UDP Packet reassembly

Mike Tancsa mike at sentex.net
Thu Jul 28 19:36:22 UTC 2011

On 7/28/2011 3:01 PM, Stephen Clark wrote:
> Hello List,
> Could someone enlighten me as to when FreeBSD 6.3 does UDP packet
> reassembly?
> I am having a problem where I am getting a fragmented udp packet (2
> pieces) everthing is
> fine if I get the first frag first. but if the second frag comes first
> then both fragments get dropped.
> I am using ipfilter and a bimap to redirect these packets to a host
> inside of the FreeBSD box,
> so I suspicion it is ipfilter causing the drops.

Not sure, but you try pf instead ?  And use

scrub log fragment reassemble


> I know, I know 6.3 is ancient history, but any insight would be
> appreciated.
> Thank,
> Steve

Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike at sentex.net
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada   http://www.tancsa.com/

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