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List: stunnel-users
Subject: [stunnel-users] TLS socket closed (SSL_write) with unsent byte(s)
From: Cotswold Group - Stephen Murray <stephenmurray () cotswoldgroup ! com>
Date: 2018-01-16 14:58:23
Message-ID: ddb9580c45544172b24a3c0982f20c26 () winhexbeeu50 ! win ! mail
[Download RAW message or body]
Hi All,
We use stunnel to send emails from our scanners to our hosted mail provider (that now \
only accept TLS connections). This has been working well for a number of years, but \
just recently the scanners (all Lexmark) have sporadically been giving errors of \
'connection failed'.
If I check the stunnel logs, the failed send has an extra line in of TLS socket \
closed (SSL_write) with 418 unsent byte(s)
Below are 2 examples, 59 was sent successfully, 60 was not.
2018.01.16 14:37:24 LOG5[59]: Service [fasthosts-smtp] accepted connection from \
10.226.174.95:11473 2018.01.16 14:37:24 LOG5[59]: s_connect: connected \
213.171.216.50:465 2018.01.16 14:37:24 LOG5[59]: Service [fasthosts-smtp] connected \
remote server from 10.226.150.9:52577 2018.01.16 14:37:24 LOG5[59]: OCSP: Connecting \
the AIA responder "http://t2.symcb.com" 2018.01.16 14:37:24 LOG5[59]: s_connect: \
connected 23.55.155.27:80 2018.01.16 14:37:24 LOG5[59]: OCSP: Certificate accepted
2018.01.16 14:37:24 LOG5[59]: OCSP: Connecting the AIA responder \
"http://tj.symcd.com" 2018.01.16 14:37:25 LOG5[59]: s_connect: connected \
23.55.155.27:80 2018.01.16 14:37:25 LOG5[59]: OCSP: Certificate accepted
2018.01.16 14:37:25 LOG5[59]: Certificate accepted at depth=0: C=GB, \
ST=Gloucestershire, L=Gloucester, O=Fasthosts Internet Limited, OU=NOC, \
CN=smtp.livemail.co.uk 2018.01.16 14:37:29 LOG5[59]: Connection closed: 167106 \
byte(s) sent to TLS, 376 byte(s) sent to socket
2018.01.16 14:38:19 LOG5[60]: Service [fasthosts-smtp] accepted connection from \
10.226.174.95:11483 2018.01.16 14:38:19 LOG5[60]: s_connect: connected \
213.171.216.50:465 2018.01.16 14:38:19 LOG5[60]: Service [fasthosts-smtp] connected \
remote server from 10.226.150.9:52620 2018.01.16 14:38:19 LOG5[60]: OCSP: Connecting \
the AIA responder "http://t2.symcb.com" 2018.01.16 14:38:19 LOG5[60]: s_connect: \
connected 23.55.155.27:80 2018.01.16 14:38:19 LOG5[60]: OCSP: Certificate accepted
2018.01.16 14:38:19 LOG5[60]: OCSP: Connecting the AIA responder \
"http://tj.symcd.com" 2018.01.16 14:38:19 LOG5[60]: s_connect: connected \
23.55.155.27:80 2018.01.16 14:38:19 LOG5[60]: OCSP: Certificate accepted
2018.01.16 14:38:19 LOG5[60]: Certificate accepted at depth=0: C=GB, \
ST=Gloucestershire, L=Gloucester, O=Fasthosts Internet Limited, OU=NOC, \
CN=smtp.livemail.co.uk 2018.01.16 14:38:24 LOG3[60]: TLS socket closed (SSL_write) \
with 418 unsent byte(s) 2018.01.16 14:38:24 LOG5[60]: Connection reset: 964 byte(s) \
sent to TLS, 392 byte(s) sent to socket
Has anyone come across this before?
Our mail provider has send limits in place of 50 every 10 minutes, but I am confident \
we are not reaching those amounts.
Any help appreciated.
Regards, Stephen
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<p class="MsoNormal">Hi All,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We use stunnel to send emails from our scanners to our hosted \
mail provider (that now only accept TLS connections).<o:p></o:p></p> <p \
class="MsoNormal">This has been working well for a number of years, but just recently \
the scanners (all Lexmark) have sporadically been giving errors of ‘connection \
failed’.<o:p></o:p></p> <p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If I check the stunnel logs, the failed send has an extra line \
in of TLS socket closed (SSL_write) with 418 unsent byte(s)<o:p></o:p></p> <p \
class="MsoNormal"><o:p> </o:p></p> <p class="MsoNormal">Below are 2 examples, 59 \
was sent successfully, 60 was not.<o:p></o:p></p> <p \
class="MsoNormal"><o:p> </o:p></p> <p class="MsoNormal">2018.01.16 14:37:24 \
LOG5[59]: Service [fasthosts-smtp] accepted connection from \
10.226.174.95:11473<o:p></o:p></p> <p class="MsoNormal">2018.01.16 14:37:24 LOG5[59]: \
s_connect: connected 213.171.216.50:465<o:p></o:p></p> <p \
class="MsoNormal">2018.01.16 14:37:24 LOG5[59]: Service [fasthosts-smtp] connected \
remote server from 10.226.150.9:52577<o:p></o:p></p> <p class="MsoNormal">2018.01.16 \
14:37:24 LOG5[59]: OCSP: Connecting the AIA responder \
"http://t2.symcb.com"<o:p></o:p></p> <p class="MsoNormal">2018.01.16 \
14:37:24 LOG5[59]: s_connect: connected 23.55.155.27:80<o:p></o:p></p> <p \
class="MsoNormal">2018.01.16 14:37:24 LOG5[59]: OCSP: Certificate \
accepted<o:p></o:p></p> <p class="MsoNormal">2018.01.16 14:37:24 LOG5[59]: OCSP: \
Connecting the AIA responder "http://tj.symcd.com"<o:p></o:p></p> <p \
class="MsoNormal">2018.01.16 14:37:25 LOG5[59]: s_connect: connected \
23.55.155.27:80<o:p></o:p></p> <p class="MsoNormal">2018.01.16 14:37:25 LOG5[59]: \
OCSP: Certificate accepted<o:p></o:p></p> <p class="MsoNormal">2018.01.16 14:37:25 \
LOG5[59]: Certificate accepted at depth=0: C=GB, ST=Gloucestershire, L=Gloucester, \
O=Fasthosts Internet Limited, OU=NOC, CN=smtp.livemail.co.uk<o:p></o:p></p> <p \
class="MsoNormal">2018.01.16 14:37:29 LOG5[59]: Connection closed: 167106 byte(s) \
sent to TLS, 376 byte(s) sent to socket<o:p></o:p></p> <p \
class="MsoNormal"><o:p> </o:p></p> <p class="MsoNormal">2018.01.16 14:38:19 \
LOG5[60]: Service [fasthosts-smtp] accepted connection from \
10.226.174.95:11483<o:p></o:p></p> <p class="MsoNormal">2018.01.16 14:38:19 LOG5[60]: \
s_connect: connected 213.171.216.50:465<o:p></o:p></p> <p \
class="MsoNormal">2018.01.16 14:38:19 LOG5[60]: Service [fasthosts-smtp] connected \
remote server from 10.226.150.9:52620<o:p></o:p></p> <p class="MsoNormal">2018.01.16 \
14:38:19 LOG5[60]: OCSP: Connecting the AIA responder \
"http://t2.symcb.com"<o:p></o:p></p> <p class="MsoNormal">2018.01.16 \
14:38:19 LOG5[60]: s_connect: connected 23.55.155.27:80<o:p></o:p></p> <p \
class="MsoNormal">2018.01.16 14:38:19 LOG5[60]: OCSP: Certificate \
accepted<o:p></o:p></p> <p class="MsoNormal">2018.01.16 14:38:19 LOG5[60]: OCSP: \
Connecting the AIA responder "http://tj.symcd.com"<o:p></o:p></p> <p \
class="MsoNormal">2018.01.16 14:38:19 LOG5[60]: s_connect: connected \
23.55.155.27:80<o:p></o:p></p> <p class="MsoNormal">2018.01.16 14:38:19 LOG5[60]: \
OCSP: Certificate accepted<o:p></o:p></p> <p class="MsoNormal">2018.01.16 14:38:19 \
LOG5[60]: Certificate accepted at depth=0: C=GB, ST=Gloucestershire, L=Gloucester, \
O=Fasthosts Internet Limited, OU=NOC, CN=smtp.livemail.co.uk<o:p></o:p></p> <p \
class="MsoNormal">2018.01.16 14:38:24 LOG3[60]: TLS socket closed (SSL_write) with \
418 unsent byte(s)<o:p></o:p></p> <p class="MsoNormal">2018.01.16 14:38:24 LOG5[60]: \
Connection reset: 964 byte(s) sent to TLS, 392 byte(s) sent to socket<o:p></o:p></p> \
<p class="MsoNormal"><o:p> </o:p></p> <p class="MsoNormal">Has anyone come \
across this before?<o:p></o:p></p> <p class="MsoNormal">Our mail provider has send \
limits in place of 50 every 10 minutes, but I am confident we are not reaching those \
amounts.<o:p></o:p></p> <p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any help appreciated.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards, Stephen<o:p></o:p></p>
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