Hello,

I have problems with net/l2tpd. The people at their mailing list can't help me and it 
seems to be a problem with pppd, so I write to the list.

Situation:
I'm using L2TP over IPsec to secure a wireless lan. The lan connection itself works 
fine. The IPsec connection works fine (transport mode).

System:
FreeBSD 5.2-RELEASE-p2

Problem:
When I'm transfering a large file (it is *reproducable* with 
mozilla-source-1.6.tar.gz) transfer via ftp over the L2TP connection, the connections 
always stalls at the same point (number of transfered bytes). This also happens 
without IPSec.

I had a look with ethereal at the L2TP traffic, L2TP packets are fine, but the ppp 
packets insist mostly of 0x00 and ethereal reports 'bad ppp content type'. The file 
contains a lot of 0x00 at the position the transfer stalls. L2tpd uses pppd for the 
ppp connection. I tried setting MRU and MTU, but that doesn't help much (the number of 
transfered byte grew about 100). Disabling VJ header compression seems to have 
positive effect, too.

Questions:
Are there any issues known with pppd 2.3.5? 
Any ideas? 
Can anybody verify this?

Regards
Markus Dolze
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