On 3/30/2010 11:22 AM, 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.

You should be able to come up with a command that tests the port you 
need for the backup.  If you run over ssh, you could do something that 
will execute quickly like 'ssh root@target_IP id'  or if it is smb, an 
'nmblookup -A target_IP' might work.

-- 
   Les Mikesell
    lesmikesell AT gmail DOT com


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