- stunnel-users - stunnel.org

(no subject)
by Eric Poythress 02 Sep '15

02 Sep '15

I am having some issues with getting Stunnel to work for my application. I'm using a logger that is able to email out alarms but it is not encrypted. I have Stunnel on the PC that connects to the logger. Both are able to see each other just fine but I have the following error in the log: Service [SMTP Outgoing] needs authentication to prevent MITM attacks I only want mail to go out and on the logger side of things my only inputs are SMTP Server, Use SMTP Authentication check box, Username, Password and Port. Any help or suggests would be greatly appreciated. Thank you, Eric Poythress Test Manager 1600 West Tacoma Street Broken Arrow, Oklahoma 74012 [Description: Air Hygiene Office - email signature] Direct - (918) 994-4171 Fax - (918) 307-9131 Mobile - (573) 587-0226 Toll Free - (888) 461-8778 virtual tour Air Hygiene: http://host.newspin360.net/airhygiene/ e-mail: epoythress(a)airhygiene.com<mailto:epoythress@airhygiene.com> website: www.airhygiene.com<http://www.airhygiene.com/>

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Security suggestions on stunnel with SSL/TLS and SNI configuration
by Secure-Mail User 28 Aug '15

28 Aug '15

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Re: [stunnel-users] stunk closing connections with RST
by Ade Ajibade 26 Aug '15

26 Aug '15

> > Hi All, > > I am having the same problem in my lab. > > I am trying to set up a secure connection between my Bluecoat proxy and stunnel running on windows. I need to encrypt the connection between the 2 devices. > > I am new to stunnel. > > My Bluecoat is configured to do health checks to the stunnel on the specified stunnel port. However every now and again, it reports the server is down. Looking at the capture, I can see the stunnel is sending RESETS back to the proxy. > > The TLS connection to the proxy appears to be working fine. But I need to be able to monitor the servers health. > > How do I do this? > > You have mentioned in your post the stunnel configured of client = yes. > > On what side does this need to be configured and what exactly does this mean? If it is configured as client = no what will be the implication. > > I have been looking at how you solved the F5 issue but how does that apply to what I am doing from my proxy. > > Please any help will be useful. I just subscribed to your site. > > Thank you > > > > Adekunle

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New Windows installer
by Michal Trojnara 19 Aug '15

19 Aug '15

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Dear Users, I have performed a major rewrite of the stunnel installer for Windows. It now allows installing stunnel for all users (as before), and also for the current user (in the user's home directory). It also no longer installs all the files into a single directory. The installer attempts to automatically migrate the previous layout into the new one. https://www.stunnel.org/downloads/beta/stunnel-5.23b4-installer.exe Please give it a try and let me know your comments and any bugs you can find. Mike -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJVziEpAAoJEC78f/DUFuAUFFIP/1CN9Bh5PFvpUlmnC67exLA4 CfPLXK4jj3PjFISF3scKAGJJjaCmyWQzF3mmTTn5HXprCfwOtZXf3jJQVI0YFZjE 8OgxpdcWhAyuOr2wQLSs5DX+WBILuxHBpIIJrjYIlrAsKMwmB7ucLHf17K+AkCjb j++ctJdFDQygpX0w9Qp0oyIbiEGlgaFHAn/aeYKdLSzTGaDkTptswMsM+SZzNcHF bK9VxQ15xFE6EwOp45roxc7eMuOd6VGQ9uyj1DcLaHygE0m5ALzXFN2Xsnii9UIq ZbzoOMBYlGYAya8Hbgrrb3D+53CwwQrhjVgE27FbMp3qc4ijboaBlfSzd+Bci3Rg B84EkJjBNC1cOcl5JvB/QAuJgXReBbFecS5+8PYNTzii6HU4bFXKb9JlbxCA7eGm HiCkn+DM4GJ3RXtWYjcyWfhlgCx69SUaEJvtphHl9QLbyGnDsJTE7rLlmpnp4B2N MNvZFhxuZrBsMmDRydQSYKaJ7S5e9H6soi630OfLxHDIbOGD+vDVvO9XrjtdYWBO 6Fm4ed0lDuTcqTzCxy93vbwPkWzvPyOykQPCED/UQ1RgtC8AIi6JVXhCwLs30pwj rSHgBKGxC5E19MXYwrNq3cr0nJdkw4oh8NShaXiplfhdCMdjRZHZz1HpbQzW0WP/ Z5BrUzv9yYpA/aAk4r7V =RSFJ -----END PGP SIGNATURE-----

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net::ERR_TIMED_OUT error when connecting to a websocket via stunnel
by Mike Alhayek 17 Aug '15

17 Aug '15

Hi, I hope someone can help me here as I have been stuck for the past 3 days. I need to allow a client to connect to a websocket running on server 10.0.4.160 on port 8080. I need to setup a secure tunnel to allow the client to connect to the websocket via port 58443. I installed the latest version of stunnel on my windows Server 2008 R2. Then I changed my stunnel.conf file to look like this [websockets] client = yes accept = 58443 connect = 8080 verify = 2 checkIP = 10.0.4.195 CAfile = ca-certs.pem debug = 7 OCSPaia = yes ##The rest have been removed I am expecting to open a connection from the user's console on port 58443 and the stunnel will allow the client to connect to port 8080 This is the code that I use in the client's console "Of course, the console is on a PC that is on my internal network" var conn = new WebSocket('wss://10.0.4.160:58443'); conn.onopen = function(e) { console.log("Connection established!"); }; conn.onmessage = function(e) { console.log(e.data); }; While on the server, I open up a command line and I execute this telnet localhost 8080 to open up a command line where I can see the incoming request. As soon as I fire the code above from a client javascript's console I see this in the server's command line [cid:image001.png@01D0D8E6.8F1CC750] But few seconds later I get this error in the client's console WebSocket connection to 'wss://10.0.4.160:58443/' failed: Error in connection establishment: net::ERR_TIMED_OUT If I try to send a command using conn.sent('Hello') I get this error VM289:2 Uncaught DOMException: Failed to execute 'send' on 'WebSocket': Still in CONNECTING state. at Error (native) at <anonymous>:2:6 at Object.InjectedScript._evaluateOn (<anonymous>:905:140) at Object.InjectedScript._evaluateAndWrap (<anonymous>:838:34) at Object.InjectedScript.evaluate (<anonymous>:694:21) Additionally, I tried to turn on debugging in strunnel by adding debug = 7 to the config file This is what I got in the stunnel console. I don't understand what is wrong as the logs show that the client is connected but I can't send messages from the client to the server 2015.08.16 16:40:06 LOG7[36]: Service [websockets] started 2015.08.16 16:40:06 LOG5[36]: Service [websockets] accepted connection from 10.0.4.195:21963 2015.08.16 16:40:06 LOG6[36]: s_connect: connecting 127.0.0.1:8080 2015.08.16 16:40:06 LOG7[36]: s_connect: s_poll_wait 127.0.0.1:8080: waiting 10 seconds 2015.08.16 16:40:06 LOG5[36]: s_connect: connected 127.0.0.1:8080 2015.08.16 16:40:06 LOG5[36]: Service [websockets] connected remote server from 127.0.0.1:50891 2015.08.16 16:40:06 LOG7[36]: Remote socket (FD=668) initialized 2015.08.16 16:40:06 LOG6[36]: SNI: sending servername: localhost 2015.08.16 16:40:06 LOG7[36]: SSL state (connect): before/connect initialization 2015.08.16 16:40:06 LOG7[36]: SSL state (connect): SSLv2/v3 write client hello A What am I doing wrong here? How come the connection keeps failing?

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Accept connection from sub-net?
by v v 12 Aug '15

12 Aug '15

Hi, Is it possible to configure stunnel server to accept connection from any IP in some subnet. For example, 111.22.33.xx. The proxy I connect through every time uses the different IP (from some IP pool) to connect to stunnel server. I don't want to add to the config file 255 possible host addresses. I don't see any suitable option in the stunnel documentation. Do I miss something? Any idea it could be done? Thanks, vov

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Problem in connecting with root directory with stunnel connection in Mac OS
by Saurabh Beriwal 07 Aug '15

07 Aug '15

Hello All I am installing stunnel as client in Mac machine. I am using below configuration. accept=127.0.0.1:119 connect=target server information I am able to start stunnel service and its getting bound also. Now when I try to open the remote server directory with root folder , this does not work. However if I specify a shared folder name then this does work. I am facing this problem in Mac OS 10.10. smb://127.0.0.1:119/ does not work. smb://127.0.0.1:119/folderName works fine. However, both cases work fine in case of windows using stunnel. Please let me know if someone has faced similar issue in Mac OS with stunnel connection. Kindly help. Regards Saurabh Beriwal

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STunnel nCipher openssl chil problems
by Marc Phillips 06 Aug '15

06 Aug '15

Has anyone managed to get STunnel to work with nCipher using the chil engine? STunnel appears to load the engine just fine, but failes when loading the key: [ ] Enabling support for engine "chil" [ ] Initializing engine #1 (chil) [ ] Engine #1 (chil) initialized [.] FIPS mode disabled [ ] Compression disabled [ ] PRNG seeded successfully [ ] Initializing service [https-server] [ ] Loading certificate from file: /usr/local/stunnel/etc/keystores/servercert.crt [ ] Loading key from engine: /usr/local/stunnel/etc/keystores/servercert.key [!] error queue: 26096080: error:26096080:engine routines:ENGINE_load_private_key:failed loading private key [!] ENGINE_load_private_key: 80069066: error:80069066:CHIL engine:HWCRHK_LOAD_PRIVKEY:chil error [!] Service [https-server]: Failed to initialize SSL context Using openssl directly, the key works fine (both with s_server and s_client). My stunnel config is pretty simple: pid = /usr/local/var/log/stunnel.pid debug = 7 output = /usr/local/var/log/stunnel.log options = -NO_SSLv3 engine = chil CApath = /usr/local/etc/cacerts/ [https-server] engineNum=1 accept = 4466 connect = 4433 cert=/usr/local/stunnel/etc/keystores/servercert.crt key=/usr/local/stunnel/etc/keystores/servercert.key R. Marc

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Install Guide for STunnel Version 5.22
by Deepak Subbanarasimha 05 Aug '15

05 Aug '15

All, Is there an install guide for Stunnel version 5.22 for windows? If so, could you point me to it? -Deepak IMPORTANT NOTICE: This email is intended solely for the use of the individual to whom it is addressed and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If the reader of this email is not the intended recipient or the employee or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately return the original message to the sender at the listed email address. In accordance with Kewill policy, emails sent and received may be monitored. Although Kewill takes reasonable precautions to minimize the risk, Kewill accepts no responsibility for any loss or damage should this email contain any virus, or similar destructive or mischievous code.

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"Chained" stunnel instances
by Michael Gebis 01 Aug '15

01 Aug '15

Hello. I have a question about a strange stunnel configuration; specifically, I'm like to use 'chained' stunnel instances, and I'm running into an issue. We have a conceptually simple setup: a client that connects to a server. We use stunnel both for encryption and for the failover mechanism. Here's a diagram of our simplest setup: /----S1 / C--st0-----S2 \ \----S3 We have a client that connects to stunnel. Our stunnel configuration lists three connections with "prio" failover mode. So usually, connections go from C thru st and onto Server 1. If S1 is down, st0 fails to connect to S1 and instead tries S2, and all is good. However, sometimes we may place an optional second instance of stunnel in front of the servers. /----st1--S1 / C--st0-----st2--S2 \ \----st3--S3 The failover mode of stunnel does not work so well in this configuration. If S1 is down, st0's failover algorithm does not kick in. Instead, st0 happily connects to st1, which is still alive and running. st1 then detects S1 is down and immediately closes the connection, but st0 does not care. Since the initial connection was successful, it does not initiate the failover algorithm. You may ask "why not change to round-robin mode?" The answer is that S1 is a dedicated machine, and S2/S3 are underpowered backups that have other primary responsibilities. We really want to direct all connections to S1 and only use S2/S3 in emergencies. You may also ask, "Why the second layer of stunnel?"--unfortunately, there are several hairy implementation-specific details that make this hard to change. My question is: is there any stunnel configuration option that can help us out? We would like the failover to work with and without the second layer of stunnel. From looking at the source code, I think I'm out of luck, but I figured it couldn't hurt to ask. Thanks! Michael

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