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Differential D26021

ipfw: improve matching on IPv4 fragments
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Authored by glebius on Aug 10 2020, 9:17 PM.
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rGe56b2f0b2804: MFC r364117 by glebius:
rS364117: ipfw: make the "frag" keyword accept additional options "mf",
Summary

Currently ipfw(8) allows to match on a packet being not a first fragment.
This prevents even such a simple rule as to block all fragmented packets.

This backward compatible enhancement allows to match explicitly on
IP_MF, IP_DF, even on IP_RF and on non-zero offset.

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rS FreeBSD src repository - subversion
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PathSize
head/
sbin/
ipfw/
33 lines
20 lines
sys/
netpfil/
ipfw/
18 lines

Diff 75680

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head/sbin/ipfw/ipfw.8

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head/sbin/ipfw/ipfw2.c

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head/sys/netpfil/ipfw/ip_fw2.c

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