Sorry for the lame post but I'm really stuck with this and got nowhere to turn. Anyway, here's my problem:
I need to close all external traffic (eth0:0) to my server from execpt on a few ports (smtp, http, ping, echo, etc) and for my local network I need, in addition to those ports, SMB. So, as a test I came up with the following tables (for now I'm allowing all local traffic):
Chain INPUT (policy DROP 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination 15521 3812K ACCEPT all -- !eth0:0 * !192.168.1.3 !192.168.1.3 0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp flags:0x10/0x10
0 0 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state ESTABLISHED
0 0 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED
0 0 ACCEPT udp -- * * 0.0.0.0/0 0.0.0.0/0 udp spt:53 dpts:1024:65535
0 0 ACCEPT icmp -- * * 0.0.0.0/0 0.0.0.0/0 icmp type 0
0 0 ACCEPT icmp -- * * 0.0.0.0/0 0.0.0.0/0 icmp type 3
0 0 ACCEPT icmp -- * * 0.0.0.0/0 0.0.0.0/0 icmp type 4
0 0 ACCEPT icmp -- * * 0.0.0.0/0 0.0.0.0/0 icmp type 11
0 0 ACCEPT icmp -- * * 0.0.0.0/0 0.0.0.0/0 icmp type 12
0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:22
0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:113
0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:25
0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:80
0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:10000
0 0 SMB all -- * * 192.168.1.0/24 192.168.1.0/24
Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination 0 0 SMB all -- * * 0.0.0.0/0 0.0.0.0/0
Chain OUTPUT (policy ACCEPT 20416 packets, 20M bytes)
pkts bytes target prot opt in out source destination 15938 16M SMB all -- * * 192.168.1.0/24 192.168.1.0/24
Chain SMB (3 references)
pkts bytes target prot opt in out source destination 10 1111 ACCEPT tcp -- * * !192.168.1.3 !192.168.1.3 tcp multiport dports 135,136,137,138,139,445
4 499 ACCEPT udp -- * * !192.168.1.3 !192.168.1.3 udp multiport sports 135,136,137,138,139,445
However, when I run a portscan I get the following, I'm particularly worried about ports 139 and 3306 being open:
21 ftp File Transfer [Control] 22 ssh Secure Shell Login 25 smtp Simple Mail Transfer 37 time timserver 80 http World Wide Web HTTP 111 sunrpc portmapper, rpcbind 139 netbios-ssn NETBIOS Session Service 143 imap2 Interim Mail Access Protocol v2 443 https secure http (SSL) 587 submission - 3306 mysql mySQL 10000 snet-sensor-mgmt SecureNet Pro Sensor https management server
Can anyone shed some light on this?
Thanx.
--- avast! Antivirus: Outbound message clean. Virus Database (VPS): 0450-1, 09/12/2004 Tested on: 9/12/2004 13:47:30 avast! - copyright (c) 2000-2004 ALWIL Software. http://www.avast.com
