[Openswan Users] Unusual packet loss
paul at xelerance.com
Mon Jan 24 12:07:25 CET 2005
On Mon, 24 Jan 2005, Philip Burrow wrote:
> To my point, I'm having an unusual problem with apparent packet loss across a
> tunnel. Let me describe the set up. I have two machines running Fedora 2,
> with 2.6.10 kernel and Openswan 2.3.0. Both are on ADSL connections with 256k
> upstream operated by the same ISP.
Do you have the xfrm4_tunnel kernel module? If so, did you load it?
> Another example of strangeness is if I try and FTP across the tunnel. I can
> log in and such, as expected, but it hangs when I request a directory
This definately seems like compression (xfrm4_tunnel needed) or mtu problems.
> Any suggestions as to what may be causing this? From what I read in the
> documentation it looks like MTU may be involved but I don't see why it would
> be, and don't know what I can do to play with it. Guidance would be
I assume you're usig NETKEY, so try changing the mtu to something lower on
both ends on the physical interface, eg ethX/pppX
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