- stunnel-users - stunnel.org

SSL Libraries on Debian
by Hal Vaughan 14 Mar '06

14 Mar '06

I tried compiling Stunnel on Debian and get an error -- I need the ssl libraries. I tried ./configure --with-ssl=/usr/lib/ssl, which is where libssl-dev was installed, and it doesn't help. There is a libssl file in /usr/lib, but --with-ssl=/usr/lib/ssl doesn't seem to work either. What package on Debian provides the needed headers (according to aptitude, libssl-dev, the one I installed, does, but experience is telling me otherwise). (This, btw, is why I am trying to make static binaries -- you can never tell what to expect on Linux systems at this point. Often config/make doesn't work and there are many times when packages don't work out for one reason or another.) Thanks for any help on this. Hal

3 4

stunnel 4.14 died silently under traffic stress test
by Zhuang Yuyao 14 Mar '06

14 Mar '06

Hi, While doing apache benchmark test, stunnel 4.14 died silently. Network topo: client(192.168.20.81 debian running ab2) ---(https)---> gateway(192.168.20.1 running stunnel in server mode) ---(http)---> web server(192.168.10.254) Gateway hardware: 80386 compatible cpu (VIA C3 400Mhz); RAM: 64M stunnel.conf: ############################### ..... compression = zlib client = no ciphers = DES-CBC3-SHA:DES-CBC3-MD5 verify = 1 [test] accept = 443 connect = 192.168.10.254:80 TIMEOUTclose = 0 ############################### Web Server hardware: Dell 2850 with 2G RAM. test_100k.html is a html file whose size is 100k bytes. test_4k.html is a html file whose size is 4k bytes. In client, I am using ab2 as the stress test tool: #ab2 -n 200 -c 100 https://192.168.20.1:443/test_4k.html (means 200 request and 100 concurrency) successfully finished. #ab2 -n 200 -c 100 https://192.168.20.1:443/test_100k.html (means 200 request and 100 concurrency) stunnel died after a few seconds, running log shows: 2006.03.09 15:20:39 LOG5[6962:1024]: stunnel 4.14 on i386-pc-linux-gnu PTHREAD+POLL+IPv4 with OpenSSL 0.9.7i 14 Oct 2005 2006.03.09 15:20:39 LOG5[6962:1024]: 500 clients allowed 2006.03.09 15:20:53 LOG5[6964:1026]: test connected from 192.168.20.81:50186 2006.03.09 15:20:53 LOG5[6965:2051]: test connected from 192.168.20.81:50187 2006.03.09 15:20:53 LOG5[6966:3076]: test connected from 192.168.20.81:50188 2006.03.09 15:20:53 LOG5[6967:4101]: test connected from 192.168.20.81:50189 2006.03.09 15:20:53 LOG5[6968:5126]: test connected from 192.168.20.81:50190 2006.03.09 15:20:54 LOG5[6969:6151]: test connected from 192.168.20.81:50191 2006.03.09 15:20:54 LOG5[6970:7176]: test connected from 192.168.20.81:50192 2006.03.09 15:20:54 LOG5[6971:8201]: test connected from 192.168.20.81:50193 2006.03.09 15:20:54 LOG5[6972:9226]: test connected from 192.168.20.81:50194 2006.03.09 15:20:54 LOG5[6973:10251]: test connected from 192.168.20.81:50195 2006.03.09 15:20:54 LOG5[6974:11276]: test connected from 192.168.20.81:50196 2006.03.09 15:20:54 LOG5[6975:12301]: test connected from 192.168.20.81:50197 2006.03.09 15:20:54 LOG5[6976:13326]: test connected from 192.168.20.81:50198 2006.03.09 15:20:54 LOG5[6977:14351]: test connected from 192.168.20.81:50199 2006.03.09 15:20:54 LOG5[6978:15376]: test connected from 192.168.20.81:50200 2006.03.09 15:20:54 LOG5[6979:16401]: test connected from 192.168.20.81:50201 2006.03.09 15:20:54 LOG5[6980:17426]: test connected from 192.168.20.81:50202 2006.03.09 15:20:54 LOG5[6981:18451]: test connected from 192.168.20.81:50203 2006.03.09 15:20:54 LOG5[6982:19476]: test connected from 192.168.20.81:50204 2006.03.09 15:20:54 LOG5[6983:20501]: test connected from 192.168.20.81:50205 2006.03.09 15:20:54 LOG5[6984:21526]: test connected from 192.168.20.81:50206 2006.03.09 15:20:54 LOG5[6985:22551]: test connected from 192.168.20.81:50207 2006.03.09 15:20:54 LOG5[6986:23576]: test connected from 192.168.20.81:50208 2006.03.09 15:20:54 LOG5[6987:24601]: test connected from 192.168.20.81:50209 2006.03.09 15:20:54 LOG5[6988:25626]: test connected from 192.168.20.81:50210 2006.03.09 15:20:54 LOG5[6989:26651]: test connected from 192.168.20.81:50211 2006.03.09 15:20:54 LOG5[6990:27676]: test connected from 192.168.20.81:50212 2006.03.09 15:20:54 LOG5[6991:28701]: test connected from 192.168.20.81:50213 2006.03.09 15:20:54 LOG5[6992:29726]: test connected from 192.168.20.81:50214 2006.03.09 15:20:54 LOG5[6993:30751]: test connected from 192.168.20.81:50215 2006.03.09 15:20:54 LOG5[6994:31776]: test connected from 192.168.20.81:50216 2006.03.09 15:20:54 LOG5[6995:32801]: test connected from 192.168.20.81:50217 2006.03.09 15:20:54 LOG5[6996:33826]: test connected from 192.168.20.81:50218 2006.03.09 15:20:54 LOG5[6997:34851]: test connected from 192.168.20.81:50219 2006.03.09 15:20:54 LOG5[6998:35876]: test connected from 192.168.20.81:50220 2006.03.09 15:20:54 LOG5[6999:36901]: test connected from 192.168.20.81:50221 2006.03.09 15:20:54 LOG5[7000:37926]: test connected from 192.168.20.81:50222 2006.03.09 15:20:54 LOG5[7001:38951]: test connected from 192.168.20.81:50223 2006.03.09 15:20:54 LOG5[7002:39976]: test connected from 192.168.20.81:50224 2006.03.09 15:20:54 LOG5[7003:41001]: test connected from 192.168.20.81:50225 2006.03.09 15:20:54 LOG5[7004:42026]: test connected from 192.168.20.81:50226 2006.03.09 15:20:55 LOG5[7005:43051]: test connected from 192.168.20.81:50227 2006.03.09 15:20:55 LOG5[7006:44076]: test connected from 192.168.20.81:50228 2006.03.09 15:20:55 LOG5[7007:45101]: test connected from 192.168.20.81:50229 2006.03.09 15:20:55 LOG5[7008:46126]: test connected from 192.168.20.81:50230 2006.03.09 15:20:55 LOG5[7009:47151]: test connected from 192.168.20.81:50231 2006.03.09 15:20:55 LOG5[7010:48176]: test connected from 192.168.20.81:50232 2006.03.09 15:20:55 LOG5[7011:49201]: test connected from 192.168.20.81:50233 2006.03.09 15:20:55 LOG5[7012:50226]: test connected from 192.168.20.81:50234 2006.03.09 15:20:55 LOG5[7013:51251]: test connected from 192.168.20.81:50235 2006.03.09 15:20:55 LOG5[7014:52276]: test connected from 192.168.20.81:50236 2006.03.09 15:20:55 LOG5[7015:53301]: test connected from 192.168.20.81:50237 2006.03.09 15:20:55 LOG5[7016:54326]: test connected from 192.168.20.81:50238 2006.03.09 15:20:55 LOG5[7017:55351]: test connected from 192.168.20.81:50239 2006.03.09 15:20:55 LOG5[7018:56376]: test connected from 192.168.20.81:50240 2006.03.09 15:20:55 LOG5[7019:57401]: test connected from 192.168.20.81:50241 2006.03.09 15:20:55 LOG5[7020:58426]: test connected from 192.168.20.81:50242 2006.03.09 15:20:55 LOG5[7021:59451]: test connected from 192.168.20.81:50243 2006.03.09 15:20:55 LOG5[7022:60476]: test connected from 192.168.20.81:50244 2006.03.09 15:20:55 LOG5[7023:61501]: test connected from 192.168.20.81:50245 2006.03.09 15:20:55 LOG5[7024:62526]: test connected from 192.168.20.81:50246 Killed It looks like that is resource on gateway is exhausted under such a traffic, but my question is: why stunnel just died instead of rejecting further connections. Thanks very much. Zhuang Yuyao

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Static Binaries for Linux? (Didn't get answer previously)
by Hal Vaughan 13 Mar '06

13 Mar '06

I've brought this up before and didn't get ANY answer at all, and I'm sure someone involved with Stunnel would at least know if what I'm asking is possible. I know help is given on a volunteer basis, so if someone could help me figure this out, it would be a huge help. So far I've spent over a week on getting Stunnel or another program to do the job and if I can't get this to work, I need to just drop Stunnel and figure out how to do the same thing in Java. So thanks for any help. I may need to include Stunnel with my application so my clients behind restrictive firewalls can still enable me to work on their systems with RealVNC. I'm working with clients on both Windows and Linux. Is there a way to get static binaries for Linux? I don't know C or C++ or much more than running ./configure && make && make install. I'd like to know if it is possible or what is needed to create static binaries of the files so I could easily install stunnel on any Linux system by just copying over the proper files. Also, what archive format does the Windows installer use? I'd like to do something similar for Windows, so if I could pull the files out of the installer and copy them over myself, it would be a huge help. Thanks! Hal

3 4

Compile failure with 4.15
by MeeAGhost 13 Mar '06

13 Mar '06

I ran ./configure --enable-dh --disable-libwrap then when I try to execute make the build fails: [...] if gcc -DPACKAGE_NAME=\"stunnel\" -DPACKAGE_TARNAME=\"stunnel\" -DPACKAGE_VERSION=\"4.15\" -DPACKAGE_STRING=\"stunnel\ 4.15\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"stunnel\" -DVERSION=\"4.15\" -DHOST=\"sparc-sun-solaris2.9\" -DCPU_SPARC=1 -DVENDOR_SUN=1 -DOS_SOLARIS2_9=1 -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -DSIZEOF_UNSIGNED_CHAR=1 -DSIZEOF_UNSIGNED_SHORT=2 -DSIZEOF_UNSIGNED_INT=4 -DSIZEOF_UNSIGNED_LONG=4 -DHAVE_DEV_PTMX=1 -DHAVE_LIBNSL=1 -DHAVE_LIBSOCKET=1 -DHAVE_LIBDL=1 -DHAVE_LIBZ=1 -DHAVE_UCONTEXT_H=1 -DHAVE_PTHREAD_H=1 -DHAVE_SYS_SELECT_H=1 -DHAVE_POLL_H=1 -DHAVE_SYS_POLL_H=1 -DHAVE_SYS_IOCTL_H=1 -DHAVE_SYS_FILIO_H=1 -DHAVE_STROPTS_H=1 -DHAVE_GRP_H=1 -DHAVE_UNISTD_H=1 -DHAVE_SYS_RESOURCE_H=1 -DHAVE_SNPRINTF=1 -DHAVE_VSNPRINTF=1 -DHAVE_WAITPID=1 -DHAVE_WAIT4=1 -DHAVE_SETSID=1 -DHAVE_SETGROUPS=1 -DHAVE_CHROOT=1 -DHAVE_SYSCONF=1 -DHAVE_GETRLIMIT=1 -DHAVE_PTHREAD_SIGMASK=1 -DHAVE_LOCALTIME_R=1 -DHAVE_GETCONTEXT=1 -DHAVE___MAKECONTEXT_V2=1 -DHAVE_POLL=1 -DHAVE_ENDHOSTENT=1 -DHAVE_GETADDRINFO=1 -DHAVE_GETNAMEINFO=1 -DHAVE_OPENSSL=1 -Dssldir=\"/usr/local\" -DHAVE_OSSL_ENGINE_H=1 -DRANDOM_FILE=\"/dev/urandom\" -DHAVE_LIBPTHREAD=1 -DUSE_PTHREAD=1 -DUSE_DH=1 -I. -I. -I/usr/kerberos/include -DLIBDIR='"/usr/local/lib"' -DCONFDIR='"/usr/local/etc/stunnel"' -DPIDFILE='"/usr/local/var/run/stunnel/stunnel.pid"' -g -O2 -Wall -Wshadow -Wcast-align -Wpointer-arith -I/usr/local/include -MT ctx.o -MD -MP -MF ".deps/ctx.Tpo" -c -o ctx.o ctx.c; \ then mv -f ".deps/ctx.Tpo" ".deps/ctx.Po"; else rm -f ".deps/ctx.Tpo"; exit 1; fi ctx.c: In function `init_dh': ctx.c:170: error: `section' undeclared (first use in this function) ctx.c:170: error: (Each undeclared identifier is reported only once ctx.c:170: error: for each function it appears in.) ctx.c:198: error: `ctx' undeclared (first use in this function) ctx.c: In function `crl_callback': ctx.c:491: warning: cast increases required alignment of target type make[1]: *** [ctx.o] Error 1 make[1]: Leaving directory `/tmp/stunnel-4.15/src' make: *** [all-recursive] Error 1 I checked ctx.c and couldn't see where section and ctx are being defined inside of the init_dh function nor could I see them defined in the header files. Am I missing something? TIA for any assistance. -- Chris

2 1

Rainbow Technologies CryptoSwift CS200 driver
by Michal Trojnara 11 Mar '06

11 Mar '06

Dear Users, I just bought a second-hand Rainbow Technologies CryptoSwift CS200 card to test engine support for stunnel. Unfortunately I can't find any Linux/Windows driver for this card. Do you have one? Please help. Best regards, Mike

2 1

stunnel 4.15 released
by Michal Trojnara 11 Mar '06

11 Mar '06

Version 4.15, 2006.03.11, urgency: LOW: * Release notes - There are a lot of new features in this version. I recommend to test it well before upgrading your mission-critical systems. * Bugfixes - Fix for pthreads on Solaris 10 (thx to Hans Werner Strube <strube(a)physik3.gwdg.de>). - Attempt to autodetect socklen_t type in configure script. - Default threading model changed to pthread for better portability. - DH parameters are not included in the certificate by default. * New features sponsored by Software House http://www.swhouse.com/ - Most SSL-related options (including client, cert, key) are now available on service level, so it is possible to have an SSL client and an SSL server in a single stunnel process. - Windows CE (version 3.0 and higher) support. * New features - Client mode CONNECT protocol support (RFC 2817 section 5.2). http://www.ietf.org/rfc/rfc2817.txt - Retrying exec+connect services added. * File locations are more compliant to Filesystem Hierarchy Standard 2.3 - configuration and certificates are in $prefix/etc/stunnel/ - binaries are in $prefix/sbin/ - default pid file is $prefix/var/run/stunnel.pid - manual is $prefix/man/man8/stunnel.8 - other docs are in $prefix/share/doc/stunnel/ - libstunnel is in $prefix/lib - chroot directory is setup in $prefix/var/lib/stunnel/ this directory is chmoded 1770 and group nogroup sha1sum for stunnel-4.15.tar.gz: 735406c1ca94904581158a434214e1f6568539d0 Home page: http://stunnel.mirt.net/ Download: ftp://stunnel.mirt.net/stunnel/ Best regards, Mike

1 0

"STACK_RESERVE is too high" after every connect
by Rob Munsch 10 Mar '06

10 Mar '06

Hello. I've recently gone on a self-inflicted crash course on openssl and seem to have gotten a centralized logging system going, logging to MySQL. I'm seeing everything i'd expect to see, but with an extra bit: what is STACK_RESERVE, and why is it too high? Some context, mildly sanitized: |Mar 9 18:33:34 isis stunnel: LOG5[24810:6]: syslog-ng connected from x.x.x.x:44032| |Mar 9 18:33:34 isis stunnel: LOG5[24810:6]: VERIFY OK: depth=1, /C=US/ST=Pennsylvania/L=Philadelphia/O=Solutions for Progress/CN=blah.com/emailAddress=blah@blah| |Mar 9 18:33:34 isis stunnel: LOG5[24810:6]: VERIFY OK: depth=0, /C=US/ST=Pennsylvania/O=Solutions for Progress/OU=IT/CN=IT/emailAddress=blah@blah| |Mar 9 20:39:02 isis stunnel: LOG5[24810:6]: Connection closed: 0 bytes sent to SSL, 2891 bytes sent to socket| |Mar 9 20:39:02 isis stunnel: LOG3[24810:6]: STACK_RESERVE is too high| this is daemon.log on the server machine (isis). Messages from the remote host are going to MySQL successfully. But at the end of every apparently-successful transaction, there's this stack complaint. Can't find anything in the archives or via Google for "stunnel stack_reserve," which i found really odd, which is why i'm here... Version output: stunnel 4.14 on i686-pc-linux-gnu UCONTEXT+POLL+IPv4 with OpenSSL 0.9.7g 11 Apr 2005 Thanks! -- Rob Munsch Solutions For Progress IT

2 1

RE: How to get tcpwrappers configured/compiled into stunnel 4.04 on Tru64 UNIX 5.1B
by John Lanier 08 Mar '06

08 Mar '06

Hello, I am a newbie to stunnel and tcpwrappers, so please bear with me: I am trying to compile tcpwrapper support into stunnel v4.04 on Tru64 UNIX v5.1B (apparently v4.14 does not compile on 5.1A or higher, per http://stunnel.mirt.net/pipermail/stunnel-users/2006-January/000935.html) I am having what appears to be problems getting tcpwrapper support to compile with 4.04. I have consulted the following resources, but I am still having problems: ------------------------------------------------------------------------------------------------------- 1. http://www.stunnel.org/faq/troubleshooting.html#ToC9 "configure isn't finding my TCP Wrapper installation" Solution: You probably have it in a non-standard place, ie somewhere that gcc can't find it on it's own. Let's say you had your tcp wrappers installed in /opt/tcpd_7.6. To help gcc find your include files and libraries, you'd want to set three environment variables as follows: CFLAGS="$CFLAGS -I/opt/tcpd_7.6/include" CPPFLAGS="$CPPFLAGS -I/opt/tcpd_7.6/include" LDFLAGS="$LDFLAGS -L/opt/tcpd_7.6/lib" export CFLAGS CPPFLAGS LDFLAGS And then re-run configure. This is the generic way to have configure find specific libraries, and is not specific to Stunnel itself. 2. http://www.stunnel.org/faq/run.html#ToC5 "Running stunnel with TCP wrappers" You do not need to use the tcpd binary to wrap stunnel (although you could). You can can compile in support for TCP wrappers when you compile stunnel itself. The configure program should be able to determine if the libwrap library (-lwrap) and headers are available in standard locations. ............. I have openssl 0.9.7h installed on ccpe01 v51b pk#5, with tcp-wrappers7.6. I did the configure, make and make install and things. All stages appeared successful, but then I attempted the ./configure --with-tcp-wrappers and it errored with -lwrap not found. checking for SSL directory... /usr/local/ssl checking for "/dev/urandom"... yes checking whether to disable RSA support... no checking whether to enable DH support... no checking for gethostbyname in -lnsl... no checking for socket in -lsocket... no checking for pthread_create in -lpthread... no checking for pthread_create in -lc_r... no checking for openpty in -lutil... yes checking whether to use the libwrap (TCP wrappers) library... yes checking for hosts_access in -lwrap... not found <-- .............. So then I tried assigning the 3 environment variables and things got worse. The include and lib directories are referenced for tcpd 7.6, but after installing tcp wrappers I do not find include or lib directories for tcpd. Q: Should I expect NOT to see the include or lib directories as defined in #1 above, and, if so, will specifying the absolute path to the tcpwrapper images (EX: /var/tcp_wrappers/tcp_wrappers_7.6) suffice? 3. I followed these instructions when compiling/configuring tcpd v7.6 (downloaded from ftp://ftp.porcupine.org/pub/security/index.html) ............ 7.1 - Easy configuration and installation ----------------------------------------- The "easy" recipe requires no changes to existing software or configuration files. Basically, you move the daemons that you want to protect to a different directory and plug the resulting holes with copies of the wrapper programs. If you don't run Ultrix, you won't need the miscd wrapper program. The miscd daemon implements among others the SYSTAT service, which produces the same output as the WHO command. Type `make' and follow the instructions. The Makefile comes with ready-to-use templates for many common UNIX implementations (sun, ultrix, hp-ux, aix, irix,...). .............. Thanks in advance for any guidance and/or advice that you can offer. --John Lanier

1 0

Special Installs -- Static Binaries and Required Files
by Hal Vaughan 08 Mar '06

08 Mar '06

I may need to include Stunnel with my application so my clients behind restrictive firewalls can still enable me to work on their systems with RealVNC. I'm working with clients on both Windows and Linux. Windows: I know the installer has the files included in it in an archive, but what archive format is it, or what kind or archive program on Linux can I use to read it? Is installing Stunnel on Windows just a matter of copying the files, or are there settings I have to change in the registry? Linux: Is there any way to get static binaries (yes, I know they're bigger) so I can just copy over files to install it as a program (not as a service -- I noticed Debian set it up as a service)? Thanks! Hal

1 0

Stunnel Won't Start on Linux (even with fixed /etc/default/stunnel)
by Hal Vaughan 08 Mar '06

08 Mar '06

I'm trying to start stunnel4 on Linux. I've modified the /etc/stunnel/stunnel.conf file so I can use it with RealVNC. When I run "stunnel4 /etc/stunnel/stunnel.conf" or "/etc/init.d/stunnel4 start", neither command gives me errors or any output, even with -d 7 set. After the shell returns control to me, I do "ps -ax" and have yet to see any instance of stunnel running. There is never a file in /var/run/stunnel to indicate a working daemon if I start it as one. I have edited /etc/default/stunnel4 to look like this (changed ENABLED). I've included it and my /etc/stunnel/stunnel.conf below. No matter what I do, there is never any evidence that stunnel is staring or doing anything. Even error messages would be a big help, so I'd at least know what was wrong. Any help appreciated. I'm sure it's something so obvious I don't see how I could miss it. Thanks for any help. Hal -----------------/etc/default/stunnel4------------------------ # /etc/default/stunnel # Julien LEMOINE <speedblue(a)debian.org> # September 2003 # Change to one to enable stunnel ENABLED=1 FILES="/etc/stunnel/*.conf" OPTIONS="" # Change to one to enable ppp restart scripts PPP_RESTART=0 ------------/etc/stunnel/stunnel.conf-------------------- CAfile = /etc/stunnel/CAcert.pem CApath = /etc/stunnel/ cert = server.pem client = no verify = 3 debug = 7 [vnc] accept = 443 connect = 127.0.0.1:5500

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