On Tue, Mar 30, 2010 at 06:22:39PM +0200, Mirco Piccin wrote:
> Hi,
> 
> >> In my setup ICMP packets are dropped by the firewall in front of the
> >> machine I need to backup. I have been searching for alternatives but
> >> haven't found anything yet. Any pointers to a fix? Any other way to let
> >> BackupPC know he machine is alive?
> >
> >What ports are available?
> >could something like httping be used as a substitute for /bin/ping?
> 
> i remember i use - not with BackupPC - a perl script that allow to probe any
> host port (both TCP anf UDP ) - and also ping.
> It use both Net::Ping and Socket.
> 
> The solution could be something like that, or simply a telnet to a specific
> port and work with output.
> Just run nmap to that host to see available port.

I've been using netcat -z $host $port for easy "is that port open?" tests.
You'll need rsyncd or ssh access anyway, so just check these ports.

HTH,

Tino.

-- 
"What we nourish flourishes." - "Was wir nähren erblüht."

www.lichtkreis-chemnitz.de
www.tisc.de

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