[cobalt-users] Security/Firewall advice

["Paul Shuttleworth" <Paul@xxxxxxxxxx>]

Hi All

As a newbie myself I WILL risk the flames and the wrath of the group and ask
a question!!! ;-)

I have just put our RAQ4r in with the co-lo yesterday and all is well with
the world (well it will be as soon as I have persuaded my firewall to let me
SSH from my machine to the box... but that's my problem) anyway, I have set
up portsentry and ip chains ready to implement and configure. Whilst talking
to the techie at my co-lo it seems they run a firewall on the incoming side
of their network, the only ports they have open by default are
80,20,21,22,110,25 I have asked them to open 81 also for admin. My question
is should I still set up portsentry/ipchains to help prevent attacks ? ( I
could still get attacked from within right?) and also can anyone see any
other ports that would be a good idea to ask them to open up ( I read some
posts on ipchains requiring port 53?) any advice appreciated.

Cheers
Paul.