[Openswan Users] 1.0.8, strange problem with pings

mcr mcr at sandelman.ottawa.on.ca
Wed May 18 23:17:20 CEST 2005


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>>>>> "Paul" == Paul Wouters <paul at xelerance.com> writes:
    >>> Is your link perhaps congested?  Is there a icmp rate limit in
    >>> the firewall?
    >> No.

    >>>> But other (not icmp) traffic works OK:

    >> There are no retransmissions.  Again, if I ping from one host all
    >> is ok, if I ping from another packets are in ipsecX, but not in
    >> ethX...  100% reproducable until ipsec restart, after restart
    >> another host can't ping...

    >> Unfortunately this is software problem, I'm shure..

    Paul> Then I'm afraid the only way I can think of to see what is
    Paul> really happening is to run with plutodebug=all and
    Paul> klipsdebug=all, and running a few tcpdump captures so we get a
    Paul> copy of the entire situation when these packets
    Paul> "vanish". However, you cannot run long in such a configuration
    Paul> because this will generate a lot of logging to disk.

    Paul> Perhaps Michael has another suggestion?

  you can dispense with plutodebug=all, that won't help/hinder.
  (reduces the logs a bit)

  klipsdebug, you can restrict this to "rcv" or "tunnel-xmit".
  I'm unclear from the description if this is upon receipt or sending
that packets are going missing.  
  
  Certainly, tcpdump on all interfaces to be sure...

- -- 
] 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[
] panic("Just another Debian GNU/Linux using, kernel hacking, security guy"); [

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