Package: openssh-server Version: 1:5.1p1-7 Severity: normal Hi,
I can only reach most of my systems through a dual-homed host which I access via proxycommand ssh dhhost socket %h %p. When I use controlmaster, there seems to be a rather low session limit of around ten sessions which can be tunneled through. When this limit is reached, the server logs "error: no more sessions" and the client holding the controlmaster spews "open failed: administratively prohibited: open failed" to its console. In some cases, closing one of the sessions does not immediately free up a "slot", but new connections become possible after waiting a few minutes. Googling for the error message suggests that there is a macro MAX_SESSIONS which can be increased, but the current sources only contain this string inside debian/changelog when it was documented that this macro was increased to 64 somewhen in 2007. So I suspect that this is now dynamically allocated, eliminating the macro from the sources. However, the limit remains and is a rather severe limitation especially when a security update needs to be rolled out (I do this in parallel and frequently hit this limit). Greetings Marc -- System Information: Debian Release: squeeze/sid APT prefers unstable APT policy: (500, 'unstable') Architecture: i386 (i686) Kernel: Linux 2.6.30.5-nc8000 (PREEMPT) Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Versions of packages openssh-server depends on: ii adduser 3.110 add and remove users and groups ii debconf [debconf-2.0] 1.5.27 Debian configuration management sy ii dpkg 1.15.3.1 Debian package management system ii libc6 2.9-25 GNU C Library: Shared libraries ii libcomerr2 1.41.8-2 common error description library ii libgssapi-krb5-2 1.7dfsg~beta3-1 MIT Kerberos runtime libraries - k ii libk5crypto3 1.7dfsg~beta3-1 MIT Kerberos runtime libraries - C ii libkrb5-3 1.7dfsg~beta3-1 MIT Kerberos runtime libraries ii libpam-modules 1.0.1-10 Pluggable Authentication Modules f ii libpam-runtime 1.0.1-10 Runtime support for the PAM librar ii libpam0g 1.0.1-10 Pluggable Authentication Modules l ii libselinux1 2.0.85-1 SELinux shared libraries ii libssl0.9.8 0.9.8k-4 SSL shared libraries ii libwrap0 7.6.q-18 Wietse Venema's TCP wrappers libra ii lsb-base 3.2-23 Linux Standard Base 3.2 init scrip ii openssh-blacklist 0.4.1 list of default blacklisted OpenSS ii openssh-client 1:5.1p1-7 secure shell client, an rlogin/rsh ii procps 1:3.2.8-1 /proc file system utilities ii zlib1g 1:1.2.3.3.dfsg-15 compression library - runtime Versions of packages openssh-server recommends: ii openssh-blacklist-extra 0.4.1 list of non-default blacklisted Op ii xauth 1:1.0.3-2 X authentication utility Versions of packages openssh-server suggests: ii molly-guard 0.4.4-2 protects machines from accidental pn rssh <none> (no description available) ii ssh-askpass 1:1.2.4.1-7 under X, asks user for a passphras pn ufw <none> (no description available) -- debconf information excluded -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
