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Re: Newbie and scan attack



DSC Siltec wrote:
> 
[cut]
> 
> One scan attack attacked my proxy server's proxy port, from 1031,1032,
> 1033,1034, 1035...  and expired about 8 minutes later.
> 
[cut]
> 
> I also have a windows system -- and, sometimes using the same network
> connection [manual plug-over] a macintosh, and it is possible that the
> attacks were coming through one of those.  But the Windows system has a
> good firewall "ZoneAlarm" that I can use and understand [I don't yet
> understand the Linux one] and McAfee antivirus with autoupdate.
> 
I'm going to make a wild guess here, but an educated one:

On your Windows machine:

Control Panel|Internet Properties|Connections|Lan Settings...

Does it have "Automatically detect settings" checked on?  I've always
suspected that must do a port scan on those ports.  Try turning that
puppy off.

(Any reason to think that ZoneAlarm would block those ports outgoing?  I
would not think that it would by default).

(Also, I don't know your network setup, but it seems odd to have
firewalling on each machine: typically that's just at the point of
Internet access). 

Ignore the people that say that Debian is just too hard for you, by the
way.  You've obviously made a lot of progress.  :-)


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