stunnel-users

3306 discussions

Stunnel 4.56 and FIPS
by Ondrej Hrebicek 09 Jul '13

09 Jul '13

Hello stunnel users, I'm trying to compile stunnel 4.56 with FIPS support on Ubuntu 12.04. Always end up with the infamous "fingerprint does not match" error. I can't figure out what I'm doing wrong. 1. Download openssl-fips-2.0.2.tar.gz, unpack, ./config, make, and sudo make install (as specified in http://www.openssl.org/docs/fips/UserGuide-2.0.pdf) 2. Download openssl-1.0.1e.tar.gz, unpack, ./config fips --with-fipslibdir=/usr/local/ssl/fips-2.0/lib/ --with-fipsdir=/usr/local/ssl/fips-2.0/, make depend, make, and sudo make install 3. At this point, openssl is working in FIPS mode: > OPENSSL_FIPS=1 /usr/local/ssl/bin/openssl version OpenSSL 1.0.1e-fips 11 Feb 2013 > OPENSSL_FIPS=1 /usr/local/ssl/bin/openssl sha1 c_rehash SHA1(c_rehash)= 5af9e1479950bbbd9d3304c181b3f802c54f64fd > OPENSSL_FIPS=1 /usr/local/ssl/bin/openssl md5 c_rehash Error setting digest md5 139806582736544:error:060A80A3:digital envelope routines:FIPS_DIGESTINIT:disabled for fips:fips_md.c:180: 4. Download stunnel-4.56.tar.gz, unpack, ./configure --enable-fips --with-ssl=/usr/local/ssl, make, and sudo make install 5. While configuring and building stunnel completes as expected, the following does appear in ./configure's output: checking whether to enable FIPS mode support... yes configure: **************************************** SSL checking for SSL directory... /usr/local/ssl checking /usr/local/ssl/include/openssl/engine.h usability... yes checking /usr/local/ssl/include/openssl/engine.h presence... yes checking for /usr/local/ssl/include/openssl/engine.h... yes checking /usr/local/ssl/include/openssl/ocsp.h usability... yes checking /usr/local/ssl/include/openssl/ocsp.h presence... yes checking for /usr/local/ssl/include/openssl/ocsp.h... yes checking /usr/local/ssl/include/openssl/fips.h usability... no checking /usr/local/ssl/include/openssl/fips.h presence... no checking for /usr/local/ssl/include/openssl/fips.h... no configure: WARNING: OpenSSL fips header not found This is not entirely unexpected as fips.h only exists in /usr/local/ssl/fips-2.0/include/openssl. 6. Running stunnel however fails: > /usr/local/bin/stunnel Clients allowed=500 stunnel 4.56 on x86_64-unknown-linux-gnu platform Compiled/running with OpenSSL 1.0.1e-fips 11 Feb 2013 Threading:PTHREAD Sockets:POLL,IPv6 SSL:ENGINE,OCSP,FIPS Reading configuration from file /usr/local/etc/stunnel/stunnel.conf FIPS_mode_set: 2D06B06F: error:2D06B06F:FIPS routines:FIPS_check_incore_fingerprint:fingerprint does not match Line 61: "[pop3s]": Failed to initialize SSL str_stats: 5 block(s), 120 data byte(s), 290 control byte(s) I can't figure out what's causing this, hoping someone on the list may have a couple suggestions. Thanks in advance!

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Re: [stunnel-users] is verify level 4 working?
by Thomas Eifert 08 Jul '13

08 Jul '13

dansmith, I'd be the last to argue with you. Purely as an experiment, I tried changing the verify level from 4 to 3, but it didn't fly. I most likely missed the entirety of the signing chain, as I only added the certificate of the *issuing* CA. Regards, Thomas On 7/8/2013 7:01 PM, dansmith wrote: > Thomas, the recent exception you are describing - needing a CA > sertificate and server certificate is what verify=3 does. > So, I guess there is some regression in the code. > When I look at stunnel's verify.c code, there is only one reference to > level 4 in line 225. It seems like verify=4 functionality is missing > from the code. > > On 07/08/2013 11:44 PM, Thomas Eifert wrote: >> dansmith, >> >> It's my understanding that verify = 4 should, theoretically, look only >> for the server certificate, and this is the way I've been using it >> with great success over the past year or so. Recently, however, I ran >> into an exception to that behavior. >> >> In my case, I only had to download and install one certificate; that >> of the signing CA. I simply pasted it directly below the server >> certificate in the associated .pem file. The CA certificate wasn't >> originally in .pem format, so I converted it beforehand. OpenSSL has >> conversion capability, and there are also online certificate tools >> available. Your mileage may vary. >> >> Good luck. >> >> Thomas >> >> >> On 7/8/2013 3:01 PM, dansmith wrote: >> >>> Could you kindly break it down for me. Are you saying that I need to >>> have two CAs A & B. A signs the certificate of B and B signs the >>> certificate of my server? >>> Do I understand correctly that verify=4 is supposed to simply ignore >> any >>> CAs and only look at the actual certificate, comparing it to the >>> certificate in CAfile ? >>> >>> >>> On 07/08/2013 06:32 PM, Thomas Eifert wrote: >>>> You're not missing anything. I've experienced a similar issue. While >>>> verify = 4 generally works well in most cases and will ignore the CA >>>> chain, I've encountered a few isolated incidences in which I've had to >>>> append or "chain" the server certificate with the certificate of the >>>> CA. Give it a shot and see if it resolves your issue. >>>> >>>> Thomas >>>> >>>> On 7/8/2013 3:02 AM, dansmith wrote: >>>>> I would expect that level 4 only compares locally installed >>>>> certificates, however I get the same behaviour as with level 3, >> stunnel >>>>> expects a CA cert. >>>>> Here'e the relevant log when on level 4 >>>>> >>>>> Jul 6 23:46:31 mmm stunnel: LOG7[7870:140491349628672]: Starting >>>>> certificate verification: depth=0, >>>>> /C=qq/ST=qq/O=qqq/OU=rer/CN=redf/emailAddress=rfd >>>>> Jul 6 23:46:31 mmm stunnel: LOG4[7870:140491349628672]: CERT: >>>>> Verification error: unable to get local issuer certificate >>>>> Jul 6 23:46:31 mmm stunnel: LOG4[7870:140491349628672]: Certificate >>>>> check failed: depth=0, >> /C=qq/ST=qq/O=qqq/OU=rer/CN=redf/emailAddress=rfd >>>>> Jul 6 23:46:31 mmm stunnel: LOG7[7872:140080853112576]: SSL alert >>>>> (read): fatal: unknown CA >>>>> >>>>> What am I missing in understanding verify's level 4 ? >>>>> >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> stunnel-users mailing list >>>>> stunnel-users(a)stunnel.org >>>>> https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users >>>>> >>>> >>> >>> >> > > -- Attention: This message and all attachments are private and may contain information that is confidential and privileged. If you received this message in error, please notify the sender by reply email and delete the message immediately.

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is verify level 4 working?
by Thomas Eifert 08 Jul '13

08 Jul '13

dansmith, It's my understanding that verify = 4 should, theoretically, look only for the server certificate, and this is the way I've been using it with great success over the past year or so. Recently, however, I ran into an exception to that behavior. In my case, I only had to download and install one certificate; that of the signing CA. I simply pasted it directly below the server certificate in the associated .pem file. The CA certificate wasn't originally in .pem format, so I converted it beforehand. OpenSSL has conversion capability, and there are also online certificate tools available. Your mileage may vary. Good luck. Thomas On 7/8/2013 3:01 PM, dansmith wrote: > Could you kindly break it down for me. Are you saying that I need to > have two CAs A & B. A signs the certificate of B and B signs the > certificate of my server? > Do I understand correctly that verify=4 is supposed to simply ignore any > CAs and only look at the actual certificate, comparing it to the > certificate in CAfile ? > > > On 07/08/2013 06:32 PM, Thomas Eifert wrote: >> You're not missing anything. I've experienced a similar issue. While >> verify = 4 generally works well in most cases and will ignore the CA >> chain, I've encountered a few isolated incidences in which I've had to >> append or "chain" the server certificate with the certificate of the >> CA. Give it a shot and see if it resolves your issue. >> >> Thomas >> >> On 7/8/2013 3:02 AM, dansmith wrote: >>> I would expect that level 4 only compares locally installed >>> certificates, however I get the same behaviour as with level 3, stunnel >>> expects a CA cert. >>> Here'e the relevant log when on level 4 >>> >>> Jul 6 23:46:31 mmm stunnel: LOG7[7870:140491349628672]: Starting >>> certificate verification: depth=0, >>> /C=qq/ST=qq/O=qqq/OU=rer/CN=redf/emailAddress=rfd >>> Jul 6 23:46:31 mmm stunnel: LOG4[7870:140491349628672]: CERT: >>> Verification error: unable to get local issuer certificate >>> Jul 6 23:46:31 mmm stunnel: LOG4[7870:140491349628672]: Certificate >>> check failed: depth=0, /C=qq/ST=qq/O=qqq/OU=rer/CN=redf/emailAddress=rfd >>> Jul 6 23:46:31 mmm stunnel: LOG7[7872:140080853112576]: SSL alert >>> (read): fatal: unknown CA >>> >>> What am I missing in understanding verify's level 4 ? >>> >>> >>> >>> >>> _______________________________________________ >>> stunnel-users mailing list >>> stunnel-users(a)stunnel.org >>> https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users >>> >> > > -- Attention: This message and all attachments are private and may contain information that is confidential and privileged. If you received this message in error, please notify the sender by reply email and delete the message immediately. -- Attention: This message and all attachments are private and may contain information that is confidential and privileged. If you received this message in error, please notify the sender by reply email and delete the message immediately.

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Re: [stunnel-users] accept : too many open files error(24)
by Senthil Naidu 01 Jul '13

01 Jul '13

Hi, We are using 64 bit version of centos, and the ram of this system is 1gb so should we increase this limit to 100000 in the limits.conf Regards senthil On Sun, Jun 30, 2013 at 12:31 AM, Michael Curran <mike_curran(a)hotmail.com>wrote: > Are you running 32-kernel for centos? > > 32-bit limits in the 4500 range for open connections due to the memory > constraints > > We usually set our open file limits to 100I specifically for Stunnel user > > *Sent from my Verizon Wireless 4G LTE DROID* > > > Senthil Naidu <senthil.naidu(a)gmail.com> wrote: > > Hi > > > > We are using stunnel 4.32 on centos and our ulimits in limits.conf are as > follows > > > > * soft nofile 16384 > > * hard nofile 65536 > > > > We keep getting the error “too many open files(24)” and stunnel does not > accept new connection till we restart the same > > > > Is this ulimit proper or we need to increase the same , we are look for > 3000 to 5000 connections > > > > Regards > > Senthil >

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accept : too many open files error(24)
by Senthil Naidu 29 Jun '13

29 Jun '13

Hi We are using stunnel 4.32 on centos and our ulimits in limits.conf are as follows * soft nofile 16384 * hard nofile 65536 We keep getting the error “too many open files(24)” and stunnel does not accept new connection till we restart the same Is this ulimit proper or we need to increase the same , we are look for 3000 to 5000 connections Regards Senthil

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Re: [stunnel-users] Sending Email Without Authentication with gmail
by Stephen Gates 28 Jun '13

28 Jun '13

I downloaded the old argosoft freeware and it works! Praise God! Thanks to all for your time, help and suggestions!! Much appreciated. Stephen Gates Harold K. Scholz Company 7800 Serum Avenue Ralston, NE 68127 402-339-7600

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Re: [stunnel-users] Sending Email from PLC Without Authentication with gmail - static ip/argosoft/php script
by Stephen Gates 28 Jun '13

28 Jun '13

> The only limitation I can recall on this freeware version is in the file size (5MB) and in the retries between relay errors. > > But you have to be aware when using a mail server that, thanks to Spamhaus, you need a static IP or almost all SMTPs out there will block your server to accept mail from (including Gmail)." > The router that my network is connected to has a static IP as far as I can tell and so does the PC and PLC on the LAN. How can I determine for sure if I have a static IP? I will try the Argosoft link. > Question? What does this device have available for resources. I use a php script that checks server status emails via gmail when there are changes in status, and it handles the connection directly to gmail. > I'm not sure. I don't know what php script is. I am about to try emailrelay from sourceforge.net. Anybody have experience with that? http://emailrelay.sourceforge.net/ Thanks, Stephen Gates Harold K. Scholz Company 7800 Serum Avenue Ralston, NE 68127 402-339-7600

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Re: [stunnel-users] Sending Email from PLC Without Authentication with gmail
by Stephen Gates 27 Jun '13

27 Jun '13

"The issue with your situation is not stunnel but the fact that your SMTP client does not have the capability to provide authentication. As you mentioned, Gmail will require authentication information from the client. If that information is not provided by the SMTP client application, then the SMTP transaction will fail. ? I would suggest you consider setting up some kind of SMTP Relay. Which will serve as a proxy between your PLC and Google SMTP servers. ? You can also take a look at this document and if possible implement the last approach? http://support.google.com/a/bin/answer.py?hl=en <http://support.google.com/a/bin/answer.py?hl=en&answer=176600> &answer=176600" Thanks for your help Leandro. Do you have a suggestion for a SMTP Relay?? I have tried Free SMTP Server which was the only thing that has worked so far and worked almost perfectly except that it can only send out 10 emails a day. And I need more capacity for sending than that. I also have used trial versions of ArgoSoft, 1st Mail Server and QK SMTP Server but couldn't get those to work. I have tried the Google suggestion for using asmpx.l.google.com but I need to send to vtext.com addresses which are outside of the google domain. I tried adding the vtext.com addresses to googlegroups.com and sending emails using the asmpx.l.google.com server but vtext did not receive the emails for googlegroups.com. So I'm desperate to find some sort of solution. Thanks, Stephen Gates Harold K. Scholz Company 7800 Serum Avenue Ralston, NE 68127 402-339-7600

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Stunnel | connection reset by peer
by Prem Vikash Upadhyay 27 Jun '13

27 Jun '13

Hi, Is there any configuration that can be used, to change the 'connection reset by peer' to 'connection refused'?. In our setup we are using day cq dispatcher with sticky session enabled, but dispatcher is invalidating sticky session only when it receiving error as 'connection refused', while stunnel is always sending error as 'connection reset by peer', whenever the connect server is down/crashed. Thanks Prem

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Sending Email from PLC Without Authentication with gmail
by Stephen Gates 27 Jun '13

27 Jun '13

A customer needs to send emails from a Programmable Logic Controller (PLC) which cannot provide authentication. The customer's email server is gmail which obviously requires authentication. The PLC IP is 192.168.1.2 and the PC IP on which stunnel is installed is 192.168.1.31 My config is: cert = stunnel.pem [smtps] client = yes accept = 25 connect = smtp.gmail.com:465 The PLC is set up to send emails to the IP of the PC 192.168.1.31 When I try to send emails I get the following in the stunnel log: 2013.06.26 14:26:30 LOG5[12384:13048]: Service [smtps] accepted connection from 192.168.1.2:2938 2013.06.26 14:26:30 LOG5[12384:13048]: connect_blocking: connected 74.125.130.108:465 2013.06.26 14:26:30 LOG5[12384:13048]: Service [smtps] connected remote server from 192.168.1.31:53599 Any help would be greatly appreciated! Stephen Gates Harold K. Scholz Company 7800 Serum Avenue Ralston, NE 68127 402-339-7600

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