FreeBSD 7.0 and pf

Norman Maurer norman at
Tue Mar 18 23:56:58 PDT 2008

Hi all,

im using freebsd 7.0  + gif interfaces + racoon + pf to filter stuff on
my box. After upgrading to freebsd 7.0 I see some strange behavior. I
see packets get dropped because of bad hdr length. The problems only
seems to happen on traffic between the local nets and nets routed via
ipsec. Here is a tcpdump snipped:

block in on em5: >  tcp 544 [bad
hdr length 12 - too short, < 20]

gif interface:
gif5: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1402
        tunnel inet -->
        inet --> netmask 0xffffff00 

Any help is welcome.


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