- stunnel-users - stunnel.org

Stunnel Return Codes - How do I see them in a batch file?
by Robert Lambrecht 10 Oct '07

10 Oct '07

I have Stunnel working successfully in a batch file. I would like to write the error codes in case there is an issue. How do you do this? In Windows, I could do something like: "C:\Program Files\stunnel\stunnel.exe" -start -quiet stunnel.conf goto %errorlevel% :0 :: Normal Return - Complete Batch Process goto :EOF :1 :: Errors - Log them Would this work or how do I get the stunnel return codes? Bob

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Wildcard usage
by Knight Tiger 08 Oct '07

08 Oct '07

Hi, I am new to STUNNEL and I find it very useful for what I am doing right now. I would like to know if STUNNEL does support the functionality I require. I shall describe the situation below. I run a SIP messaging server (SIP is a VoIP protocol used to establish voice calls over the Internet). STUNNEL is running on the same machine as the SIP server. The SIP server listens on a specific port say 8000 so I have in the config file [sip-new] accept = 10000 connect = localhost:8000 and it works beautifully as the client sends the message through a SSL connection to port 10000 on the machine. So far so good. Now I need the server to send a message to the client. SIP server -----> STUNNEL ------> client . Here STUNNEL acts as a SSL client and the client acts as the SSL server. (Both the client and STUNNEL support this functionality), so in the config file I have [sip-client] accept = 11000 connect = ?:8000 How can I code in the client IP address (I know the port number where the client's SSL server is listening on) when I dont know the client IP address before hand ? (The client is typically assigned IP address by a DHCP server) and I will have more than one client which would be acting as a server. The SIP server will know the client's IP address when the client sends a request. (SIP server can determine the IP address from the SIP message and not from the IP header) . So now the message from the SIP server will have the client's IP address but STUNNEL does not have a config for that IP address (since it is dynamic and I need to support many clients) and hence STUNNEL will not create a SSL tunnel to the client. Can I have wildcard for the IP address ? something like [sip-client] accept = 11000 connect = *:8000 and have STUNNEL get the destination IP from the message ? I thank you all in advance, Warm Regards Knight

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Stunnel on the same machine
by subrata＠indiatimes.com 05 Oct '07

05 Oct '07

Hi I want to configure to encrypt mysql both client and server on the same machine. Ie the /usr/local/mysql/bin/mysql -u root -p on the same machine where my mysql daemon is located. How to achieve this. regards Subrata -- My life has changed. What about yours? Log on to the new Indiatimes Mail and Live out of the Inbox!

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Re: [stunnel-users] stunnel-users Digest, Vol 38, Issue 14
by sreejith 04 Oct '07

04 Oct '07

Hi, What you have understood is correct. We are the provider of the Web Service; and my requirement is something as explained below, The end users are using a Web site and the data entered in the web site will be converted to an XML file and send to the Web Service which we have provided. The end users are using STUNNEL to encrypt the XML files before sending to us. Hence, I need to decrypt the message and process it. Hence, I think I need to use STUNNEL for doing the same. Also, upon request from the end users I need to send some data, again it is XML files; and I need to encrypt this using STUNNEL and send it to the end user. I am new to STUNNEL and went through the examples provided in www.stunnel.org and didn't get a very good idea on how to get this done. I hope, I am able to make it clear this time. Best regards, Sreejith On 9/28/07, stunnel-users-request(a)mirt.net <stunnel-users-request(a)mirt.net> wrote: > > Send stunnel-users mailing list submissions to > stunnel-users(a)mirt.net > > To subscribe or unsubscribe via the World Wide Web, visit > http://stunnel.mirt.net/mailman/listinfo/stunnel-users > or, via email, send a message with subject or body 'help' to > stunnel-users-request(a)mirt.net > > You can reach the person managing the list at > stunnel-users-owner(a)mirt.net > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of stunnel-users digest..." > > > Today's Topics: > > 1. Re: Stunnel Dies at 3500 connections... (bear(a)bears.org) > 2. Re: Using Stunnel (Luis Rodrigo Gallardo Cruz) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 27 Sep 2007 11:18:36 -0400 (EDT) > From: bear(a)bears.org > Subject: Re: [stunnel-users] Stunnel Dies at 3500 connections... > To: stunnel-users(a)mirt.net > Message-ID: <Pine.LNX.4.64.0709271117350.31308(a)ferocity.bears.org> > Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed > > On Wed, 26 Sep 2007, Michal Trojnara wrote: > > > Try to disable libwrap first: > > ./configure --disable-libwrap > > make clean > > make > > make install > > It is a bottleneck for this kind of tests. > > PERFECT! Thank you very much! That seems to have sorted out my troubles. > The load average stayed well within what I expected. I've got a hardware > firewall protecting the machine, so libwrap wasn't helping me anyhow. > > Peace, > Gary > > ********* ***** ** Gary Coulbourne > *************************.* Bear Activist > ****** *********** ** *******o > ******* ********* **** ****`- Systems Administrator > ******* ********* ***** http://www.bears.org > ****** ********** **** bear(a)bears.org > ## ***** ***** ## **** KB3INA > ### ***** ### **** Animal Conservation/Preservation > #,,, ***,,, ##,,, **,,, > > > ------------------------------ > > Message: 2 > Date: Thu, 27 Sep 2007 12:23:58 -0500 > From: Luis Rodrigo Gallardo Cruz <rodrigo(a)nul-unu.com> > Subject: Re: [stunnel-users] Using Stunnel > To: stunnel-users(a)mirt.net > Message-ID: <20070927172358.GB4459(a)caribdis.nul-unu.com> > Content-Type: text/plain; charset="us-ascii" > > On Thu, Sep 27, 2007 at 02:46:53PM +0530, sreejith wrote: > > Dear friends, > > > > I have a requirement where in I have a web service that uses STUNNEL for > > encrypting and decrypting XML messages. Please help me out with how to > > proceed ? What needs to be done ? How the configuration file should be ? > > Your question is a little confusing. I assume you are trying to encrypt > the > http traffic that the web service travels over. Otherwise, if you want > to have unencrypted http carrying encripted xml, stunnel is not for you. > > In any case, are you the provider or the consumer for the web service? > > -- > Rodrigo Gallardo > GPG-Fingerprint: 7C81 E60C 442E 8FBC D975 2F49 0199 8318 ADC9 BC28 >

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Re: [stunnel-users] Stunnel Testing
by Robert Lambrecht 04 Oct '07

04 Oct '07

I changed BLAT to a port on the local host and set up Stunnel as suggested on a port other than 25. Everything works well. I will have to play with WireShark to see if SSL works. Thanks for the information. Bob

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Re: [stunnel-users] Stunnel Testing
by Luis Rodrigo Gallardo Cruz 30 Sep '07

30 Sep '07

On Sat, Sep 29, 2007 at 05:23:29PM -0500, Robert Lambrecht wrote: > I am using a command line mailer (BLAT) from a batch file to notify me when > errors occur. My ISP requires SSL however still allows non-SSL traffic on > Port 25 as well. > > I then use Stunnel with the following config: > > [smtps] > accept = 25 > connect = smtp.isp.domain.net:465 > > Port 465 is the SSL port for my ISP. > > I run Stunnel as a service in Vista. > > I then have BLAT send an SMTP message on Port 25 to my ISP. This works. stunnel is listening on port 25 *of your machine*, not your isp's. Thus, you need to have BLAT send it to localhost, port 25. Better yet, to avoid confussion, have stunnel listen on some other port (456 would be a good choice), and have BLAT send to localhost, on that port. To check you're not sending anything on the clear, install a network sniffer (wireshark is good) and have it show your network trafic to your.isp.com. If you can read the mail in the displayed traffic, you're sending in cleartext ;-)

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Stunnel Testing
by Robert Lambrecht 29 Sep '07

29 Sep '07

I am using a command line mailer (BLAT) from a batch file to notify me when errors occur. My ISP requires SSL however still allows non-SSL traffic on Port 25 as well. Here is my scenario: I use BLAT to send an SMTP message on Port 25 to my ISP. This works but I must send my userid and password which I don't want to do. I then use Stunnel with the following config: [smtps] accept = 25 connect = smtp.isp.domain.net:465 Port 465 is the SSL port for my ISP. I run Stunnel as a service in Vista. I then have BLAT send an SMTP message on Port 25 to my ISP. This works. My question is, everything seems to work but how can I test this? I'm trying to figure out if it really worked (I sent the message with SSL to port 465) or I am still just sending a message on Port 25. Since both of these cases work, it is hard for me to tell. I've tried to telnet to these ports; however, since I basically have to specify port 25 in either case for the test, I'm not sure that I am successful. Any thoughts on how to make sure my messages are going through SSL? Bob

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stunnel-users Digest, Vol 38, Issue 14
by Menon, Sreejith Mohan 28 Sep '07

28 Sep '07

Hi, What you have understood is correct. We are the provider of the Web Service; and my requirement is something as explained below, The end users are using a Web site and the data entered in the web site will be converted to an XML file and send to the Web Service which we have provided. The end users are using STUNNEL to encrypt the XML files before sending to us. Hence, I need to decrypt the message and process it. Hence, I think I need to use STUNNEL for doing the same. Also, upon request from the end users I need to send some data, again it is XML files; and I need to encrypt this using STUNNEL and send it to the end user. I am new to STUNNEL and went through the examples provided in www.stunnel.org and didn't get a very good idea on how to get this done. I hope, I am able to make it clear this time. I was communicating through another email id till now (sreejithmohanm(a)gmail.com) For our future communication, I will be using the present email id. Sorry for the inconvenience. Thanks and best regards, Sreejith Mohan Menon Software Engineer Globalization Services SAP Labs India Pvt. Ltd. 4th Floor 1B, RMZ NXT, Sonnenhalli, K.R. Puram Hobli, East Taluk, Bangalore - 560 066. P - +91 80 4013 4987 M - +91 98863 08088 mailto:[email protected]

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Using Stunnel
by sreejith 27 Sep '07

27 Sep '07

Dear friends, I have a requirement where in I have a web service that uses STUNNEL for encrypting and decrypting XML messages. Please help me out with how to proceed ? What needs to be done ? How the configuration file should be ? Thanks and best regards, Sreejith

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Stunnel Dies at 3500 connections...
by bear＠bears.org 27 Sep '07

27 Sep '07

Hey! I'm having a problem with a stunnel setup I have, and was wondering if anyone could help? I have two machines, one is acting as a simulator of clients. It uses the MINA library from apache to simulate a bunch of clients of the server. And the other acting as a server. Without stunnel in place, the client and server chat with no trouble... even with as many as 10k simulated clients. The protocol they communicate is just compressed binary data over standard TCP/IP. 20-50 bytes each direction per exchange. The behavior changes once stunnel is in place. The server behaves just fine, but the client acts very strange... in ways that make me think that stunnel is hitting some OS limit. (The files ulimit is set waaaaaay higher than the number of clients) On starting the client application, it begins making connections through the stunnel tunnel. The first 1500 or so are fine, but after that the load on the machine begins to climb. It gets to 5 or so around 2000. If I only do 2000 clients, the load then drops down into the 0.5 range, and the system runs okay. However, if I set the number of simulated clients higher... say 4000, the load continues to climb. When it gets to 3500 or so, the load goes above 500. The machine becomes unusable, and after a bit, stunnel dies with the message KILLED. I tried changing how quickly the clients connect, but that seemed to make no difference. Also, running two stunnels for the clients, and sending 2000 to each, for instance, causes it to still break down around 3500 or so. (Which is why I think it is an os limit) Any suggestions on this? Thanks! Peace, Gary version Stunnel 4.20 startup info 2007.09.24 12:09:50 LOG7[26537:3086939840]: RAND_status claims sufficient entropy for the PRNG 2007.09.24 12:09:50 LOG7[26537:3086939840]: PRNG seeded successfully 2007.09.24 12:09:50 LOG4[26537:3086939840]: Wrong permissions on hcs-key-and-cert-1024.pem 2007.09.24 12:09:50 LOG7[26537:3086939840]: Certificate: hcs-key-and-cert-1024.pem 2007.09.24 12:09:50 LOG7[26537:3086939840]: Certificate loaded 2007.09.24 12:09:50 LOG7[26537:3086939840]: Key file: hcs-key-and-cert-1024.pem 2007.09.24 12:09:50 LOG7[26537:3086939840]: Private key loaded 2007.09.24 12:09:50 LOG7[26537:3086939840]: SSL context initialized for service hcsuno 2007.09.24 12:09:50 LOG5[26537:3086939840]: stunnel 4.20 on i686-pc-linux-gnu with OpenSSL 0.9.8d 28 Sep 2006 2007.09.24 12:09:50 LOG5[26537:3086939840]: Threading:PTHREAD SSL:ENGINE Sockets:POLL,IPv4 Auth:LIBWRAP 2007.09.24 12:09:50 LOG6[26537:3086939840]: file ulimit = 80000 (can be changed with 'ulimit -n') 2007.09.24 12:09:50 LOG6[26537:3086939840]: poll() used - no FD_SETSIZE limit for file descriptors 2007.09.24 12:09:50 LOG5[26537:3086939840]: 39062 clients allowed 2007.09.24 12:09:50 LOG7[26537:3086939840]: FD 3 in non-blocking mode 2007.09.24 12:09:50 LOG7[26537:3086939840]: FD 4 in non-blocking mode 2007.09.24 12:09:50 LOG7[26537:3086939840]: FD 5 in non-blocking mode 2007.09.24 12:09:50 LOG7[26537:3086939840]: SO_REUSEADDR option set on accept socket 2007.09.24 12:09:50 LOG7[26537:3086939840]: hcsuno bound to 0.0.0.0:4090 2007.09.24 12:09:50 LOG7[26537:3086939840]: Created pid file /tmp/stunnel1.pid uname -a Linux testbed-client1 2.6.9-42.ELsmp #1 SMP Sat Aug 12 09:39:11 CDT 2006 i686 i686 i386 GNU/Linux libc 2.3.4 stunnel -version stunnel 4.20 on i686-pc-linux-gnu with OpenSSL 0.9.8d 28 Sep 2006 Threading:PTHREAD SSL:ENGINE Sockets:POLL,IPv4 Auth:LIBWRAP Global options debug = 5 pid = /usr/local/var/run/stunnel/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes Service-level options cert = /usr/local/etc/stunnel/stunnel.pem ciphers = ALL:!ADH:+RC4:@STRENGTH key = /usr/local/etc/stunnel/stunnel.pem session = 300 seconds sslVersion = SSLv3 for client, all for server TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds verify = none gcc -v Reading specs from /usr/lib/gcc/i386-redhat-linux/3.4.6/specs Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-java-awt=gtk --host=i386-redhat-linux Thread model: posix gcc version 3.4.6 20060404 (Red Hat 3.4.6-3) openssl version OpenSSL 0.9.7a Feb 19 2003 In the config, I have: client=yes debug=debug socket = l:TCP_NODELAY=1 pid = /tmp/stunnel1.pid foreground=yes [hcsuno] accept=4090 connect = testbed-hcs1:4094 cert = hcs-key-and-cert-1024.pem key = hcs-key-and-cert-1024.pem ********* ***** ** Gary Coulbourne *************************.* Bear Activist ****** *********** ** *******o ******* ********* **** ****`- Systems Administrator ******* ********* ***** http://www.bears.org ****** ********** **** bear(a)bears.org ## ***** ***** ## **** KB3INA ### ***** ### **** Animal Conservation/Preservation #,,, ***,,, ##,,, **,,,

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