Ubuntu – UFW firewall still blocking SMB despite adding rules

firewallsambaufw

I have an Ubuntu PC with ufw firewall (GUI version). I have added the preset Samba service, in and out, and even tried adding the ports manually (135-139, 445, UDP and TCP, in and out), but it still blocks samba.

I am trying to access a share on another PC on my LAN. If I disable ufw, it works fine. It must be still blocking something and I can't figure it out. Any ideas?

I'm on Ubuntu 11.04 beta 2.

Best Answer

Try this:

As root, open /etc/default/ufw

Look for the line like this:

IPT_MODULES="nf_conntrack_ftp nf_nat_ftp nf_conntrack_irc nf_nat_irc"

Add nf_conntrack_netbios_ns to the line so that it looks like this:

IPT_MODULES="nf_conntrack_ftp nf_nat_ftp nf_conntrack_irc nf_nat_irc nf_conntrack_netbios_ns"

Now reload the firewall:

sudo ufw reload