Ports that Samba uses

Samba uses NetBIOS ports 137,138 udp and 139 tcp. It also uses port 445 for SMB file sharing without NetBIOS.

Sample iptables rules for Samba:

SAMBA_SERVER=”192.168.1.100″

NETWORK=”192.168.1.0/24″

BROADCAST=”192.168.255.255″
iptables -A INPUT -i lo -j ACCEPT

iptables -A OUTPUT -o lo -j ACCEPT

iptables -A INPUT -p udp -s $NETWORK -d $SAMBA_SERVER -m multiport –dports 137,138 -j ACCEPT

iptables -A INPUT -p tcp -s $NETWORK -d $SAMBA_SERVER -m multiport –dports 139,445 -j ACCEPT

iptables -A INPUT -p udp -s $NETWORK -d $BROADCAST –dport 137 -j ACCEPT

iptables -A INPUT -p udp -d $SAMBA_SERVER -m multiport –dports 137,138 -j DROP

iptables -A INPUT -p tcp -d $SAMBA_SERVER -m multiport –dports 139,445 -j DROP

iptables -A OUTPUT -s $SAMBA_SERVER -d $NETWORK -m state –state ESTABLISHED, RELATED -j ACCEPT

© 2010, Joseph Griffiths. All rights reserved.

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