stunnel-users

stunnel-users@stunnel.org

6 participants
3294 discussions

problem with buffering data on stunnel
by wujot 09 Jul '15

09 Jul '15

I have a problem with transmission from LAN server, which use another server on LAN with running stunnel, to pass encrypted data to remote SSL clients if they are on very slow GPRS network. If server in LAN starts to transfer big amount of data to such slow remote client, stunnel is buffering data and slowly transmits them to the GPRS client. TCP Window on connection from LAN server to stunnel is big (64 - 131kB), and TCP Window on connection from stunnel to slow client is small (about 5kB). And additionally stunnel is buffering data. So, server is finishing transmission in seconds, but in fact most of data are still in buffers of stunnel. And it makes a timeout problem (server is waiting for the confirmation from client if it received all data, but time between last byte sent from server and confirmation from client could be even several minutes). So, stunnel is working in "store and forward" model. Is it possible to switch it to something like "cut through"? Or how to force stunnel to more synchronized transmission between client and server? Regards, Adalbert

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password protected key in client certificate
by Giona Il Profeta 03 Jul '15

03 Jul '15

Hi all, I have inherited an old stunnel installation, configured for mutual authentication (verify=3) and I'm trying to figure out some of the choices of the old sysadmin. One of the client certificates in the CApath directory has its private key encrypted with a password. Is the client supposed to provide the password to decrypt the key when it connects? Thank you G

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Older versions of stunnel
by daninho dj 03 Jul '15

03 Jul '15

Hi guys, Where can I find some older versions of stunnel? I would like to get 5.17 version. Thanks, Daninho

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Problem with read and unreald mails via POP3 SSL
by David Tedjo 30 Jun '15

30 Jun '15

Hi everybody, i bought an Logitech keyboard with display. I use now stunnel to bring my email account to my display. Logitech got a applet for this. Now i can use it but i got a problem with the unread mails. My display shows me 6 unread messages, but thats all my messages in my in-box and i read it already. Is this a problem of stunnel or a problem in the software of the keyboard? Best Regards David

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automation of installation of loopback adapter
by Saurabh Beriwal 29 Jun '15

29 Jun '15

Hi All, I'd like to programmatically install the MS loopback adapter to automate tunneling of SMB over SSH. All the code which i found on net uses MS devcon utility. Please let us know if there is any simple way to automate the installation of MS loopback adapter. Thank you. Regards, Saurabh Beriwal

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Re: [stunnel-users] installing stunnel on Mac Machine
by William Dockery 26 Jun '15

26 Jun '15

1. I’m an stunnel newbie. 2. I thought I would give the Mac install script a try: downloaded it to ~/Documents, did the chmod, and ran script; looks like it can’t create/find the config file? Is that something I need to do manually? WDDMBPW80336XHAGV:Documents williamdockery$ ./stunnel-5.20b8-osx [ ] Cron started [ ] Clients allowed=125 [.] stunnel 5.20 on x86_64-apple-darwin14.3.0 platform [.] Compiled/running with OpenSSL 0.9.8zd 8 Jan 2015 [.] Threading:PTHREAD Sockets:SELECT,IPv6 TLS:ENGINE,OCSP [ ] errno: (*__error()) [.] Reading configuration from file /etc/stunnel/stunnel.conf [!] Cannot open configuration file [.] [.] Syntax: [.] stunnel [<filename>] ] -fd <n> | -help | -version | -sockets [.] <filename> - use specified config file [.] -fd <n> - read the config file from a file descriptor [.] -help - get config file help [.] -version - display version and defaults [.] -sockets - display default socket options Thoughts? Thanks, William > > Message: 1 > Date: Thu, 25 Jun 2015 12:48:02 +0200 > From: Michal Trojnara <Michal.Trojnara(a)mirt.net> > Cc: stunnel-users(a)stunnel.org > Subject: Re: [stunnel-users] installing stunnel on Mac Machine > Message-ID: <558BDC62.9080606(a)mirt.net> > Content-Type: text/plain; charset=utf-8 > > Signed PGP part > On 25.06.2015 08:04, Saurabh Beriwal wrote: > > Is it possible to automate the installation on Mac machine? > > I built an executable for you: > ftp://ftp.stunnel.org/stunnel/stunnel-5.20b8-osx > Just copy to a directory, chmod a+x, and run it. > > Mike > >

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installing stunnel on Mac Machine
by Saurabh Beriwal 25 Jun '15

25 Jun '15

Hi All, I need to install stunnel on Mac machine. If someone has already done this in past , then please share the installation steps with me. Do we need to install anything like loopback adopter in Mac Machine. Regards, Saurabh Beriwal

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How to upgrade OpenSSL version that comes with Stunnel
by Paul Randall 24 Jun '15

24 Jun '15

Hi folks, Can you please tell me the process for swapping out the version of OpenSSL that comes with Stunnel for a newer version of OpenSSL? Is there a quick way to do this or does it require recompiling Stunnel? Thanks. Paul

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Stunnel windows installer
by Deepak Subbanarasimha 22 Jun '15

22 Jun '15

Hi, Is there an MSI installer available for Stunnel version 5.19 ? If so, has anyone tried to call the stunnel MSI installer from an Install shield installer? Thanks, DEEPAK SUBBANARASIMHA Kewill DDI: +00 (1) 978 482 2625 Email: deepak.subbanarasimha(a)kewill.com<mailto:deepak.subbanarasimha@kewill.com> www.kewill.com<http://www.kewill.com/> Tel: +00 (1) 978 482 2500 | Fax: +00 (1) 978 482 2501 1 Executive Drive, Chelmsford, MA 01824, USA IMPORTANT NOTICE: This email is intended solely for the use of the individual to whom it is addressed and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If the reader of this email is not the intended recipient or the employee or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify us by telephone at (978) 482-2500 and return the original message to us at the listed email address. In accordance with Kewill policy, emails sent and received may be monitored. Kewill accepts no responsibility for any loss or damage should this email contain any virus, or similar destructive or mischievous code. Thank You. Copyright (c) 2013 by Kewill Inc IMPORTANT NOTICE: This email is intended solely for the use of the individual to whom it is addressed and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If the reader of this email is not the intended recipient or the employee or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately return the original message to the sender at the listed email address. In accordance with Kewill policy, emails sent and received may be monitored. Although Kewill takes reasonable precautions to minimize the risk, Kewill accepts no responsibility for any loss or damage should this email contain any virus, or similar destructive or mischievous code.

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Re: [stunnel-users] stunnel 5.18 may keep high CPU usage
by Dod 22 Jun '15

22 Jun '15

Hello Michal, Same problem with 5.19b4 and nothing special in the logs. Now I know how to reproduce the problem instantly, I just have to put my computer in StanBy mode and Awake it. Using Process Explorer from Sysinternals I see that stunnel produce a permanent "Other I/O" flow when problem appear. I/O Other : "The rate at which the process is issuing bytes to I/O operations that do not involve data such as control operations. This counter counts all I/O activity generated by the process to include file, network and device I/Os." OtherI/O is confirmed by Process Monitor that trace no File nor Registry nor Network activity. But as stunnel still respond correctly to a Quit menu or any other menus and SSL requests I assumed that it may be some Thread going crazy so I compared running thread between normal stunnel behavior with the 25% CPU behavior and found that in fact there is a thread that do no terminate correctly. Here is the Thread's stack : MSVCR90.dll!_endThread+0x7d ntoskrnl.exe!memset+0x61a ntoskrnl.exe!KeWaitForMultipleObjects+0xd52 ntoskrnl.exe!KeWaitForSingleObject+0x19f ntoskrnl.exe!PoStartNextPowerIrp+0xba4 ntoskrnl.exe!PoStartNextPowerIrp+0x1821 ntoskrnl.exe!PoStartNextPowerIrp+0x1a97 ntoskrnl.exe!KeReleaseInStackQueuedSpinLock+0x5a afd.sys+0x61c1c afd.sys+0x51d3b ntoskrnl.exe!NtMapViewOfSection+0x15b7 ntoskrnl.exe!NtDeviceIoControlFile+0x56 ntoskrnl.exe!KeSynchronizeExecution+0x3a23 wow64cpu.dll!TurboDispatchJumpAddressEnd+0x6c0 wow64cpu.dll!TurboDispatchJumpAddressEnd+0x1fb wow64.dll!Wow64SystemServiceEx+0x1ce wow64.dll!Wow64LdrpInitialize+0x42a ntdll.dll!RtlIsDosDeviceName_U+0x1f5c4 ntdll.dll!LdrInitializeThunk+0xe ntdll.dll!NtDeviceIoControlFile+0x15 WS2_32.dll!select+0x9f stunnel.exe!OPENSSL_Applink+0xd3ec stunnel.exe!OPENSSL_Applink+0x961 Hope it help... regards. MT> Please try stunnel 5.19b4: MT> https://www.stunnel.org/downloads.html

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