stunnel-users

3306 discussions

nonblocking: Operation not supported by this device (19)
by Tuc＠T-B-O-H 09 Aug '05

09 Aug '05

Hi, This morning I stopped using the splash screen on boot on my FreeBSD 4.11 system, using stunnel 4.11 and now when I use stunnel I get: "stunnel[PID]: nonblocking: Operation not supported by device (19)" Why would changing if I use a splash screen or not make this difference?! Thanks, Tuc

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Any examples of Stunnel usage in "enterprise environments"?
by Claus Lund 06 Aug '05

06 Aug '05

Hi everybody, I was just wondering if there are any public examples of widespread Stunnel usage in an enterprise environments? I'm a UNIX admin where I work and we are currently working on trying to find a solution for encrypting all network traffic to and from the UNIX machines (all the clients are using Windows boxes). We are running a variety of services on the boxes including Samba, homegrown services for our 3-tier app, Oracle, DB2 etc... I already have proof of concept setups for every network service that we offer but I think some "real-world examples" would go a long to convince my boss (and the Windows admins) that Stunnel is a viable option for us. Thank you in advance, Claus

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Re: [stunnel-users] Stunnel dumping core
by Andrew Gay 05 Aug '05

05 Aug '05

> Envelope-to: gay@localhost > Delivery-date: Thu, 04 Aug 2005 16:49:55 +0100 Michael Tronjara wrote: > Politeness is required on this list. *plonk* > > Mike Michael, might I suggest your understanding of that word differs from the majority of us on this list. Many times people have written in pointing out problems with stunnel crashing, dumping core, locking up, yet all you can offer is 'never report problems with older versions', 'you have no right to complain', etc etc, and now you have the arrogance to tell us all we have no clue how to report bugs. I get the feeling you are upset because so many of us discover problems with this software. Andrew

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RE: [stunnel-users] Stunnel dumping core
by Stephen Tanner 04 Aug '05

04 Aug '05

I was trying to see if it was a common issue when stunnel is unable to connect. I didn't ask for snide remarks. -----Original Message----- From: stunnel-users-bounces(a)mirt.net [mailto:[email protected]] On Behalf Of Michal Trojnara Sent: Thursday, August 04, 2005 3:48 AM To: stunnel-users(a)mirt.net Subject: Re: [stunnel-users] Stunnel dumping core "Stephen Tanner" <stanner(a)leeclerk.org> wrote: > Sometimes shutting it down while > it is doing this, it will dump core. Here is an axample of a good core dump error report. http://stunnel.mirt.net/pipermail/stunnel-users/2004-August/000009.html http://stunnel.mirt.net/pipermail/stunnel-users/2004-August/000015.html The report should include at least: - stunnel version line (for example "stunnel 4.05 on powerpc-ibm-aix5.2.0.0 FORK with OpenSSL 0.9.7d 17 Mar 2004"). - stack backtrace. It's a good idea to read: http://www.chiark.greenend.org.uk/~sgtatham/bugs.html Best regards, Mike _______________________________________________ stunnel-users mailing list stunnel-users(a)mirt.net http://stunnel.mirt.net/mailman/listinfo/stunnel-users

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Stunnel dumping core
by Stephen Tanner 04 Aug '05

04 Aug '05

I've been running stunnel to tunnel syslog-ng messages to a loghost. On some occasions, be it a network maintenance issue or fluke, if a server loses connection to the loghost, stunnel starts spewing broken pipe messages to syslog. Sometimes shutting it down while it is doing this, it will dump core. Anyone have an idea on what might be causing this? =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Stephen Tanner HP-UX Systems Administrator Network Support Services Lee County Clerk of Courts =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

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Error resolving '...' (Windows)
by Oliver Ackermann (infowing AG) 03 Aug '05

03 Aug '05

On a Windows 2000 machine I always get the following error when I try to start stunnel (4.11): Error resolving 'x.y.z.23': Neither nodename nor servname known (EAI_NONAME) The client should connect to a server using SSL. x.y.z.23 is a static IP address of the client. The client has multiple IP addresses and stunnel should use this one to connect to the server. Contents of stunnel.conf: client=yes [service] local=x.y.z.23 accept=12345 connect=server:12345 Why does stunnel try to "resolve" this IP? Is the configuration correct? Thanks for your help! Oliver

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ftp support for stunnel-4.11 (still has errors, do not know why)
by ZHUANG YUYAO 03 Aug '05

03 Aug '05

hi, here is the initial patch (pre-pre-pre-alpha! just a demo/test) for adding ftp support to stunnel-4.11. Known bugs: 1) only tested under linux. debian 3.1 (testing), gcc version 3.3.5 (Debian 1:3.3.5-13) 2) ftp_alloc_port() in ftp.c is not yet finished. just a demo; 3) only works when configured with --with-threads=ucontext. does not work with --with-threads=pthread! 4) libwrap support is not tested. 5) only tested with flashfxp (3.0.2 build(1043) implicit SSL); 6) still contains memory leaks. 7) can only successfully transfer(RETR) small files whose size is less than about 90K bytes. stunnel hangs while transferring a larger file, looks like poll() in scan_waiting_queue() (network.c line 164) can not receive a POLLOUT event from ssl_wfd->fd after successfully transfered 90K bytes. the log file is also included in this mail. bug #7 really frustrats me. still do not know why. could anyone please give me some hints? Zhuang Yuyao.

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some thoughts of add ftp server proxy support to stunnel4. comments required
by ZHUANG YUYAO 30 Jul '05

30 Jul '05

Hi, I am thinking about adding ftp protocol support to stunnel4. first, some restrictions to simplify the implimentation: 1) only support for stunnel running in server mode, users can use ftp clients which support ssl connection (ie. FlashFXP) to connect to the real ftp server through stunnel daemon; 2) only support standalone service mode of stunnel. (inted support may be added later, I've just read the source code related to standalone service, and have not got any clue about how to support inetd.) 3) only support FTP implicit SSL and PASSIVE mode; the code may look like this: (the real ftp server is at 192.168.10.254, listening on port 21.) 1) start a stunnel daemon nonmally with accept = 990, remote = 192.168.10.254:21, protocol = ftp; 2) when a connection come in, parse the ftp server response, search for "227 Entering Passive Mode (192,168,10,254,133,22)", then got the data connection IP: 192.168.10.254 PORT: 34070; 3) plus 1 to the data connction port 34070, then we got 34071 which will be used as stunnel accept port; 4) create a LOCAL_OPTIONS structure instance opt (prototypes.h) dynamically, set opt->accept=1, opt->local_addr same to the parent stunnel, change its port to 34071, opt->remote_addr = real data connection (IP: 192.168.10.254 PORT: 34070); opt->fd = socket(), bind(); 5) set local_option->next = opt; 6) s_poll_add (&fds, opt->fd, 1, 0); (stunnel.c) (the local variable fds needs to be changed to a global variable, by the way, I think it is also required if stunnel want real SIGHUP configuration-on-the-fly support) 7) changed server response to "227 Entering Passive Mode (STUNNEL_LOCAL_HOST,133,23)", then send back to client. 8) the client will then connect to STUNNEL_LOCAL_HOST port = 34071, negotiate SSL session and send/receive data; 9) after ftp session finished (How to know a ftp session is finished?), free the dynamic LOCAL_OPTIONS opt, remove opt->fd from fds, close the data sessoin. There are only two source file (stunnel.c, protocol.c) need to be modified to implement these functions. Any suggestions will be appreciated. Thank you. Zhuang Yuyao 2005/7/28

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Configuration and startup?
by JACK ROBERT BIESIADECKI 29 Jul '05

29 Jul '05

Hi, I am new to stunnel and Linux. I am trying to set up a secure connection to a server which can be accessed from any web browser on a designated port. I need to be able to access a web browser server administration interface, this is over http, I need to make this an https connection. I have compiled and installed stunnel on a Linux machine (FC4) but can't seem to get any response from it or make it work. If anyone can explain, step by step, how to configure stunnel for general https usage, it would be greatly appreciated. I have looked through the documentation but I have not been able to get it to work. I have also noticed that webmin supports stunnel but there is nothing in it. I added this to the conf file: [https] accept = 8080 connect = 28477 TIMEOUTclose = 0 Thanks

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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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