Netbios over Firewall

[infocis]

My worksation have to pass a PIX firewall to reach Windows server. When I use a net use, is long to get the files and directory. A need to wait 30 sec before have them. If a use another service on the server like FTP or HTTP, I don't have this problem. Only With NetBios I have a problem. What I need to change to correct the problem?

[ph0enix]

Make sure NetBIOS over TCP/IP is enabled on the Windows machines, then allow the following ports through the firewall:

TCP: 135, 139, 445

UDP: 135, 137, 138, 139

[infocis]

I found my problem. I need to open the ICMP

[ph0enix]

Interesting, I have a server on a DMZ segment that's not pingable (ICMP is blocked) but "net use" to it works instantaneously - perhaps that's because I have the server's name mapped via WINS and DNS.