Connecting to network but not to internet in Ubuntu?

manic111 · 19 Aug 2009 at 22:47

I have a server based round Samba which I'm using to serve files across a network, but don't have any need for the server to be plugged into the network 24/7. I know that viruses are rare on Ubuntu, but it's not worth the risk if I have no need for it.

How can I leave the server connected to the network and serving files, but not connected to the internet?

john_s · 19 Aug 2009 at 23:24

Not a linux expert, just have a tinker every now and then, so others might have better ideas.

Firewall to block access to the net? I found Shorewall's pretty easy to use.

manic111 · 19 Aug 2009 at 23:34

Possibly a good shout, although it seems like a bit of a duck-tape bodge job!

john_s · 20 Aug 2009 at 09:40

The other thought I'd had was remove the default gateway (or change it to something invalid), so the box can't get network traffic out to the net, but that sounded like even more of a bodge!

rick827 · 20 Aug 2009 at 11:18

If you configure iptables/netfilter correctly I wouldnt call it a bodge job, its about as customisable/solid as you can get. If you wanted more i'd look at a hardware firewall to sit outside the box?

manic111 · 20 Aug 2009 at 16:36

Ok cool, I'll have a look. Cheers!

.walls · 20 Aug 2009 at 20:19

tcp wrappers is less secure than iptables - but it's a lot easier to configure.