January 2018 - stunnel-users

Connecting a HTTP browser to a HTTPS server.
by peter＠easthope.ca 12 Jan '18

12 Jan '18

Hello, I'm interested to configure stunnel to allow my local non-TLS Web browser to receive pages from a remote server providing only HTTPS. This section of https://www.stunnel.org/static/stunnel.html appears relevant. transparent = none | source | destination | both (Unix only) enable transparent proxy support on selected platforms ... destination The original destination is used instead of the connect option. A service section for transparent destination may look like this: [transparent] client = yes accept = <stunnel_port> transparent = destination This configuration requires iptables setup to work, possibly in /etc/rc.local or equivalent file. ... For a connect target installed on a remote host: /sbin/iptables -I INPUT -i eth0 -p tcp --dport <stunnel_port> -j ACCEPT /sbin/iptables -t nat -I PREROUTING -p tcp --dport <redirected_port> \ -i eth0 -j DNAT --to-destination <local_ip>:<stunnel_port> The transparent destination option is currently only supported on Linux. ==================================== Substitution of parameters for my context gives these configurations.. [transparent] client = yes accept = 127.0.0.1:954 transparent = destination /sbin/iptables -I INPUT -i eth0 -p tcp --dport 954 -j ACCEPT /sbin/iptables -t nat -I PREROUTING -p tcp --dport 443 \ -i eth0 -j DNAT --to-destination 127.0.0.1:954 The non-TLS browser would address http://www.stunnel.org:954/ and receive the page from https://www.stunnel.org:443/. According to Wikipedia, 954 is not assigned. The browser would continue to receive the page http://www.website.org/ without involvement of stunnel or iptables. Plausible? Thanks, ... P. -- 123456789 123456789 123456789 123456789 123456789 123456789 123456789 Tel: +1 360 639 0202 Pender Is.: +1 250 629 3757 http://easthope.ca/Peter.html Bcc: peter at easthope. ca

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Versions
by Editor 04 Jan '18

04 Jan '18

Hi: On the various repo sites for Redhat-CentOS-Oracle Linux, etc., they are only providing version 4.29 of stunnel. Is there anyway to push them an updated version? I normally use these repo providers: Oracle Linux repo EPEL 6 Repo rpmforce Repo In the end, I tried to compile the latest version on Linux but I get this somewhat cryptic message about a TLS installation directory. I never had this issue before but to be honest, I normally used Solaris (8-9-10) in the past. "Could not find your TLS library installation dir Use --with-ssl option to fix this problem" I tried pointing it at /usr/bin/openssl and also at /usr/lib64/openssl without any luck. Sorry for bothering the list if this has been answered in the past. Thanks. Kevin

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Re: [stunnel-users] outgoing mail solution?
by Parker Brooks 02 Jan '18

02 Jan '18

Douglas, it worked! Thank you! I had not turned on gmail's allow less secure apps, so my first try netted this 2018.01.02 09:00:27 LOG5[main]: stunnel 5.44 on x86-pc-msvc-1500 platform 2018.01.02 09:00:27 LOG5[main]: Compiled/running with OpenSSL 1.0.2m-fips 2 Nov 2017 2018.01.02 09:00:27 LOG5[main]: Threading:WIN32 Sockets:SELECT,IPv6 TLS:ENGINE,FIPS,OCSP,PSK,SNI 2018.01.02 09:00:27 LOG5[main]: Reading configuration from file stunnel.conf 2018.01.02 09:00:27 LOG5[main]: UTF-8 byte order mark not detected 2018.01.02 09:00:27 LOG5[main]: FIPS mode disabled 2018.01.02 09:00:27 LOG5[main]: Configuration successful 2018.01.02 09:03:09 LOG5[0]: Service [gmail-smtp] accepted connection from 127.0.0.1:1046 2018.01.02 09:03:09 LOG5[0]: s_connect: connected 173.194.78.108:587 2018.01.02 09:03:09 LOG5[0]: Service [gmail-smtp] connected remote server from 192.168.1.103:1047 2018.01.02 09:03:09 LOG5[0]: OCSP: Connecting the AIA responder " http://ocsp.pki.goog/gsr2" 2018.01.02 09:03:10 LOG5[0]: s_connect: connected 172.217.12.78:80 2018.01.02 09:03:10 LOG5[0]: OCSP: Certificate accepted 2018.01.02 09:03:10 LOG5[0]: OCSP: Connecting the AIA responder " http://ocsp.pki.goog/GTSGIAG3" 2018.01.02 09:03:10 LOG5[0]: s_connect: connected 172.217.12.78:80 2018.01.02 09:03:10 LOG5[0]: OCSP: Certificate accepted 2018.01.02 09:03:10 LOG5[0]: Certificate accepted at depth=0: C=US, ST=California, L=Mountain View, O=Google Inc, CN=smtp.gmail.com 2018.01.02 09:03:10 LOG3[0]: PLAIN Authentication Failed 2018.01.02 09:03:10 LOG5[0]: Connection reset: 0 byte(s) sent to TLS, 0 byte(s) sent to socket my monitoring s/w showed To = xxxxxx(a)gmail.com Connecting to mail server... 127.0.0.1 E-mail Failed. Error: 25058 / [10057] Socket is not connected 1/2/2018 9:03:10 AM there was a security alert from gmail with the instructions to enabling the less secure apps. turned it on and tried again... 2018.01.02 09:17:45 LOG5[1]: Service [gmail-smtp] accepted connection from 127.0.0.1:1050 2018.01.02 09:17:45 LOG5[1]: s_connect: connected 173.194.78.109:587 2018.01.02 09:17:45 LOG5[1]: Service [gmail-smtp] connected remote server from 192.168.1.103:1051 2018.01.02 09:17:47 LOG5[1]: Connection closed: 306 byte(s) sent to TLS, 508 byte(s) sent to socket again, thank you! On Tue, Jan 2, 2018 at 7:35 AM, Harris, Douglas (SSC/SPC) < douglas.harris(a)canada.ca> wrote: > Try this… > > > > [gmail-smtp] > > client = yes > > accept = 127.0.0.1:25 > > connect = smtp.gmail.com:587 <http://smtp.gmail.com:465> > > verifyChain = yes > > CAfile = ca-certs.pem > > checkHost = smtp.gmail.com > > OCSPaia = yes > > protocol = smtp > > protocolUsername = [your gmail userid] > > protocolPassword = [your gmail password] > > > > > > > > > > *From:* stunnel-users [mailto:stunnel-users-bounces@stunnel.org] *On > Behalf Of *Parker Brooks > *Sent:* January 2, 2018 12:34 AM > *To:* stunnel-users(a)stunnel.org > *Subject:* [stunnel-users] outgoing mail solution? > > > > hello and happy new year! > > > > it seemed this question has been asked before in various ways, however > with the frequent version updates i'm still unclear if stunnel is meant as > a fix to my issue. > > > > i have a outdated home monitoring program running on a winxp box. when an > error occurs it sends an email. it's setup screen (besides the destination > email field) only have a) smtp server, b) undeliverable email address and > c) port # fields to configure. > > > > my workaround for several years (when port 25 became blocked or needed > authetication) has been to use LOApost but they've recently ceased. that > program, also running in the background, and if i understand correctly > acted as a local host. i configured the monitoring program's smtp for > 127.0.0.1 and LOApost did the rest > > > > other searches suggest cloud solutions like sendgrid and authsmtp. but > those sites need a login/ password with the outgoing message. perhaps this > is where i'm getting confused between the differences of SSL and smtp > authentication? > > > > i have gotten gsuite's restricted smtp server to work, but i hoped stunnel > would provide a better solution (ability to send besides gmail/ gsuite > addresses). > > > > below are my conf and log files of my attempt. again, i can't tell if i've > missed a step, or if this is not intended to work. > > > > PS: i've also tried to understand if this feature is on the todo list? > > tia, > > parker > > > > stunnel.conf > > > > [gmail-pop3] > > client = yes > > accept = 127.0.0.1:110 > > connect = pop.gmail.com:995 > > verifyChain = yes > > CAfile = ca-certs.pem > > checkHost = pop.gmail.com > > OCSPaia = yes > > > > [gmail-imap] > > client = yes > > accept = 127.0.0.1:143 > > connect = imap.gmail.com:993 > > verifyChain = yes > > CAfile = ca-certs.pem > > checkHost = imap.gmail.com > > OCSPaia = yes > > > > [gmail-smtp] > > client = yes > > accept = 127.0.0.1:25 > > connect = smtp.gmail.com:465 > > verifyChain = yes > > CAfile = ca-certs.pem > > checkHost = smtp.gmail.com > > OCSPaia = yes > > > > log file > > > > 2017.12.31 16:22:45 LOG5[main]: stunnel 5.44 on x86-pc-msvc-1500 platform > > 2017.12.31 16:22:45 LOG5[main]: Compiled/running with OpenSSL 1.0.2m-fips > 2 Nov 2017 > > 2017.12.31 16:22:45 LOG5[main]: Threading:WIN32 Sockets:SELECT,IPv6 > TLS:ENGINE,FIPS,OCSP,PSK,SNI > > 2017.12.31 16:22:45 LOG5[main]: Reading configuration from file > stunnel.conf > > 2017.12.31 16:22:45 LOG5[main]: UTF-8 byte order mark not detected > > 2017.12.31 16:22:45 LOG5[main]: FIPS mode disabled > > 2017.12.31 16:22:45 LOG5[main]: Configuration successful > > 2017.12.31 16:25:03 LOG5[0]: Service [gmail-smtp] accepted connection from > 127.0.0.1:1141 > > 2017.12.31 16:25:03 LOG5[0]: s_connect: connected 173.194.67.108:465 > > 2017.12.31 16:25:03 LOG5[0]: Service [gmail-smtp] connected remote server > from 192.168.1.103:1142 > > 2017.12.31 16:25:03 LOG5[0]: OCSP: Connecting the AIA responder " > http://ocsp.pki.goog/gsr2" > > 2017.12.31 16:25:04 LOG5[0]: s_connect: connected 172.217.14.174:80 > > 2017.12.31 16:25:04 LOG5[0]: OCSP: Certificate accepted > > 2017.12.31 16:25:04 LOG5[0]: OCSP: Connecting the AIA responder " > http://ocsp.pki.goog/GTSGIAG3" > > 2017.12.31 16:25:04 LOG5[0]: s_connect: connected 172.217.14.174:80 > > 2017.12.31 16:25:04 LOG5[0]: OCSP: Certificate accepted > > 2017.12.31 16:25:04 LOG5[0]: Certificate accepted at depth=0: C=US, > ST=California, L=Mountain View, O=Google Inc, CN=smtp.gmail.com > > 2017.12.31 16:25:04 LOG5[0]: Connection closed: 55 byte(s) sent to TLS, > 514 byte(s) sent to socket > > > > > > and this is what shows up on my monitoring program log file... > > > > To = xxxxxx(a)gmail.com > > Connecting to mail server... 127.0.0.1 > > Sending message... > > E-mail Failed. Error: 20162 / 530 5.5.1 https://support.google.com/ > mail/?p=WantAuthError 51sm9558225oti.10 - gsmtp > > 12/31/2017 4:25:04 PM >

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Re: [stunnel-users] outgoing mail solution?
by Josealf.rm 02 Jan '18

02 Jan '18

Cool! I was not aware that stunnel fully supported SMTP authentication. Thanks Parker! Saludos Jose Alfredo Diaz > On Jan 2, 2018, at 8:35 AM, Harris, Douglas (SSC/SPC) <douglas.harris(a)canada.ca> wrote: > > Try this… > > [gmail-smtp] > client = yes > accept = 127.0.0.1:25 > connect = smtp.gmail.com:587 > verifyChain = yes > CAfile = ca-certs.pem > checkHost = smtp.gmail.com > OCSPaia = yes > protocol = smtp > protocolUsername = [your gmail userid] > protocolPassword = [your gmail password] > > > > > From: stunnel-users [mailto:stunnel-users-bounces@stunnel.org] On Behalf Of Parker Brooks > Sent: January 2, 2018 12:34 AM > To: stunnel-users(a)stunnel.org > Subject: [stunnel-users] outgoing mail solution? > > hello and happy new year! > > it seemed this question has been asked before in various ways, however with the frequent version updates i'm still unclear if stunnel is meant as a fix to my issue. > > i have a outdated home monitoring program running on a winxp box. when an error occurs it sends an email. it's setup screen (besides the destination email field) only have a) smtp server, b) undeliverable email address and c) port # fields to configure. > > my workaround for several years (when port 25 became blocked or needed authetication) has been to use LOApost but they've recently ceased. that program, also running in the background, and if i understand correctly acted as a local host. i configured the monitoring program's smtp for 127.0.0.1 and LOApost did the rest > > other searches suggest cloud solutions like sendgrid and authsmtp. but those sites need a login/ password with the outgoing message. perhaps this is where i'm getting confused between the differences of SSL and smtp authentication? > > i have gotten gsuite's restricted smtp server to work, but i hoped stunnel would provide a better solution (ability to send besides gmail/ gsuite addresses). > > below are my conf and log files of my attempt. again, i can't tell if i've missed a step, or if this is not intended to work. > > PS: i've also tried to understand if this feature is on the todo list? > tia, > parker > > stunnel.conf > > [gmail-pop3] > client = yes > accept = 127.0.0.1:110 > connect = pop.gmail.com:995 > verifyChain = yes > CAfile = ca-certs.pem > checkHost = pop.gmail.com > OCSPaia = yes > > [gmail-imap] > client = yes > accept = 127.0.0.1:143 > connect = imap.gmail.com:993 > verifyChain = yes > CAfile = ca-certs.pem > checkHost = imap.gmail.com > OCSPaia = yes > > [gmail-smtp] > client = yes > accept = 127.0.0.1:25 > connect = smtp.gmail.com:465 > verifyChain = yes > CAfile = ca-certs.pem > checkHost = smtp.gmail.com > OCSPaia = yes > > log file > > 2017.12.31 16:22:45 LOG5[main]: stunnel 5.44 on x86-pc-msvc-1500 platform > 2017.12.31 16:22:45 LOG5[main]: Compiled/running with OpenSSL 1.0.2m-fips 2 Nov 2017 > 2017.12.31 16:22:45 LOG5[main]: Threading:WIN32 Sockets:SELECT,IPv6 TLS:ENGINE,FIPS,OCSP,PSK,SNI > 2017.12.31 16:22:45 LOG5[main]: Reading configuration from file stunnel.conf > 2017.12.31 16:22:45 LOG5[main]: UTF-8 byte order mark not detected > 2017.12.31 16:22:45 LOG5[main]: FIPS mode disabled > 2017.12.31 16:22:45 LOG5[main]: Configuration successful > 2017.12.31 16:25:03 LOG5[0]: Service [gmail-smtp] accepted connection from 127.0.0.1:1141 > 2017.12.31 16:25:03 LOG5[0]: s_connect: connected 173.194.67.108:465 > 2017.12.31 16:25:03 LOG5[0]: Service [gmail-smtp] connected remote server from 192.168.1.103:1142 > 2017.12.31 16:25:03 LOG5[0]: OCSP: Connecting the AIA responder "http://ocsp.pki.goog/gsr2" > 2017.12.31 16:25:04 LOG5[0]: s_connect: connected 172.217.14.174:80 > 2017.12.31 16:25:04 LOG5[0]: OCSP: Certificate accepted > 2017.12.31 16:25:04 LOG5[0]: OCSP: Connecting the AIA responder "http://ocsp.pki.goog/GTSGIAG3" > 2017.12.31 16:25:04 LOG5[0]: s_connect: connected 172.217.14.174:80 > 2017.12.31 16:25:04 LOG5[0]: OCSP: Certificate accepted > 2017.12.31 16:25:04 LOG5[0]: Certificate accepted at depth=0: C=US, ST=California, L=Mountain View, O=Google Inc, CN=smtp.gmail.com > 2017.12.31 16:25:04 LOG5[0]: Connection closed: 55 byte(s) sent to TLS, 514 byte(s) sent to socket > > > and this is what shows up on my monitoring program log file... > > To = xxxxxx(a)gmail.com > Connecting to mail server... 127.0.0.1 > Sending message... > E-mail Failed. Error: 20162 / 530 5.5.1 https://support.google.com/mail/?p=WantAuthError 51sm9558225oti.10 - gsmtp > 12/31/2017 4:25:04 PM > _______________________________________________ > stunnel-users mailing list > stunnel-users(a)stunnel.org > https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users

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outgoing mail solution?
by Parker Brooks 02 Jan '18

02 Jan '18

hello and happy new year! it seemed this question has been asked before in various ways, however with the frequent version updates i'm still unclear if stunnel is meant as a fix to my issue. i have a outdated home monitoring program running on a winxp box. when an error occurs it sends an email. it's setup screen (besides the destination email field) only have a) smtp server, b) undeliverable email address and c) port # fields to configure. my workaround for several years (when port 25 became blocked or needed authetication) has been to use LOApost but they've recently ceased. that program, also running in the background, and if i understand correctly acted as a local host. i configured the monitoring program's smtp for 127.0.0.1 and LOApost did the rest other searches suggest cloud solutions like sendgrid and authsmtp. but those sites need a login/ password with the outgoing message. perhaps this is where i'm getting confused between the differences of SSL and smtp authentication? i have gotten gsuite's restricted smtp server to work, but i hoped stunnel would provide a better solution (ability to send besides gmail/ gsuite addresses). below are my conf and log files of my attempt. again, i can't tell if i've missed a step, or if this is not intended to work. PS: i've also tried to understand if this feature is on the todo list? tia, parker stunnel.conf [gmail-pop3] client = yes accept = 127.0.0.1:110 connect = pop.gmail.com:995 verifyChain = yes CAfile = ca-certs.pem checkHost = pop.gmail.com OCSPaia = yes [gmail-imap] client = yes accept = 127.0.0.1:143 connect = imap.gmail.com:993 verifyChain = yes CAfile = ca-certs.pem checkHost = imap.gmail.com OCSPaia = yes [gmail-smtp] client = yes accept = 127.0.0.1:25 connect = smtp.gmail.com:465 verifyChain = yes CAfile = ca-certs.pem checkHost = smtp.gmail.com OCSPaia = yes log file 2017.12.31 16:22:45 LOG5[main]: stunnel 5.44 on x86-pc-msvc-1500 platform 2017.12.31 16:22:45 LOG5[main]: Compiled/running with OpenSSL 1.0.2m-fips 2 Nov 2017 2017.12.31 16:22:45 LOG5[main]: Threading:WIN32 Sockets:SELECT,IPv6 TLS:ENGINE,FIPS,OCSP,PSK,SNI 2017.12.31 16:22:45 LOG5[main]: Reading configuration from file stunnel.conf 2017.12.31 16:22:45 LOG5[main]: UTF-8 byte order mark not detected 2017.12.31 16:22:45 LOG5[main]: FIPS mode disabled 2017.12.31 16:22:45 LOG5[main]: Configuration successful 2017.12.31 16:25:03 LOG5[0]: Service [gmail-smtp] accepted connection from 127.0.0.1:1141 2017.12.31 16:25:03 LOG5[0]: s_connect: connected 173.194.67.108:465 2017.12.31 16:25:03 LOG5[0]: Service [gmail-smtp] connected remote server from 192.168.1.103:1142 2017.12.31 16:25:03 LOG5[0]: OCSP: Connecting the AIA responder " http://ocsp.pki.goog/gsr2" 2017.12.31 16:25:04 LOG5[0]: s_connect: connected 172.217.14.174:80 2017.12.31 16:25:04 LOG5[0]: OCSP: Certificate accepted 2017.12.31 16:25:04 LOG5[0]: OCSP: Connecting the AIA responder " http://ocsp.pki.goog/GTSGIAG3" 2017.12.31 16:25:04 LOG5[0]: s_connect: connected 172.217.14.174:80 2017.12.31 16:25:04 LOG5[0]: OCSP: Certificate accepted 2017.12.31 16:25:04 LOG5[0]: Certificate accepted at depth=0: C=US, ST=California, L=Mountain View, O=Google Inc, CN=smtp.gmail.com 2017.12.31 16:25:04 LOG5[0]: Connection closed: 55 byte(s) sent to TLS, 514 byte(s) sent to socket and this is what shows up on my monitoring program log file... To = xxxxxx(a)gmail.com Connecting to mail server... 127.0.0.1 Sending message... E-mail Failed. Error: 20162 / 530 5.5.1 https://support.google.com/ mail/?p=WantAuthError 51sm9558225oti.10 - gsmtp 12/31/2017 4:25:04 PM

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