[stunnel-users] Stunnel Connectivity Issue

Tue Jun 13 19:21:27 CEST 2017

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
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).  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  <mailto:dheeraj.gautam at arborfs.com> <dheeraj.gautam at arborfs.com>; Małgorzata Olszówka  <mailto:Malgorzata.Olszowka at stunnel.org> <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

 <http://www.maehc.org> www.maehc.org

 <https://www.facebook.com/massachusettsehealthcollab?fref=nf>  <https://www.linkedin.com/company/massachusetts-ehealth-collaborative?trk=tyah&trkInfo=clickedVertical%3Acompany%2Cidx%3A1-1-1%2CtarId%3A1432746657126%2Ctas%3AMassachusetts+eHEalth>  <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 
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