stunnel-users

2 participants
3307 discussions

3.x branch updates
by Brian Hatch 29 Jul '05

29 Jul '05

As y'all can probably see, I've started climbing out from the rock under which I've been living (the rock called "too many kids".) If there are folks who have issues or bugs in stunnel 3.x, let's get talking off list so we can make another release. I'd like to include only security or bug fixes. The 4.x branch is totally fine, and I see no reason to add new features to the 3.x branch. This would be one of at most a few last bug fix releases for the 3.x branch so I can lay it to rest. -- Brian Hatch "Look, somebody's got to have Systems and some damn perspective around Security Engineer here. Boom, sooner or later. http://www.ifokr.org/bri/ *BOOM*!" Every message PGP signed

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Linux pppd VPN network notwork very well
by Colin McKinnon 27 Jul '05

27 Jul '05

Hi all, I've got two two LANs behind masquerading routers that I've linked via a stunnel + pppd vpn. When it works, it works, but I've got a couple of problems - has anybody out there in Stunnel Land managed to fix / workaround these? 1) The connection goes down fairly regluarly. I've setup a cron job to move a few packets back and forth to make sure that the ADSL connection at both ends stays up (pppd set not do demand stuff). There's nothing in the logs to suggest that the ADSL *is* going down, but I thought it would eliminate a lot of possibilities. (see log entries below). Currently the link is going down at lesat once per day. Uptime varies greatly. I can't see anyway of asking stunnel to try again if the pppd exits (see conf below) other than manually restarting it. I'm hoping to scale the VPN up to multiple sites - with one connection, I can just do /etc/rc.d/stunnel restart - but if I've got multiple instances of stunnel running with different configs it gets a bit messy to reset a single connection. I did think about having multiple hard links to the stunnel binary, so each VPN will have a different process name attached to it, but this strikes me as a bit of a hack. 2) bandwidth on the link is poor. I consistently get 1/4 of the bandwidth (measured using scp to copy largish files) compared with bypassing the stunnel/pppd pair (same route between LANs). While I expected some overhead, this seems rather a lot. 3) latency is a lot higher too 4) The VPN seems to stutter more regularly than the direct connection ...I mean that I don't seem to be getting any traffic for 5-10 seconds then it resumes without any loss of data (e.g. when using ssh). The routers at either end are relatively dumb so (as I understand it) there's not many options for using IPIP or GRE tunnelling). Anybody got any suggestions as to how I can make it (particularly) more reliable and (also) a bit faster? TIA, Colin McKinnon pppd -------- pppd local nodeflate nobsdcomp nodefaultroute 10.1.17.208:10.1.20.202 log entries: ---------------- Stunnel started manually: Jul 19 08:25:59 serv8 stunnel[740]: stunnel 4.05 on i686-suse-linux-gnu PTHREAD with OpenSSL 0.9.7d 17 Mar 2004 Jul 19 08:25:59 serv8 stunnel[740]: FD_SETSIZE=1024, file ulimit=1024 -> 500 clients allowed Jul 19 08:25:59 serv8 pppd[743]: pppd 2.4.2 started by stunnel, uid 100 Jul 19 08:25:59 serv8 pppd[743]: Using interface ppp0 Jul 19 08:25:59 serv8 pppd[743]: Connect: ppp0 <--> /dev/pts/1 Everything works fine (although a little slow) then... Jul 19 10:36:32 serv8 pppd[743]: No response to 4 echo-requests Jul 19 10:36:32 serv8 pppd[743]: Serial link appears to be disconnected. Jul 19 10:36:34 serv8 pppd[743]: Script /etc/ppp/ip-down finished (pid 1668), status = 0x0 Jul 19 10:36:34 serv8 ip-down: SIOCDELRT: No such process Jul 19 10:36:36 serv8 pppd[743]: Connection terminated. Jul 19 10:36:36 serv8 pppd[743]: Connect time 130.6 minutes. Jul 19 10:36:36 serv8 pppd[743]: Sent 58200 bytes, received 57227 bytes. Jul 19 10:36:36 serv8 pppd[743]: Connect time 130.6 minutes. Jul 19 10:36:36 serv8 pppd[743]: Sent 58200 bytes, received 57227 bytes. Jul 19 10:36:36 serv8 pppd[743]: Exit. Jul 19 10:36:36 serv8 stunnel[741]: readsocket: Input/output error (5) Jul 19 10:36:36 serv8 stunnel[741]: Connection reset: 68626 bytes sent to SSL, 66280 bytes sent to socket Stunnel config --------------------- foreground = no client = yes setuid = stunnel setgid = dialout CAfile = /etc/stunnel/3bCArootCert.pem cert = /etc/stunnel/system.pem verify = 2 session = 3600 [ppp] connect = remotehost:2020 exec = /usr/sbin/pppd execargs = pppd local nodeflate nobsdcomp nodefaultroute 10.1.17.208:10.1.20.202 pty = yes (converse at other end) Routing at 'cleint' end --------------------------------- Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.1.20.202 * 255.255.255.255 UH 0 0 0 ppp0 192.168.1.0 * 255.255.255.0 U 0 0 0 eth1 10.1.20.0 * 255.255.255.0 U 0 0 0 ppp0 10.1.17.0 * 255.255.255.0 U 0 0 0 eth2 loopback * 255.0.0.0 U 0 0 0 lo default 192.168.1.1 0.0.0.0 UG 0 0 0 eth1 (eth1 conects to the ADSL router, eth2 to the LAN)

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newbie q: stunnel -d and -r options
by Jagannadha Bhattu 27 Jul '05

27 Jul '05

I was reading a book where they discussed using stunnel as client and server proxy with -d -r and -c options. I have SuSE 9.3 and the stunnel on it has different options. Then I found that we have to use config file. I used it to configure my server. I defined the following section: [myserver] accept = 12345 connect = 12323 Here my server listens on 12323. I have my server already running. Now I typed stunnel and nothing happened. I typed "pgrep stunnel" and could not see anything. Apparently I have not understood how stunnel works. Can some one let me know how can I configure to use stunnel to secure my server app and my client app which are not ssl aware. I also have a question. The book which I am reading says, stunnel acts as a proxy for a server app. If my server app is listening on A then if I want stunnel to service all clients connecting to A then how can it do it as that port is already serviced by my server app. Thanks JB

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error compilation stunnel-4.11 for ARM9
by Stage Iup - Fabrice & Frederic 27 Jul '05

27 Jul '05

Hi all, I would like to compile stunnel-4.11for a board based on a ATMEL at91rm9200. I try to compile this with this commande [root@StageIup stunnel-4.11]# CC=/usr/local/arm/3.0/bin/arm-linux-gcc ./configure --host=arm-linux --prefix=/home/fabrice/dev/stunnel/stunnel-armtest --with-ssl=/home/fabrice/dev/openssl But I have the following error configure: **************************************** PTY device files checking for "/dev/ptmx"... configure: error: cannot check for file existence when cross compiling If any body have an idea about how to resolve this problem or how to compile stunnel for ARM ... Thanks -- Cordialement Fabrice -- IFOTEC Tél : 04 76 67 53 53

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samba over stunnel performance
by Brian Szymanski 26 Jul '05

26 Jul '05

Howdy... I'm trying to run samba over stunnel on a wireless connection. Here's the setup: unix box <- wifi -> windows laptop Unfortunately, reading files from the shared drive is extremely slow. If I look at the stunnel box on my windows machine, it is pumping out about 20 messages/second that say: LOG7[2140:3636]: SSL_read returned WANT_READ: retrying On two >1GHz machines, this is utilizing about 5% of cpu, and 4% of the 11Mbps link. Clearly there is room for improvement here! I tried poking around with stunnel.conf on the server to no avail - specifically, I commented out the lines: ; Some performance tunings socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 ;compression = rle And restarted stunnel - same miserable performance (roughly the same throughput, and resource usage). Is there something about the SMB protocol that would cause stunnel to not deal with it well? If so, is there a configuration option somewhere I can tune, or do I have to RTFS & hack it to get decent performance here? Any tips would be greatly appreciated. Thanks in advance! Cheers, Brian Brian Szymanski Software and Systems Developer Media Matters for America ski(a)mediamatters.org aim: xbrianskix

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zlib + win2000 = crash
by lascjr＠bol.com.br 26 Jul '05

26 Jul '05

Hi, I successfully installed and executed stunnel without compression and with compression RLE, but with compression ZLIB I receive the following message in the startup: 2005.07.25 08:24:28 LOG5[1408:1524]: stunnel 4.11 on x86-pc-mingw32-gnu WIN32+IPv4 with OpenSSL 0.9.7f 22 Mar 2005 2005.07.25 08:24:28 LOG3[1408:1976]: Error reading certificate file: stunnel.pem 2005.07.25 08:24:28 LOG3[1408:1976]: error stack: 25070067 : error:25070067:DSO support routines:DSO_load:could not load the shared library 2005.07.25 08:24:28 LOG3[1408:1976]: error stack: 25078067 : error:25078067:DSO support routines:WIN32_LOAD:could not load the shared library 2005.07.25 08:24:28 LOG3[1408:1976]: error stack: 25070067 : error:25070067:DSO support routines:DSO_load:could not load the shared library 2005.07.25 08:24:28 LOG3[1408:1976]: SSL_CTX_use_certificate_chain_file: 25078067: error:25078067:DSO support routines:WIN32_LOAD:could not load the shared library 2005.07.25 08:24:28 LOG3[1408:1976]: Server is down I made download of archive ZLIB1.DLL in the client and in the server, the startup is normal, but after the beginning of the communications the server crash. I use Win2000 Server SP4 in the server and Win2000 Pro in the client. thanks Luis A S C Junior

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Stunnel 4.05 on arm-linux
by Stage Iup - Fabrice & Frederic 26 Jul '05

26 Jul '05

Hi all I would to use stunnel on a board based on the AT91RM9200. I'm actually trying to use Stunnel 4.05 for armv4l. I can launch it but when i try to connect to https (through a thttpd server), nothings happen. In the arm-linux terminal, i've got the following informations: [root@EmbeddedLinux sbin]$./stunnel stunnel.conf 1970.01.01 03:03:47 LOG5[488:16384]: stunnel 4.04 on armv4l-unknown-linux-gnu PTHREAD+LIBWRAP with OpenSSL 1970.01.01 03:03:47 LOG5[488:16384]: FD_SETSIZE=1024, file ulimit=1024 -> 500 clients allowed ./stunnel: relocation error: ./stunnel: undefined symbol: request_init If any body have an idea about how to resolve this problem... -- With regards Fabrice JAUME -- IFOTEC Tél : 04 76 67 53 53

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Problems compiling on AIX5.2 -- ld: 0711-317 ERROR: Undefined symbol: .inflateEnd
by Claus Lund 25 Jul '05

25 Jul '05

Hi everybody, I am trying to get stunnel 4.11 compiled on my AIX boxes but I am not having much luck. I am using GCC 3.3.2 on AIX 5.2. OpenSSL has been compiled and is working on those same boxes (OpenSSL 0.9.8). I configured stunnel using: root@tax178:/tmp/stunnel/stunnel-4.11 # ./configure --sysconfdir=/etc/stunnel --prefix=/usr/local --disable-libwrap And everything seems to go OK during the config steps. When I try to build stunnel it comes up with a series of warnings and eventually dies with a bunch of errors. First the warnings: "nt.Po"; else rm -f ".deps/client.Tpo"; exit 1; fi client.c: In function `init_local': client.c:178: warning: passing arg 3 of `ngetpeername' from incompatible pointer type client.c: In function `make_sockets': client.c:894: warning: passing arg 3 of `ngetsockname' from incompatible pointer type client.c:902: warning: passing arg 3 of `naccept' from incompatible pointer type client.c: In function `connect_wait': client.c:996: warning: passing arg 5 of `getsockopt' from incompatible pointer type if gcc -DPACKAGE_NAME=\"stunnel\" -D" "/options.Po"; else rm -f ".deps/options.Tpo"; exit 1; fi options.c: In function `print_socket_options': options.c:1401: warning: passing arg 5 of `getsockopt' from incompatible pointer type if gcc -DPACKAGE_NAME=\"stunnel\" -DPACKAGE_TARNAME=\"stunnel\"" "ps/sthreads.Tpo" ".deps/sthreads.Po"; else rm -f ".deps/sthreads.Tpo"; exit 1; fi sthreads.c: In function `stack_info': sthreads.c:343: warning: int format, long unsigned int arg (arg 4) sthreads.c:343: warning: int format, long unsigned int arg (arg 5) sthreads.c:343: warning: int format, long unsigned int arg (arg 6) sthreads.c:343: warning: int format, long unsigned int arg (arg 7) if gcc -DPACKAGE_NAME=\"stunnel\" -DPACKAGE_TARNAME=\"stunnel\"" "tunnel.Tpo" ".deps/stunnel.Po"; else rm -f ".deps/stunnel.Tpo"; exit 1; fi stunnel.c: In function `accept_connection': stunnel.c:206: warning: passing arg 3 of `naccept' from incompatible pointer type if gcc -DPACKAGE_NAME=\"stunnel\" -DPACKAGE_TARNAME=\"stunnel\"" And then the final errors: "/bin/sh ../libtool --tag=CC --mode=link gcc -g -O2 -Wall -Wshadow -Wcast-align -Wpointer-arith -I/usr/local/include -o stunnel client.o log.o options.o protocol.o network.o resolver.o ssl.o sthreads.o stunnel.o pty.o -lnsl -ldl -L/usr/local/lib -lssl -lcrypto gcc -g -O2 -Wall -Wshadow -Wcast-align -Wpointer-arith -I/usr/local/include -o stunnel client.o log.o options.o protocol.o network.o resolver.o ssl.o sthreads.o stunnel.o pty.o -lnsl -ldl -L/usr/local/lib -lssl -lcrypto ld: 0711-317 ERROR: Undefined symbol: .inflateEnd ld: 0711-317 ERROR: Undefined symbol: .deflateEnd ld: 0711-317 ERROR: Undefined symbol: .inflateInit_ ld: 0711-317 ERROR: Undefined symbol: .deflateInit_ ld: 0711-317 ERROR: Undefined symbol: .deflate ld: 0711-317 ERROR: Undefined symbol: .inflate ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information. collect2: ld returned 8 exit status make: 1254-004 The error code from the last command is 1." Hopefully there will be some C/AIX gurus out there who can help me get past this problem... Thank you in advance, Claus

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Poll Problem
by John O'Fallon 24 Jul '05

24 Jul '05

I have confirmed that the problem I reported last week (on Mac OS X, streams are truncated with a reported "s_poll_wait returned 1, but no descriptor is ready" error) can be corrected by using the older "select" versions of the network functions. I did this by tweaking the source, but would like to make the fix as cleanly as possible, so... Sorry if this is in the docs (I couldn't find it), but what is the best way to disable the poll option? John

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Re-6: [stunnel-users] Problem with mysql
by lmarcilly＠aressi.fr 22 Jul '05

22 Jul '05

Nobody has an idea?? I don't know how to resolve my problem, and i don't know where i should serach in order to resolve it... Could you help me please?? Is "-disable-libwrap" the problem? or should it work without libwrap? Thanks a lot! -------- Original Message -------- Subject: Re-5: [stunnel-users] Problem with mysql (21-juil.-2005 10:00) From: lmarcilly(a)aressi.fr To: lmarcilly(a)aressi.fr > Sorry, i doesn't look in the good stunnel.log, there is a SIGTERM because i > stop the box! > > So here is my stunnel.log : > > 2005.07.21 11:48:25 LOG5[230:1]: stunnel 4.11 on i686-pc-linux-gnu UCONTEXT+ > POLL+IPv4 with OpenSSL 0.9.7g 11 Apr 2005 > 2005.07.21 11:48:26 LOG7[230:1]: RAND_status claims sufficient entropy for > the PRNG > 2005.07.21 11:48:26 LOG6[230:1]: PRNG seeded successfully > 2005.07.21 11:48:26 LOG6[230:1]: file ulimit = 1024 (can be changed with ' > ulimit -n') > 2005.07.21 11:48:26 LOG6[230:1]: poll() used - no FD_SETSIZE limit for file > descriptors > 2005.07.21 11:48:26 LOG5[230:1]: 500 clients allowed > 2005.07.21 11:48:26 LOG7[230:1]: FD 4 in non-blocking mode > 2005.07.21 11:48:26 LOG7[230:1]: FD 5 in non-blocking mode > 2005.07.21 11:48:26 LOG7[230:1]: FD 6 in non-blocking mode > 2005.07.21 11:48:26 LOG7[230:1]: SO_REUSEADDR option set on accept socket > 2005.07.21 11:48:26 LOG7[230:1]: mysql bound to 127.0.0.1:3306 > 2005.07.21 11:48:26 LOG7[231:1]: Created pid file /stunnel.pid > > So it seems to run properly but telnet 192.168.1.121 3306 ot telnet > localhost 3306 doesn't work, i get a time out! > > I will give you more informations : > > stunnel-4.11 on an lfs system (Kernel 2.4.30 with the bridge patch and the > SSP patch) > > gcc -v : > > Reading specs from /home/lmarcilly/lfs_install/build/usr/bin/../lib/gcc-lib/ > i686-pc-linux-gnu/3.3.3/specs > Configured with: ../gcc-3.3.3/configure --prefix=/usr --enable-shared -- > enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu --enable- > languages=c,c++ --disable-nls > Thread model: posix > gcc version 3.3.3 > > When compiling : > > ./configure --prefix=/usr --disable-libwrap > make > make install > > stunnel.conf : > > chroot = /usr/var/stunnel/ > pid = /stunnel.pid > socket = l:TCP_NODELAY=1 > socket = r:TCP_NODELAY=1 > debug = 7 > output = /var/log/stunnel.log > client = yes > [mysql] > accept = localhost:3306 > connect = 192.168.1.104:3307 > > I've also tried with accept = 3306 and accept = 127.0.0.1:3306 but with no > success... > > I'm sorry but i have no idea and i don't know how resolve my problem so > please help me... > > Thanks in advance! > > lm. > > -------- Original Message -------- > Subject: Re-4: [stunnel-users] Problem with mysql (21-juil.-2005 9:26) > From: lmarcilly(a)aressi.fr > To: lmarcilly(a)aressi.fr > > > I try : > > > > mysql -h 192.168.1.121 --protocol=TCP -u user --password=xxx > > > > and i get this message : > > > > Can't connect to MySQL server on '192.168.1.121' > > > > I also try : > > > > telnet 192.168.1.121 3306 > > > > and i get : > > > > telnet : Unable to connect to remote host : Connection timed out > > > > Here is my stunnel.log : > > > > 2005.07.21 11:13:07 LOG5[2462:1]: stunnel 4.11 on i686-pc-linux-gnu > > UCONTEXT+POLL+IPv4 with OpenSSL 0.9.7g 11 Apr 2005 > > 2005.07.21 11:13:07 LOG7[2462:1]: Snagged 64 random bytes from /root/.rnd > > 2005.07.21 11:13:07 LOG7[2462:1]: Wrote 1024 new random bytes to /root/.rnd > > 2005.07.21 11:13:07 LOG7[2462:1]: RAND_status claims sufficient entropy for > > > > the PRNG > > 2005.07.21 11:13:07 LOG6[2462:1]: PRNG seeded successfully > > 2005.07.21 11:13:07 LOG6[2462:1]: file ulimit = 1024 (can be changed with ' > > ulimit -n') > > 2005.07.21 11:13:07 LOG6[2462:1]: poll() used - no FD_SETSIZE limit for > > file descriptors > > 2005.07.21 11:13:07 LOG5[2462:1]: 500 clients allowed > > 2005.07.21 11:13:07 LOG7[2462:1]: FD 4 in non-blocking mode > > 2005.07.21 11:13:07 LOG7[2462:1]: FD 5 in non-blocking mode > > 2005.07.21 11:13:07 LOG7[2462:1]: FD 6 in non-blocking mode > > 2005.07.21 11:13:07 LOG7[2462:1]: SO_REUSEADDR option set on accept socket > > 2005.07.21 11:13:07 LOG7[2462:1]: mysql bound to 127.0.0.1:3306 > > 2005.07.21 11:13:07 LOG7[2463:1]: Created pid file /stunnel.pid > > 2005.07.21 11:15:58 LOG5[2463:0]: Received signal 15; terminating > > 2005.07.21 11:15:58 LOG7[2463:0]: removing pid file /stunnel.pid > > > > And i think the last 2 lines are not normal!! > > But how can i see from where come the SIGTERM ?? There is always a stunnel > > process but it doesn't work properly... > > > > Any idea? > > > > -------- Original Message -------- > > Subject: Re: Re-2: [stunnel-users] Problem with mysql (21-juil.-2005 9:13) > > From: bri(a)stunnel.org > > To: lmarcilly(a)aressi.fr > > > > > > > > > > > > How to do this? I try with : > > > > mysql --port=3306 --protocol=TCP -u user --password=xxx > > > > > > > > but it won't work... > > > > > > > > When i try telnet localhost 3306, i can't establish connection but i can on > > > > > > > > > > > > my windows box... I also try to analyse traffic with tcpdump and there is > > > > no packet when i try with stunnel... > > > > > > I've found in the past that mysql when pointing to localhost has > > > used the socket in spite of the arguments you put on the command line. > > > > > > Try pointing to the ethernet IP address instead of 127.0.0.1 and > > > see if it's happy then. You never know... > > > > > > -- > > > Brian Hatch "I've decided I'm not keen on > > > Systems and preterm labour." > > > Security Engineer "I'll write that down in our > > > http://www.ifokr.org/bri/ birthing plan..." > > > --Bree and Bri, in L&D. > > > Every message PGP signed > > > > > > > > > To: bri(a)stunnel.org > > Cc: Michal.Trojnara(a)mobi-com.net > > stunnel-users(a)mirt.net > > > > > > > > _______________________________________________ > > stunnel-users mailing list > > stunnel-users(a)mirt.net > > http://stunnel.mirt.net/mailman/listinfo/stunnel-users > > > To: lmarcilly(a)aressi.fr > bri(a)stunnel.org > Cc: stunnel-users(a)mirt.net To: lmarcilly(a)aressi.fr bri(a)stunnel.org Cc: stunnel-users(a)mirt.net

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stunnel-users