[Openswan dev] Openswan 2.3.1/2.4.0rc1 instability with L2TP

Michael Richardson mcr at xelerance.com
Mon Aug 22 23:44:53 CEST 2005


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>>>>> "Norbert" == Norbert Wegener <nw at sbs.de> writes:
    Norbert> Further analysis showed, that when using a netkey kernel
    Norbert> instead of KLIPS and openswan-2.4.0rc1 , everything worked
    Norbert> as expected.  So the problem seems to be only partially
    Norbert> causes by the fragment_size miscalculation. The main reason
    Norbert> seems to be related to KLIPS.  Norbert Wegener

  tcpdump -i ipsec0 -w /tmp/ipsec0.pcap -s 1600 
  tcpdump -i eth1 -w /tmp/eth0.pcap -s 1600

  on the server end of things. (assuming eth1 is your external
interface)

  I have been told that there are issues with fragmentation of
transport-mode packets.  Don't ask me what I think of L2TP.

- -- 
] Michael Richardson          Xelerance Corporation, Ottawa, ON |  firewalls  [
] mcr @ xelerance.com           Now doing IPsec training, see   |net architect[
] http://www.sandelman.ca/mcr/    www.xelerance.com/training/   |device driver[
]                    I'm a dad: http://www.sandelman.ca/lrmr/                 [
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