About:
OpenSSH Heartbeat/Watchdog Patch adds a heartbeat (keepalive) function to ssh(1). If the output channel has been silent for more than a specified time, a null message (SSH_MSG_IGNORE) is sent to the server as a heartbeat. The heartbeat is useful for keeping connections over IP masquerade/NAT boxes, firewalls, etc. This patch also adds a watchdog timeout function to sshd(8). The combination of the heartbeat and the watchdog timeout is very useful for detecting a link which is down over unreliable connections such as a wireless network.

Author:
Hideaki Goto [contact developer]

Rating:	reset 1 2 3 4 5 6 7 8 9 10
(not rated)

Homepage:
http://www.sc.isc.tohoku.ac.jp/~hgot/sources/openssh-watchdog.html
Tar/GZ:
http://www.sc.isc.tohoku.ac.jp/[..]sources/openssh-4.4p1-watchdog.patch.tgz
Changelog:
http://www.sc.isc.tohoku.ac.jp/~hgot/sources/CHANGES-openssh-watchdog

Trove categories: [change]

[License]		OSI Approved :: BSD License (revised)
[Operating System]		Unix
[Programming Language]		C
[Topic]		Internet, System :: Networking

Dependencies: [change]
No dependencies filed

 Branches

Branch	Version	Last release	License	URLs
Default	4.4p1	01-Oct-2006	BSD License (revised)

 Comments

[»] usefulness ?
by mmu_man - Mar 11th 2005 23:24:19

I don't have problems anymore with my NAT router after I added "-o ServerAliveInterval=60" to the ssh command line setting up the tunnel here (using 3.9p1). Is that thing really needed ?

[reply] [top]

[»] Re: usefulness ?
by Hideaki Goto - Mar 12th 2005 01:29:01

This patch might be useless if you are lucky enough to have no SSH1 server around you. More importantly, this patch (especially the latter half part) was originally developed to be used with the Authenticating Gateway.

[reply] [top]

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