63 lines
2.1 KiB
Plaintext
63 lines
2.1 KiB
Plaintext
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# $NetBSD: example.sr,v 1.1.1.1 1999/12/11 22:24:12 veego Exp $
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#
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# log all inbound packet on le0 which has IP options present
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#
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log in on le0 from any to any with ipopts
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#
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# block any inbound packets on le0 which are fragmented and "too short" to
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# do any meaningful comparison on. This actually only applies to TCP
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# packets which can be missing the flags/ports (depending on which part
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# of the fragment you see).
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#
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block in log quick on le0 from any to any with short frag
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#
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# log all inbound TCP packets with the SYN flag (only) set
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# (NOTE: if it were an inbound TCP packet with the SYN flag set and it
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# had IP options present, this rule and the above would cause it
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# to be logged twice).
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#
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log in on le0 proto tcp from any to any flags S/SA
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#
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# block and log any inbound ICMP unreachables
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#
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block in log on le0 proto icmp from any to any icmp-type unreach
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#
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# block and log any inbound UDP packets on le0 which are going to port 2049
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# (the NFS port).
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#
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block in log on le0 proto udp from any to any port = 2049
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#
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# quickly allow any packets to/from a particular pair of hosts
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#
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pass in quick from any to 10.1.3.2/32
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pass in quick from any to 10.1.0.13/32
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pass in quick from 10.1.3.2/32 to any
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pass in quick from 10.1.0.13/32 to any
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#
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# block (and stop matching) any packet with IP options present.
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#
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block in quick on le0 from any to any with ipopts
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#
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# allow any packet through
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#
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pass in from any to any
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#
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# block any inbound UDP packets destined for these subnets.
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#
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block in on le0 proto udp from any to 10.1.3.0/24
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block in on le0 proto udp from any to 10.1.1.0/24
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block in on le0 proto udp from any to 10.1.2.0/24
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#
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# block any inbound TCP packets with only the SYN flag set that are
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# destined for these subnets.
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#
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block in on le0 proto tcp from any to 10.1.3.0/24 flags S/SA
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block in on le0 proto tcp from any to 10.1.2.0/24 flags S/SA
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block in on le0 proto tcp from any to 10.1.1.0/24 flags S/SA
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#
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# block any inbound ICMP packets destined for these subnets.
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#
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block in on le0 proto icmp from any to 10.1.3.0/24
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block in on le0 proto icmp from any to 10.1.1.0/24
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block in on le0 proto icmp from any to 10.1.2.0/24
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