Re: 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>
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From: Dheeraj Gautam [mailto:[email protected]]
Sent: Thursday, August 3, 2017 5:27 AM
To: Liz Turi <[email protected]>; [email protected]; [email protected]
Cc: Gurpreet Ahuja <[email protected]>; Sumit Sharma <[email protected]>; Ishu Singh <[email protected]>
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:[email protected]<mailto:[email protected]>]
Sent: Tuesday, June 13, 2017 11:40 PM
To: Dheeraj Gautam <[email protected]<mailto:[email protected]>>; [email protected]<mailto:[email protected]>; [email protected]<mailto:[email protected]>
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:[email protected]] On Behalf Of Dheeraj Gautam
Sent: Tuesday, June 13, 2017 1:21 PM
To: [email protected]<mailto:[email protected]>; [email protected]<mailto:[email protected]>
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:[email protected]] On Behalf Of Carter Browne
Sent: Tuesday, June 13, 2017 10:41 PM
To: [email protected]<mailto:[email protected]>
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:[email protected]]
Sent: Tuesday, June 13, 2017 9:19 PM
To: Dheeraj Gautam <[email protected]><mailto:[email protected]>; Małgorzata Olszówka <[email protected]><mailto:[email protected]>
Cc: [email protected]<mailto:[email protected]>
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:[email protected]] On Behalf Of Dheeraj Gautam
Sent: Tuesday, June 13, 2017 11:41 AM
To: Małgorzata Olszówka <[email protected]<mailto:[email protected]>>
Cc: [email protected]<mailto:[email protected]>
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>, [email protected]<mailto:[email protected]>
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 <[email protected]<mailto:[email protected]>> 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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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.

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