blob: bcb1e92b15be6fd08011249c331abfa21d73bf67 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
#!/bin/sh
#
# firewall-standalone This script sets up firewall rules for a standalone
# machine
#
# Copyright (C) 2000 Roaring Penguin Software Inc. This software may
# be distributed under the terms of the GNU General Public License, version
# 2 or any later version.
# Interface to Internet
EXTIF=ppp+
ANY=0.0.0.0/0
ipchains -P input ACCEPT
ipchains -P output ACCEPT
ipchains -P forward DENY
ipchains -F forward
ipchains -F input
ipchains -F output
# Deny TCP and UDP packets to privileged ports
ipchains -A input -l -i $EXTIF -d $ANY 0:1023 -p udp -j DENY
ipchains -A input -l -i $EXTIF -d $ANY 0:1023 -p tcp -j DENY
# Deny TCP connection attempts
ipchains -A input -l -i $EXTIF -p tcp -y -j DENY
# Deny ICMP echo-requests
ipchains -A input -l -i $EXTIF -s $ANY echo-request -p icmp -j DENY
|