manchester, L=Salford, O=Comodo CA Limited, CN=AAA Certificate Services 2022.07.26 14:37:21 LOG6[service]: Client CA: C=BM, O=QuoVadis Limited, OU=Root Certification Authority, CN=QuoVadis Root Certification Authority 2022.07.26 14:37:21 LOG6[service]: Client CA: C=BM, O=QuoVadis Limited, CN=QuoVadis Root CA 2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=BM, O=QuoVadis Limited, CN=QuoVadis Root CA 3 2022.07.26 14:37:21 LOG6[service]: Client CA: C=JP, O=SECOM Trust.net, OU=Security Communication RootCA1 2022.07.26 14:37:21 LOG6[service]: Client CA: C=FI, O=Sonera, CN=Sonera Class2 CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=EU, O=AC Camerfirma SA CIF A82743287, OU=http://www.chambersign.org, CN=Chambers of Commerce Root 2022.07.26 14:37:21 LOG6[service]: Client CA: C=EU, O=AC Camerfirma SA CIF A82743287, OU=http://www.chambersign.org, CN=Global Chambersign Root 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, OU=www.xrampsecurity.com, O=XRamp Security Services Inc, CN=XRamp Global Certification Authority 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O="The Go Daddy Group, Inc.", OU=Go Daddy Class 2 Certification Authority 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O="Starfield Technologies, Inc.", OU=Starfield Class 2 Certification Authority 2022.07.26 14:37:21 LOG6[service]: Client CA: C=IL, O=StartCom Ltd., OU=Secure Digital Certificate Signing, CN=StartCom Certification Authority 2022.07.26 14:37:21 LOG6[service]: Client CA: C=TW, O=Government Root Certification Authority 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Assured ID Root CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Global Root CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert High Assurance EV Root CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=FR, O=Certplus, CN=Class 2 Primary CA 2022.07.26 14:37:21 LOG6[service]: Client CA: O=Digital Signature Trust Co., CN=DST Root CA X3 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=Digital Signature Trust, OU=DST ACES, CN=DST ACES CA X6 2022.07.26 14:37:21 LOG6[service]: Client CA: C=CH, O=SwissSign AG, CN=SwissSign Gold CA - G2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=CH, O=SwissSign AG, CN=SwissSign Silver CA - G2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=GeoTrust Inc., CN=GeoTrust Primary Certification Authority 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O="thawte, Inc.", OU=Certification Services Division, OU="(c) 2006 thawte, Inc. - For authorized use only", CN=thawte Primary Root CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O="VeriSign, Inc.", OU=VeriSign Trust Network, OU="(c) 2006 VeriSign, Inc. - For authorized use only", CN=VeriSign Class 3 Public Primary Certification Authority - G5 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=SecureTrust Corporation, CN=SecureTrust CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=SecureTrust Corporation, CN=Secure Global CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO Certification Authority 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=Network Solutions L.L.C., CN=Network Solutions Certificate Authority 2022.07.26 14:37:21 LOG6[service]: Client CA: C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO ECC Certification Authority 2022.07.26 14:37:21 LOG6[service]: Client CA: C=JP, O="SECOM Trust Systems CO.,LTD.", OU=Security Communication EV RootCA1 2022.07.26 14:37:21 LOG6[service]: Client CA: C=CH, O=WISeKey, OU=Copyright (c) 2005, OU=OISTE Foundation Endorsed, CN=OISTE WISeKey Global Root GA CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=FR, O=Dhimyotis, CN=Certigna 2022.07.26 14:37:21 LOG6[service]: Client CA: C=DE, O=Deutsche Telekom AG, OU=T-TeleSec Trust Center, CN=Deutsche Telekom Root CA 2 2022.07.26 14:37:21 LOG6[service]: Client CA: O="Cybertrust, Inc", CN=Cybertrust Global Root 2022.07.26 14:37:21 LOG6[service]: Client CA: C=TW, O="Chunghwa Telecom Co., Ltd.", OU=ePKI Root Certification Authority 2022.07.26 14:37:21 LOG6[service]: Client CA: C=RO, O=certSIGN, OU=certSIGN ROOT CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=GeoTrust Inc., OU=(c) 2008 GeoTrust Inc. - For authorized use only, CN=GeoTrust Primary Certification Authority - G3 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O="thawte, Inc.", OU="(c) 2007 thawte, Inc. - For authorized use only", CN=thawte Primary Root CA - G2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O="thawte, Inc.", OU=Certification Services Division, OU="(c) 2008 thawte, Inc. - For authorized use only", CN=thawte Primary Root CA - G3 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=GeoTrust Inc., OU=(c) 2007 GeoTrust Inc. - For authorized use only, CN=GeoTrust Primary Certification Authority - G2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O="VeriSign, Inc.", OU=VeriSign Trust Network, OU="(c) 2008 VeriSign, Inc. - For authorized use only", CN=VeriSign Universal Root Certification Authority 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O="VeriSign, Inc.", OU=VeriSign Trust Network, OU="(c) 2007 VeriSign, Inc. - For authorized use only", CN=VeriSign Class 3 Public Primary Certification Authority - G4 2022.07.26 14:37:21 LOG6[service]: Client CA: C=HU, L=Budapest, O=NetLock Kft., OU=Tanúsítványkiadók (Certification Services), CN=NetLock Arany (Class Gold) Főtanúsítvány 2022.07.26 14:37:21 LOG6[service]: Client CA: C=NL, O=Staat der Nederlanden, CN=Staat der Nederlanden Root CA - G2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=HK, O=Hongkong Post, CN=Hongkong Post Root CA 1 2022.07.26 14:37:21 LOG6[service]: Client CA: C=JP, O="Japan Certification Services, Inc.", CN=SecureSign RootCA11 2022.07.26 14:37:21 LOG6[service]: Client CA: CN=ACEDICOM Root, OU=PKI, O=EDICOM, C=ES 2022.07.26 14:37:21 LOG6[service]: Client CA: C=HU, L=Budapest, O=Microsec Ltd., CN=Microsec e-Szigno Root CA 2009, emailAddress=info(a)e-szigno.hu 2022.07.26 14:37:21 LOG6[service]: Client CA: OU=GlobalSign Root CA - R3, O=GlobalSign, CN=GlobalSign 2022.07.26 14:37:21 LOG6[service]: Client CA: C=ES, CN=Autoridad de Certificacion Firmaprofesional CIF A62634068 2022.07.26 14:37:21 LOG6[service]: Client CA: C=ES, O=IZENPE S.A., CN=Izenpe.com 2022.07.26 14:37:21 LOG6[service]: Client CA: C=EU, L=Madrid (see current address at www.camerfirma.com/address), serialNumber=A82743287, O=AC Camerfirma S.A., CN=Chambers of Commerce Root - 2008 2022.07.26 14:37:21 LOG6[service]: Client CA: C=EU, L=Madrid (see current address at www.camerfirma.com/address), serialNumber=A82743287, O=AC Camerfirma S.A., CN=Global Chambersign Root - 2008 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, ST=Arizona, L=Scottsdale, O="GoDaddy.com, Inc.", CN=Go Daddy Root Certificate Authority - G2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, ST=Arizona, L=Scottsdale, O="Starfield Technologies, Inc.", CN=Starfield Root Certificate Authority - G2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, ST=Arizona, L=Scottsdale, O="Starfield Technologies, Inc.", CN=Starfield Services Root Certificate Authority - G2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=AffirmTrust, CN=AffirmTrust Commercial 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=AffirmTrust, CN=AffirmTrust Networking 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=AffirmTrust, CN=AffirmTrust Premium 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=AffirmTrust, CN=AffirmTrust Premium ECC 2022.07.26 14:37:21 LOG6[service]: Client CA: C=PL, O=Unizeto Technologies S.A., OU=Certum Certification Authority, CN=Certum Trusted Network CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=FR, O=Certinomis, OU=0002 433998903, CN=Certinomis - Autorité Racine 2022.07.26 14:37:21 LOG6[service]: Client CA: C=TW, O=TAIWAN-CA, OU=Root CA, CN=TWCA Root Certification Authority 2022.07.26 14:37:21 LOG6[service]: Client CA: C=JP, O="SECOM Trust Systems CO.,LTD.", OU=Security Communication RootCA2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=ES, O=Agencia Catalana de Certificacio (NIF Q-0801176-I), OU=Serveis Publics de Certificacio, OU=Vegeu https://www.catcert.net/verarrel (c)03, OU=Jerarquia Entitats de Certificacio Catalanes, CN=EC-ACC 2022.07.26 14:37:21 LOG6[service]: Client CA: C=GR, O=Hellenic Academic and Research Institutions Cert. Authority, CN=Hellenic Academic and Research Institutions RootCA 2011 2022.07.26 14:37:21 LOG6[service]: Client CA: C=IT, L=Milan, O=Actalis S.p.A./03358520967, CN=Actalis Authentication Root CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=GB, O=Trustis Limited, OU=Trustis FPS Root CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=IL, O=StartCom Ltd., CN=StartCom Certification Authority G2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=NO, O=Buypass AS-983163327, CN=Buypass Class 2 Root CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=NO, O=Buypass AS-983163327, CN=Buypass Class 3 Root CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=DE, O=T-Systems Enterprise Services GmbH, OU=T-Systems Trust Center, CN=T-TeleSec GlobalRoot Class 3 2022.07.26 14:37:21 LOG6[service]: Client CA: C=EE, O=AS Sertifitseerimiskeskus, CN=EE Certification Centre Root CA, emailAddress=pki(a)sk.ee 2022.07.26 14:37:21 LOG6[service]: Client CA: CN=TÜRKTRUST Elektronik Sertifika Hizmet Sağlayıcısı, C=TR, L=Ankara, O=TÜRKTRUST Bilgi İletişim ve Bilişim Güvenliği Hizmetleri A.Ş. (c) Aralık 2007 2022.07.26 14:37:21 LOG6[service]: Client CA: C=DE, O=D-Trust GmbH, CN=D-TRUST Root Class 3 CA 2 2009 2022.07.26 14:37:21 LOG6[service]: Client CA: C=DE, O=D-Trust GmbH, CN=D-TRUST Root Class 3 CA 2 EV 2009 2022.07.26 14:37:21 LOG6[service]: Client CA: emailAddress=contacto(a)procert.net.ve, L=Chacao, ST=Miranda, OU=Proveedor de Certificados PROCERT, O=Sistema Nacional de Certificacion Electronica, C=VE, CN=PSCProcert 2022.07.26 14:37:21 LOG6[service]: Client CA: C=SK, L=Bratislava, O=Disig a.s., CN=CA Disig Root R1 2022.07.26 14:37:21 LOG6[service]: Client CA: C=SK, L=Bratislava, O=Disig a.s., CN=CA Disig Root R2 2022.07.26 14:37:21 LOG6[service]: Client CA: CN=ACCVRAIZ1, OU=PKIACCV, O=ACCV, C=ES 2022.07.26 14:37:21 LOG6[service]: Client CA: C=TW, O=TAIWAN-CA, OU=Root CA, CN=TWCA Global Root CA 2022.07.26 14:37:21 LOG6[service]: Client CA: O=TeliaSonera, CN=TeliaSonera Root CA v1 2022.07.26 14:37:21 LOG6[service]: Client CA: C=TR, L=Ankara, O=E-Tuğra EBG Bilişim Teknolojileri ve Hizmetleri A.Ş., OU=E-Tugra Sertifikasyon Merkezi, CN=E-Tugra Certification Authority 2022.07.26 14:37:21 LOG6[service]: Client CA: C=DE, O=T-Systems Enterprise Services GmbH, OU=T-Systems Trust Center, CN=T-TeleSec GlobalRoot Class 2 2022.07.26 14:37:21 LOG6[service]: Client CA: CN=Atos TrustedRoot 2011, O=Atos, C=DE 2022.07.26 14:37:21 LOG6[service]: Client CA: C=BM, O=QuoVadis Limited, CN=QuoVadis Root CA 1 G3 2022.07.26 14:37:21 LOG6[service]: Client CA: C=BM, O=QuoVadis Limited, CN=QuoVadis Root CA 2 G3 2022.07.26 14:37:21 LOG6[service]: Client CA: C=BM, O=QuoVadis Limited, CN=QuoVadis Root CA 3 G3 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Assured ID Root G2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Assured ID Root G3 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Global Root G2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Global Root G3 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Trusted Root G4 2022.07.26 14:37:21 LOG6[service]: Client CA: C=CN, O=WoSign CA Limited, CN=Certification Authority of WoSign 2022.07.26 14:37:21 LOG6[service]: Client CA: C=CN, O=WoSign CA Limited, CN=CA 沃通根证书 2022.07.26 14:37:21 LOG6[service]: Client CA: C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO RSA Certification Authority 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, ST=New Jersey, L=Jersey City, O=The USERTRUST Network, CN=USERTrust RSA Certification Authority 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, ST=New Jersey, L=Jersey City, O=The USERTRUST Network, CN=USERTrust ECC Certification Authority 2022.07.26 14:37:21 LOG6[service]: Client CA: OU=GlobalSign ECC Root CA - R4, O=GlobalSign, CN=GlobalSign 2022.07.26 14:37:21 LOG6[service]: Client CA: OU=GlobalSign ECC Root CA - R5, O=GlobalSign, CN=GlobalSign 2022.07.26 14:37:21 LOG6[service]: Client CA: C=NL, O=Staat der Nederlanden, CN=Staat der Nederlanden Root CA - G3 2022.07.26 14:37:21 LOG6[service]: Client CA: C=NL, O=Staat der Nederlanden, CN=Staat der Nederlanden EV Root CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=IdenTrust, CN=IdenTrust Commercial Root CA 1 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=IdenTrust, CN=IdenTrust Public Sector Root CA 1 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O="Entrust, Inc.", OU=See www.entrust.net/legal-terms, OU="(c) 2009 Entrust, Inc. - for authorized use only", CN=Entrust Root Certification Authority - G2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O="Entrust, Inc.", OU=See www.entrust.net/legal-terms, OU="(c) 2012 Entrust, Inc. - for authorized use only", CN=Entrust Root Certification Authority - EC1 2022.07.26 14:37:21 LOG6[service]: Client CA: C=CN, O=China Financial Certification Authority, CN=CFCA EV ROOT 2022.07.26 14:37:21 LOG6[service]: Client CA: C=TR, L=Ankara, O=TÜRKTRUST Bilgi İletişim ve Bilişim Güvenliği Hizmetleri A.Ş., CN=TÜRKTRUST Elektronik Sertifika Hizmet Sağlayıcısı H5 2022.07.26 14:37:21 LOG6[service]: Client CA: C=FR, O=Certinomis, OU=0002 433998903, CN=Certinomis - Root CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=CH, O=WISeKey, OU=OISTE Foundation Endorsed, CN=OISTE WISeKey Global Root GB CA 2022.07.26 14:37:21 LOG6[service]: Client CA: C=CN, O=WoSign CA Limited, CN=Certification Authority of WoSign G2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=CN, O=WoSign CA Limited, CN=CA WoSign ECC Root 2022.07.26 14:37:21 LOG6[service]: Client CA: C=PL, O=Krajowa Izba Rozliczeniowa S.A., CN=SZAFIR ROOT CA2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=PL, O=Unizeto Technologies S.A., OU=Certum Certification Authority, CN=Certum Trusted Network CA 2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=GR, L=Athens, O=Hellenic Academic and Research Institutions Cert. Authority, CN=Hellenic Academic and Research Institutions RootCA 2015 2022.07.26 14:37:21 LOG6[service]: Client CA: C=GR, L=Athens, O=Hellenic Academic and Research Institutions Cert. Authority, CN=Hellenic Academic and Research Institutions ECC RootCA 2015 2022.07.26 14:37:21 LOG6[service]: Client CA: C=FR, O=Certplus, CN=Certplus Root CA G1 2022.07.26 14:37:21 LOG6[service]: Client CA: C=FR, O=Certplus, CN=Certplus Root CA G2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=FR, O=OpenTrust, CN=OpenTrust Root CA G1 2022.07.26 14:37:21 LOG6[service]: Client CA: C=FR, O=OpenTrust, CN=OpenTrust Root CA G2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=FR, O=OpenTrust, CN=OpenTrust Root CA G3 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=Internet Security Research Group, CN=ISRG Root X1 2022.07.26 14:37:21 LOG6[service]: Client CA: C=ES, O=FNMT-RCM, OU=AC RAIZ FNMT-RCM 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=Amazon, CN=Amazon Root CA 1 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=Amazon, CN=Amazon Root CA 2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=Amazon, CN=Amazon Root CA 3 2022.07.26 14:37:21 LOG6[service]: Client CA: C=US, O=Amazon, CN=Amazon Root CA 4 2022.07.26 14:37:21 LOG6[service]: Client CA: C=LU, O=LuxTrust S.A., CN=LuxTrust Global Root 2 2022.07.26 14:37:21 LOG6[service]: Client CA: C=TR, L=Gebze - Kocaeli, O=Turkiye Bilimsel ve Teknolojik Arastirma Kurumu - TUBITAK, OU=Kamu Sertifikasyon Merkezi - Kamu SM, CN=TUBITAK Kamu SM SSL Kok Sertifikasi - Surum 1 2022.07.26 14:37:21 LOG6[service]: DH initialization needed for DHE-DSS-AES256-GCM-SHA384 2022.07.26 14:37:21 LOG6[service]: Using dynamic DH parameters 2022.07.26 14:37:21 LOG5[service]: Configuration successful 2022.07.26 14:37:21 LOG7[service]: Deallocating deployed section defaults 2022.07.26 14:37:21 LOG7[service]: Deallocating section [POP3 Incoming] 2022.07.26 14:37:21 LOG7[service]: Deallocating section [SMTP Outgoing] 2022.07.26 14:37:21 LOG7[service]: Binding service [POP3 Incoming] 2022.07.26 14:37:21 LOG7[service]: Listening file descriptor created (FD=840) 2022.07.26 14:37:21 LOG7[service]: Setting accept socket options (FD=840) 2022.07.26 14:37:21 LOG7[service]: Option SO_EXCLUSIVEADDRUSE set on accept socket 2022.07.26 14:37:21 LOG6[service]: Service [POP3 Incoming] (FD=840) bound to 0.0.0.0:110 2022.07.26 14:37:29 LOG7[service]: Found 1 ready file descriptor(s) 2022.07.26 14:37:29 LOG7[service]: FD=664 ifds=r-x ofds=--- 2022.07.26 14:37:29 LOG7[service]: FD=840 ifds=r-x ofds=r-- 2022.07.26 14:37:29 LOG7[service]: Service [POP3 Incoming] accepted (FD=740) from 192.168.110.11:60596 2022.07.26 14:37:29 LOG7[service]: Creating a new thread 2022.07.26 14:37:29 LOG7[service]: New thread created 2022.07.26 14:37:29 LOG7[22]: Service [POP3 Incoming] started 2022.07.26 14:37:29 LOG7[22]: Setting local socket options (FD=740) 2022.07.26 14:37:29 LOG7[22]: Option TCP_NODELAY set on local socket 2022.07.26 14:37:29 LOG5[22]: Service [POP3 Incoming] accepted connection from 192.168.110.11:60596 2022.07.26 14:37:29 LOG6[22]: Peer certificate not required 2022.07.26 14:37:29 LOG7[22]: TLS state (accept): before SSL initialization 2022.07.26 14:37:59 LOG7[22]: TLS alert (write): fatal: decode error 2022.07.26 14:37:59 LOG3[22]: SSL_accept: ssl/record/rec_layer_s3.c:308: error:0A000126:SSL routines::unexpected eof while reading 2022.07.26 14:37:59 LOG5[22]: Connection reset: 0 byte(s) sent to TLS, 0 byte(s) sent to socket 2022.07.26 14:37:59 LOG7[22]: Local descriptor (FD=740) closed 2022.07.26 14:37:59 LOG7[22]: Service [POP3 Incoming] finished (0 left) Config: ; Sample stunnel configuration file for Win64 by Michal Trojnara 2002-2022 ; Some options used here may be inadequate for your particular configuration ; This sample file does *not* represent stunnel.conf defaults ; Please consult the manual for detailed description of available options ; ************************************************************************** ; * Global options * ; ************************************************************************** ; Debugging stuff (may be useful for troubleshooting) debug = 7 output = stunnel.log log = overwrite ; Enable FIPS 140-2 mode if needed for compliance ;fips = yes ; Microsoft CryptoAPI engine allows for authentication with private keys ; stored in the Windows certificate store ; Each section using this feature also needs the "engineId = capi" option ;engine = capi ; You also need to disable TLS 1.2 or later, because the CryptoAPI engine ; currently does not support PSS ;sslVersionMax = TLSv1.1 ; TLSv1.1 requires security level 0 when compiled OpenSSL 3.0 and later securityLevel = 0 ; The pkcs11 engine allows for authentication with cryptographic ; keys isolated in a hardware or software token ; MODULE_PATH specifies the path to the pkcs11 module shared library, ; such as softhsm2-x64.dll or opensc-pkcs11.dll ; IMPORTANT: A 64-bit stunnel requires 64-bit PKCS#11 modules ; Each section using this feature also needs the "engineId = pkcs11" option ;engine = pkcs11 ;engineCtrl = MODULE_PATH:softhsm2-x64.dll ;engineCtrl = PIN:1234 ; ************************************************************************** ; * Service defaults may also be specified in individual service sections * ; ************************************************************************** ; Enable support for the insecure SSLv3 protocol ;sslVersion = all sslVersionMax=TLSv1.3 sslVersionMin=TLSv1.2 sslVersion = TLSv1.2 sslVersion = TLSv1.3 ;options = NO_SSLv2 ;options = NO_SSLv3 ;options = NO_SSLv2 ;options = NO_SSLv3 ;options = NO_TLSv1 ciphers = ALL ;ciphers = ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-DSS-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384:ECDH-RSA-AES256-GCM-SHA384:ECDH-ECDSA-AES256-GCM-SHA384:AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:DHE-RSA-AES128-GCM-SHA256:ECDH-RSA-AES128-GCM-SHA256:ECDH-ECDSA-AES128-GCM-SHA256:AES128-GCM-SHA256 options = CIPHER_SERVER_PREFERENCE cert = stunnel.pem CAfile = ca-certs.pem OCSPaia = no verify = 0 ; These options provide additional security at some performance degradation ;options = SINGLE_ECDH_USE ;options = SINGLE_DH_USE ; ************************************************************************** ; * Include all configuration file fragments from the specified folder * ; ************************************************************************** ;include = conf.d ; ************************************************************************** ; * Service definitions (at least one service has to be defined) * ; ************************************************************************** ; ***************************************** Example TLS client mode services ;[POP3 Incoming] ;client = yes ;accept = 110 ;connect = outlook.office365.com:995 ;verifyChain = yes ;CAfile = ca-certs.pem ;checkHost = outlook.office365.com ;OCSPaia = yes [POP3 Incoming] accept = 110 connect = outlook.office365.com:995 ;[SMTP Outgoing] ;accept = 25 ;connect = smtp.office365.com:587 ;[SMTP Outgoing] ;client = yes ;accept = 25 ;protocol = smtp ;connect = smtp.office365.com:587 ;verifyChain = yes ;CAfile = ca-certs.pem ;checkHost = smtp.office365.com ;OCSPaia = yes ; Encrypted HTTP proxy authenticated with a client certificate ; located in the Windows certificate store ;[example-proxy] ;client = yes ;accept = 127.0.0.1:8080 ;connect = example.com:8443 ;engineId = capi ; Encrypted HTTP proxy authenticated with a client certificate ; located in a cryptographic token ;[example-pkcs11] ;client = yes ;accept = 127.0.0.1:8080 ;connect = example.com:8443 ;engineId = pkcs11 ;cert = pkcs11:token=MyToken;object=MyCert ;key = pkcs11:token=MyToken;object=MyKey ; ***************************************** Example TLS server mode services ;[pop3s] ;accept = 995 ;connect = 110 ;cert = stunnel.pem ;[imaps] ;accept = 993 ;connect = 143 ;cert = stunnel.pem ; Either only expose this service to trusted networks, or require ; authentication when relaying emails originated from loopback. ; Otherwise the following configuration creates an open relay. ;[ssmtp] ;accept = 465 ;connect = 25 ;cert = stunnel.pem ; TLS front-end to a web server ;[https] ;accept = 443 ;connect = 80 ;cert = stunnel.pem ; "TIMEOUTclose = 0" is a workaround for a design flaw in Microsoft SChannel ; Microsoft implementations do not use TLS close-notify alert and thus they ; are vulnerable to truncation attacks ;TIMEOUTclose = 0 ; Remote cmd.exe protected with PSK-authenticated TLS ; Create "secrets.txt" containing IDENTITY:KEY pairs ;[cmd] ;accept = 1337 ;exec = c:\windows\system32\cmd.exe ;execArgs = cmd.exe ;PSKsecrets = secrets.txt ; vim:ft=dosini

1 0

CERT: Subject checks failed
by wkwok＠crestron.com 25 Jul '22

25 Jul '22

I'm new to stunnel and think it may be easier to use this in our environment. Any help would be appreciated! Here is my setup. Source and Destination OS: Windows 2022 Data Center VMs I copied the stunnel.pem from SERVER to CLIENT and named it stunnel_client.pem. I get the following error when connecting from CLIENT -> SERVER. 2022.07.23 17:30:28 LOG6[3]: SNI: sending servername: x.x.x.x 2022.07.23 17:30:28 LOG6[3]: Peer certificate required 2022.07.23 17:30:28 LOG4[3]: CERT: Subject checks failed 2022.07.23 17:30:28 LOG4[3]: Rejected by CERT at depth=0: C=US, ST=New Jersey, L=Edison, O=Crestron, OU=ProPortal, CN=vmsql-edatahub-.crestron.com 2022.07.23 17:30:28 LOG3[3]: SSL_connect: ssl/statem/statem_clnt.c:1887: error:0A000086:SSL routines::certificate verify failed 2022.07.23 17:30:28 LOG5[3]: Connection reset: 0 byte(s) sent to TLS, 0 byte(s) sent to socket *****STUNNEL.CONF***** SERVER: socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 socket = l:SO_KEEPALIVE=1 socket = r:SO_KEEPALIVE=1 options = NO_SSLv2 options = NO_SSLv3 options = NO_TLSv1 sslVersion = TLSv1.2 [ncatListener] accept = 8443 connect = 4489 cert = stunnel.pem CLIENT: socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 socket = l:SO_KEEPALIVE=1 socket = r:SO_KEEPALIVE=1 options = NO_SSLv2 options = NO_SSLv3 options = NO_TLSv1 sslVersion = TLSv1.2 [ncatSender] client = yes accept = 127.0.0.1:4488 connect = <x.x.x.x>:8443 verifyPeer = yes CAfile = stunnel_client.pem checkIP = <x.x.x.x> OCSPaia = yes

2 2

stunnel 5.65 released
by Michał Trojnara 22 Jul '22

22 Jul '22

Dear Users, I have released version 5.65 of stunnel. On Windows, this release fixes a high severity OpenSSL vulnerability: https://www.openssl.org/news/secadv/20220705.txt ### Version 5.65, 2022.07.17, urgency: HIGH * Security bugfixes - OpenSSL DLLs updated to version 3.0.5. * Bugfixes - Fixed handling globally enabled FIPS. - Fixed openssl.cnf processing in WIN32 GUI. - Fixed a number of compiler warnings. - Fixed tests on older versions of OpenSSL. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hashes: 60c500063bd1feff2877f5726e38278c086f96c178f03f09d264a2012d6bf7fc stunnel-5.65.tar.gz ca88e65888102f7526cab4edad7b30e8d1e82d428c34d5b5f00513dff9ed2288 stunnel-5.65-win64-installer.exe 9dadaa8622e1c1955728cbd8d49e1a6b5eae77bfa5340f7a1f82451121aee740 stunnel-5.65-android.zip Best regards, Mike

2 2

Using stunnel with Outlook for Mac 2011
by glow＠mrbike.com 14 Jul '22

14 Jul '22

I wonder if I can use stunnel to keep using Outlook for Mac 2011. I have Outlook running on a Macbook with Mac OS 10.9.5 (the latest version possible). I can use Outlook in this way because my ISP currently supports TLS 1.0--but that support will soon end, when my ISP migrates its mail servers to TLS 1.2. At that point, my Macbook no longer use Outlook or any similar e-mail client. Is it possible for me to use stunnel so that my Macbook's old Outlook client will work with TLS 1.2?

1 0

stunnel with Winxp
by russell.jim＠rogers.com 13 Jul '22

13 Jul '22

i've used stunnel (v5.35) for many years, always working great. my 3rd party app running on WinXP computer was always able to send emails to gmail account. last month my app on this machine failed to send emails. changing to another (non-gmail) email account did not help. i am assuming issue is something to do with tls 1.0/1.1 on Winxp machine? do i need to do something to get this WinXP app to be able to send emails (outgoing only) again? thanks so much for any advice. /jim

1 0

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