[stunnel-users] Stunnel Connectivity Issue

Thu Aug 3 15:02:44 CEST 2017

Hi, Dheeraj,

The documentation I found to set up my server was found online in message list archives and blogs. Outside of the FAQ and Documentation of stunnel.org, the only issue I ran into was with my certificate – I had been over thinking it, and stumbled upon my solution. It does not seem like that is your issue, however, and since every environment is different, I can’t actually say whether or not your configuration is appropriate or not to your given environment and use case.

I would recommend seeing how much of your use case can be replicated within your development environment, confirm that you can send and receive messages between client and server settings, and then connect with your remote server, testing with them – confirming that you see packet transmission in your stunnel logs.

Liz Turi
Sr. Consultant
Massachusetts eHealth Collaborative
860 Winter Street, Waltham, MA 02451
(m) 339-222-6614 (o) 781-907-7204 (f) 781-207-8589
www.maehc.org<http://www.maehc.org>
[fb_icon]<https://www.facebook.com/massachusettsehealthcollab?fref=nf>[li_icon]<https://www.linkedin.com/company/massachusetts-ehealth-collaborative?trk=tyah&trkInfo=clickedVertical%3Acompany%2Cidx%3A1-1-1%2CtarId%3A1432746657126%2Ctas%3AMassachusetts+eHEalth>[tw_icon]<https://twitter.com/MAeHC_org>

From: Dheeraj Gautam [mailto:dheeraj.gautam at arborfs.com]
Sent: Thursday, August 3, 2017 8:56 AM
To: Liz Turi <lturi at maehc.org>; cbrowne at cbcs-usa.com; stunnel-users at stunnel.org
Cc: Gurpreet Ahuja <gurpreet.ahuja at arborfs.com>; Sumit Sharma <sumit.sharma at arborfs.com>; Ishu Singh <ishu.singh at arborfs.com>
Subject: RE: [stunnel-users] Stunnel Connectivity Issue

Could you please suggest how we get this sort out, our partner is claiming that issue is at our end.

We have setup this stunnel connection with TLSv1.2 on our Window 2012 server.

Could you share any doc which explain how should we integrate our service with stunnel.

Also, please confirm is our configuration correct or not? We have to send request along with TLS.

Regards,

Dheeraj Gautam

From: Liz Turi [mailto:lturi at maehc.org<mailto:lturi at maehc.org>]
Sent: Thursday, August 3, 2017 6:21 PM
To: Dheeraj Gautam <dheeraj.gautam at arborfs.com<mailto:dheeraj.gautam at arborfs.com>>; cbrowne at cbcs-usa.com<mailto:cbrowne at cbcs-usa.com>; stunnel-users at stunnel.org<mailto:stunnel-users at stunnel.org>
Cc: Gurpreet Ahuja <gurpreet.ahuja at arborfs.com<mailto:gurpreet.ahuja at arborfs.com>>; Sumit Sharma <sumit.sharma at arborfs.com<mailto:sumit.sharma at arborfs.com>>; Ishu Singh <ishu.singh at arborfs.com<mailto:ishu.singh at arborfs.com>>
Subject: RE: [stunnel-users] Stunnel Connectivity Issue

I’m sorry, Dheeraj,

I cannot do that.

Liz Turi
Sr. Consultant
Massachusetts eHealth Collaborative
860 Winter Street, Waltham, MA 02451
(m) 339-222-6614 (o) 781-907-7204 (f) 781-207-8589
www.maehc.org<http://www.maehc.org>
[fb_icon]<https://www.facebook.com/massachusettsehealthcollab?fref=nf>[li_icon]<https://www.linkedin.com/company/massachusetts-ehealth-collaborative?trk=tyah&trkInfo=clickedVertical%3Acompany%2Cidx%3A1-1-1%2CtarId%3A1432746657126%2Ctas%3AMassachusetts+eHEalth>[tw_icon]<https://twitter.com/MAeHC_org>

From: Dheeraj Gautam [mailto:dheeraj.gautam at arborfs.com]
Sent: Thursday, August 3, 2017 8:46 AM
To: Liz Turi <lturi at maehc.org<mailto:lturi at maehc.org>>; cbrowne at cbcs-usa.com<mailto:cbrowne at cbcs-usa.com>; stunnel-users at stunnel.org<mailto:stunnel-users at stunnel.org>
Cc: Gurpreet Ahuja <gurpreet.ahuja at arborfs.com<mailto:gurpreet.ahuja at arborfs.com>>; Sumit Sharma <sumit.sharma at arborfs.com<mailto:sumit.sharma at arborfs.com>>; Ishu Singh <ishu.singh at arborfs.com<mailto:ishu.singh at arborfs.com>>
Subject: RE: [stunnel-users] Stunnel Connectivity Issue

Hi Liz,

The logs are being generating only when I am doing telnet to myself like telnet 127.0.0.1 9260.

No logs are coming while running the application.

Could you please remote my machine so that you can get complete understanding about the setup.

Regards,

Dheeraj Gautam

From: Liz Turi [mailto:lturi at maehc.org<mailto:lturi at maehc.org>]
Sent: Thursday, August 3, 2017 6:13 PM
To: Dheeraj Gautam <dheeraj.gautam at arborfs.com<mailto:dheeraj.gautam at arborfs.com>>; cbrowne at cbcs-usa.com<mailto:cbrowne at cbcs-usa.com>; stunnel-users at stunnel.org<mailto:stunnel-users at stunnel.org>
Cc: Gurpreet Ahuja <gurpreet.ahuja at arborfs.com<mailto:gurpreet.ahuja at arborfs.com>>; Sumit Sharma <sumit.sharma at arborfs.com<mailto:sumit.sharma at arborfs.com>>; Ishu Singh <ishu.singh at arborfs.com<mailto:ishu.singh at arborfs.com>>
Subject: RE: [stunnel-users] Stunnel Connectivity Issue

This looks like you’re successfully negotiating your client connection to the remote server, but there’s no data being transferred.

Liz Turi
Sr. Consultant
Massachusetts eHealth Collaborative
860 Winter Street, Waltham, MA 02451
(m) 339-222-6614 (o) 781-907-7204 (f) 781-207-8589
www.maehc.org<http://www.maehc.org>
[fb_icon]<https://www.facebook.com/massachusettsehealthcollab?fref=nf>[li_icon]<https://www.linkedin.com/company/massachusetts-ehealth-collaborative?trk=tyah&trkInfo=clickedVertical%3Acompany%2Cidx%3A1-1-1%2CtarId%3A1432746657126%2Ctas%3AMassachusetts+eHEalth>[tw_icon]<https://twitter.com/MAeHC_org>

From: Dheeraj Gautam [mailto:dheeraj.gautam at arborfs.com]
Sent: Thursday, August 3, 2017 8:38 AM
To: Liz Turi <lturi at maehc.org<mailto:lturi at maehc.org>>; cbrowne at cbcs-usa.com<mailto:cbrowne at cbcs-usa.com>; stunnel-users at stunnel.org<mailto:stunnel-users at stunnel.org>
Cc: Gurpreet Ahuja <gurpreet.ahuja at arborfs.com<mailto:gurpreet.ahuja at arborfs.com>>; Sumit Sharma <sumit.sharma at arborfs.com<mailto:sumit.sharma at arborfs.com>>; Ishu Singh <ishu.singh at arborfs.com<mailto:ishu.singh at arborfs.com>>
Subject: RE: [stunnel-users] Stunnel Connectivity Issue

Hi Liz,

Find attached stunnel log herewith, yes the configured remote server IP address and port details are correct.
At remote end they have allowed our source address and they are getting an error during TLS handshake, the issue appears to be with the TLS certificate and are sending them back resulting in the handshake error.
Also, please let us know if we can have a call with you and remote session to get this fix.
I will be thankful to you.
Regards,
Dheeraj Gautam

From: Liz Turi [mailto:lturi at maehc.org<mailto:lturi at maehc.org>]
Sent: Thursday, August 3, 2017 5:58 PM
To: Dheeraj Gautam <dheeraj.gautam at arborfs.com<mailto:dheeraj.gautam at arborfs.com>>; cbrowne at cbcs-usa.com<mailto:cbrowne at cbcs-usa.com>; stunnel-users at stunnel.org<mailto:stunnel-users at stunnel.org>
Cc: Gurpreet Ahuja <gurpreet.ahuja at arborfs.com<mailto:gurpreet.ahuja at arborfs.com>>; Sumit Sharma <sumit.sharma at arborfs.com<mailto:sumit.sharma at arborfs.com>>; Ishu Singh <ishu.singh at arborfs.com<mailto:ishu.singh at arborfs.com>>
Subject: RE: [stunnel-users] Stunnel Connectivity Issue

What do your debug logs say? What happens when you send a test message through? Are you sure you have the remote IP address/port correct? Is there IP filtering or a firewall in place between the two?

Liz Turi
Sr. Consultant
Massachusetts eHealth Collaborative
860 Winter Street, Waltham, MA 02451
(m) 339-222-6614 (o) 781-907-7204 (f) 781-207-8589
www.maehc.org<http://www.maehc.org>
[fb_icon]<https://www.facebook.com/massachusettsehealthcollab?fref=nf>[li_icon]<https://www.linkedin.com/company/massachusetts-ehealth-collaborative?trk=tyah&trkInfo=clickedVertical%3Acompany%2Cidx%3A1-1-1%2CtarId%3A1432746657126%2Ctas%3AMassachusetts+eHEalth>[tw_icon]<https://twitter.com/MAeHC_org>

From: Dheeraj Gautam [mailto:dheeraj.gautam at arborfs.com]
Sent: Thursday, August 3, 2017 5:27 AM
To: Liz Turi <lturi at maehc.org<mailto:lturi at maehc.org>>; cbrowne at cbcs-usa.com<mailto:cbrowne at cbcs-usa.com>; stunnel-users at stunnel.org<mailto:stunnel-users at stunnel.org>
Cc: Gurpreet Ahuja <gurpreet.ahuja at arborfs.com<mailto:gurpreet.ahuja at arborfs.com>>; Sumit Sharma <sumit.sharma at arborfs.com<mailto:sumit.sharma at arborfs.com>>; Ishu Singh <ishu.singh at arborfs.com<mailto:ishu.singh at arborfs.com>>
Subject: RE: [stunnel-users] Stunnel Connectivity Issue

Hi Liz,

We have stuck badly to establish stunnel connection with one of our partner, We have configured Client mode configuration on our server to connect server to run the application.

Below is the config which We have done on my server:

; ***************************************** Example TLS Client mode services
; Certificate
cert = Talomoncert.pem
key = Talomonkey.pem
CAfile = TalomonCACerts.pem
;FIPS
fips=no
; Protocol version (all, SSLv2, SSLv3, TLSv1)
sslVersion = TLSv1.2

; Some performance tunings
socket = l:TCP_NODELAY=1
socket = r:TCP_NODELAY=1

; Some debugging stuff useful for troubleshooting
debug = 7
output = stunnel.log

; Use it for client mode
client = yes
; Service-level configuration
[FIX]
accept = 127.0.0.1:9260<http://127.0.0.1:9260>
connect = 69.191.230.34:8228<http://69.191.230.34:8228>
;protocol=connect
;protocolHost= 69.191.230.34:8228<http://69.191.230.34:8228>
TIMEOUTconnect  = 5

Our partner saying that they are not getting any TLS connection on their server due to which connection is not establishing.

Could you please help us to get this sort out as we have no more idea how we can troubleshoot this.

Thanks in advance.

Regards,

Dheeraj Gautam

From: Liz Turi [mailto:lturi at maehc.org<mailto:lturi at maehc.org>]
Sent: Tuesday, June 13, 2017 11:40 PM
To: Dheeraj Gautam <dheeraj.gautam at arborfs.com<mailto:dheeraj.gautam at arborfs.com>>; cbrowne at cbcs-usa.com<mailto:cbrowne at cbcs-usa.com>; stunnel-users at stunnel.org<mailto:stunnel-users at stunnel.org>
Subject: RE: [stunnel-users] Stunnel Connectivity Issue

Hi, Dheeraj,

Your logs say that you’re connecting successfully to the port that your application is listening on. Have you tried testing from the application, or calls to the application?

This line (along with the next couple of lines) suggest that telnet is connecting through to the remote host listening on 8228.

2017.06.13 16:38:38 LOG5[11]: s_connect: connected 69.191.198.34:8228<http://69.191.198.34:8228>

It closes the connection via telnet because telnet isn’t going to run your application for you.

We need more information about how you’re connecting to your application? (or intending to)

Liz Turi
Sr. Consultant
Massachusetts eHealth Collaborative
860 Winter Street, Waltham, MA 02451
(m) 339-222-6614 (o) 781-907-7204 (f) 781-207-8589
www.maehc.org<http://www.maehc.org>
[fb_icon]<https://www.facebook.com/massachusettsehealthcollab?fref=nf>[li_icon]<https://www.linkedin.com/company/massachusetts-ehealth-collaborative?trk=tyah&trkInfo=clickedVertical%3Acompany%2Cidx%3A1-1-1%2CtarId%3A1432746657126%2Ctas%3AMassachusetts+eHEalth>[tw_icon]<https://twitter.com/MAeHC_org>

From: stunnel-users [mailto:stunnel-users-bounces at stunnel.org] On Behalf Of Dheeraj Gautam
Sent: Tuesday, June 13, 2017 1:21 PM
To: cbrowne at cbcs-usa.com<mailto:cbrowne at cbcs-usa.com>; stunnel-users at stunnel.org<mailto:stunnel-users at stunnel.org>
Subject: Re: [stunnel-users] Stunnel Connectivity Issue

Hi Browne,

I am not understand like what config I have to do in stunnel config file.

As per application it will trigger 8228 port of remote server, but at the momen stunnel is working only when I am trying to telnet localhost on 9233 port.

Nothing is happening when running the application, don’t know what I am missing as I am the new for stunnel.

Please help to fix this out.

Regards,

Dheeraj Gautam

From: stunnel-users [mailto:stunnel-users-bounces at stunnel.org] On Behalf Of Carter Browne
Sent: Tuesday, June 13, 2017 10:41 PM
To: stunnel-users at stunnel.org<mailto:stunnel-users at stunnel.org>
Subject: Re: [stunnel-users] Stunnel Connectivity Issue

Dheeraj,

stunnel will keep the connection open for as long as your applications keeps it open.  When you exit telnet, it closes the connection.  I use stunnel mostly for RDP, VNC and telnet and as long the application is active, the port is open.  You need to have your application open the local port you want to route via stunnel (in your example 127.0.0.1:9233<http://127.0.0.1:9233>).  As long as your application keeps the connection open (ignoring such issues as communications failures), stunnel will maintain the application.  Telnet is a great tool for determining connectivity, but your application is going to have to handle the connection going forward.

Carter Browne

On 6/13/2017 12:01 PM, Dheeraj Gautam wrote:
Hi Liz,

Thanks for your reply.

Actually we need to run a service which will work only once stunnel connection establish and the service will work till the time connection connected.

But at the moment I don’t have idea like how the stunnel will remain connected.

Could you please suggest me to fix this so that stunnel connection remain connected and I can run the application.

Waiting for your valuable response.

Regards,

Dheeraj Gautam

From: Liz Turi [mailto:lturi at maehc.org]
Sent: Tuesday, June 13, 2017 9:19 PM
To: Dheeraj Gautam <dheeraj.gautam at arborfs.com><mailto:dheeraj.gautam at arborfs.com>; Małgorzata Olszówka <Malgorzata.Olszowka at stunnel.org><mailto:Malgorzata.Olszowka at stunnel.org>
Cc: stunnel-users at stunnel.org<mailto:stunnel-users at stunnel.org>
Subject: RE: [stunnel-users] Stunnel Connectivity Issue

Hi, Dheeraj,

Are you testing the connection with Telnet? Or are you testing with the application. What I noticed in testing the connection is that once the command is completed, the connection is closed.

However, when I test from my application, its only closed once all transactions in that session are completed, and will show how much data was passed on (following from my logs at the end of a non-telnet test session.

2017.06.13 10:16:08 LOG6[1]: Negotiated TLSv1.2 ciphersuite AES256-GCM-SHA384 (256-bit encryption)
2017.06.13 10:16:18 LOG6[1]: Read socket closed (readsocket)
2017.06.13 10:16:18 LOG6[1]: SSL_shutdown successfully sent close_notify alert
2017.06.13 10:16:18 LOG6[1]: TLS closed (SSL_read)
2017.06.13 10:16:18 LOG5[1]: Connection closed: 2791 byte(s) sent to TLS, 1641 byte(s) sent to socket

Liz Turi
Sr. Consultant
Massachusetts eHealth Collaborative
860 Winter Street, Waltham, MA 02451
(m) 339-222-6614 (o) 781-907-7204 (f) 781-207-8589
www.maehc.org<http://www.maehc.org>
[fb_icon]<https://www.facebook.com/massachusettsehealthcollab?fref=nf>[li_icon]<https://www.linkedin.com/company/massachusetts-ehealth-collaborative?trk=tyah&trkInfo=clickedVertical%3Acompany%2Cidx%3A1-1-1%2CtarId%3A1432746657126%2Ctas%3AMassachusetts+eHEalth>[tw_icon]<https://twitter.com/MAeHC_org>

From: stunnel-users [mailto:stunnel-users-bounces at stunnel.org] On Behalf Of Dheeraj Gautam
Sent: Tuesday, June 13, 2017 11:41 AM
To: Małgorzata Olszówka <Malgorzata.Olszowka at stunnel.org<mailto:Malgorzata.Olszowka at stunnel.org>>
Cc: stunnel-users at stunnel.org<mailto:stunnel-users at stunnel.org>
Subject: Re: [stunnel-users] Stunnel Connectivity Issue

HI Guys,

below is the config which i have configured with TLSv1.2, but still connection establishing only for while when i telnet telnet 127.0.0.1 9233. and just after connection closed.

[TCP]
client=yes
cert = BBG_cert.pem
key = BBG_key.pem
verifyChain = yes
CAfile = BBG_CACerts.pem
connect = 69.191.198.34:8228<http://69.191.198.34:8228>
accept  = 127.0.0.1:9233<http://127.0.0.1:9233>
sslVersion = TLSv1.2

below the logs:

2017.06.13 11:57:49 LOG5[main]: Reading configuration from file stunnel.conf
2017.06.13 11:57:49 LOG5[main]: UTF-8 byte order mark detected
2017.06.13 11:57:49 LOG5[main]: FIPS mode disabled
2017.06.13 11:57:49 LOG3[main]: Service [TCP]: Each service must define two endpoints
2017.06.13 11:57:49 LOG3[main]: Failed to reload the configuration file
2017.06.13 16:37:16 LOG5[main]: Reading configuration from file stunnel.conf
2017.06.13 16:37:16 LOG5[main]: UTF-8 byte order mark detected
2017.06.13 16:37:16 LOG5[main]: FIPS mode disabled
2017.06.13 16:37:16 LOG4[main]: Service [TCP] uses "verifyChain" without subject checks
2017.06.13 16:37:16 LOG4[main]: Use "checkHost" or "checkIP" to restrict trusted certificates
2017.06.13 16:37:16 LOG5[main]: Configuration successful
2017.06.13 16:38:38 LOG5[11]: Service [TCP] accepted connection from 127.0.0.1:62736<http://127.0.0.1:62736>
2017.06.13 16:38:38 LOG5[11]: s_connect: connected 69.191.198.34:8228<http://69.191.198.34:8228>
2017.06.13 16:38:38 LOG5[11]: Service [TCP] connected remote server from 172.16.1.23:62737<http://172.16.1.23:62737>
2017.06.13 16:38:39 LOG5[11]: Certificate accepted at depth=0: C=US, ST=NEW YORK, L=NEW YORK, O=Bloomberg LP, OU=FIXBETA, CN=fixbeta.bloomberg.com<http://fixbeta.bloomberg.com>, emailAddress=caadmin at bloomberg.com<mailto:caadmin at bloomberg.com>
2017.06.13 16:39:10 LOG5[11]: Connection closed: 0 byte(s) sent to TLS, 0 byte(s) sent to socket

i want connection remained connected every time so that i can run the application.

application can be work only if the connection remain connected.

please help me to sort this out.

Regards,

Dheeraj Gautam

On 25 May 2017 at 12:29, Małgorzata Olszówka <Malgorzata.Olszowka at stunnel.org<mailto:Malgorzata.Olszowka at stunnel.org>> wrote:
Could you please let us know what parameters we are missing here due to which connection is not establishing with remote server.

Although, stunnel logs indicating that configuration successful, but in logs no where is mentioned about the connection is it connected or not,

Hello Dheeraj,

You should set the verifyChain option in order to verify the certificate stored in the file specified with CAfile:
verifyChain = yes

Then you can test your connection:
telnet 127.0.0.1 9233
the stunnel logs will show information about the connection attempt.

Regards,
Małgorzata
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Whilst we have taken reasonable precautions to ensure that this e-mail and any attachment has been checked for viruses, we cannot guarantee that they are virus free and we cannot accept liability for any damage sustained as a result of software viruses.  We would advise that you carry out your own virus checks, especially before opening an attachment.

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Whilst we have taken reasonable precautions to ensure that this e-mail and any attachment has been checked for viruses, we cannot guarantee that they are virus free and we cannot accept liability for any damage sustained as a result of software viruses.  We would advise that you carry out your own virus checks, especially before opening an attachment.

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This e-mail and any attachment are confidential and contain proprietary information, some or all of which may be legally privileged.

It is intended solely for the use of the individual or entity to which it is addressed.  If you are not the intended recipient, please notify the author immediately by telephone or by replying to this e-mail, and then delete all copies of the e-mail on your system.  If you are not the intended recipient, you must not use, disclose, distribute, copy, print or rely on this e-mail.

Whilst we have taken reasonable precautions to ensure that this e-mail and any attachment has been checked for viruses, we cannot guarantee that they are virus free and we cannot accept liability for any damage sustained as a result of software viruses.  We would advise that you carry out your own virus checks, especially before opening an attachment.

CONFIDENTIALITY NOTICE
The information contained in this email transmission is legally privileged and confidential information intended only for the use of the addressee named above. If the reader of this message is not the intended recipient you are hereby notified that any dissemination, distribution or copying of this email transmission is strictly prohibited. If you have received this email transmission in error, please notify us immediately. Thank you.

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