59 lines
1.3 KiB
Plaintext
59 lines
1.3 KiB
Plaintext
#
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# $Id$
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#
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# An example of packet filter definition.
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#
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#
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filterd:
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#
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# Don't keep Alive with ICMP,DNS and RIP packet
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#
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set afilter 0 deny icmp
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set afilter 1 deny udp src eq 53
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set afilter 2 deny udp dst eq 53
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set afilter 3 deny udp src eq 520
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set afilter 4 deny udp dst eq 520
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set afilter 5 permit 0/0 0/0
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#
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# Don't dial with ICMP packet
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#
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set dfilter 0 deny icmp
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set dfilter 1 permit 0/0 0/0
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#
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# Allow ident packet pass through
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#
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set ifilter 0 permit tcp dst eq 113
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set ofilter 0 permit tcp src eq 113
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#
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# Allow telnet connection to the Internet
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#
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set ifilter 1 permit tcp src eq 23 estab
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set ofilter 1 permit tcp dst eq 23
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#
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# Allow ftp access to the Internet
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#
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set ifilter 2 permit tcp src eq 21 estab
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set ofilter 2 permit tcp dst eq 21
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set ifilter 3 permit tcp src eq 20 dst gt 1023
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set ofilter 3 permit tcp dst eq 20
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#
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# Allow access to DNS
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#
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set ifilter 4 permit udp src eq 53
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set ofilter 4 permit udp dst eq 53
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#
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# Allow access from/to my company network
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#
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set ifilter 5 permit 192.244.191.0/24 0/0
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set ofilter 5 permit 0/0 192.244.191.0/24
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#
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# Allow ping and traceroute response
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#
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set ifilter 6 permit icmp
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set ofilter 6 permit icmp
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set ifilter 7 permit udp dst gt 33433
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set ofilter 7 permit udp dst gt 33433
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#
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# If none of above rules matches, then packet is blockd.
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#
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