Problems with pppoed performance when configured with mppe
Emil Filipov
tie at einet.bg
Thu Jan 15 04:54:05 PST 2004
Hi,
I am trying to configure a secure pppoe server.So far it works perfectly with Windows clients authenticating with MSChapv2. However, if MPPE is negotiated, the client receives only about 1/4th(30-40 kbytes/s) of the bandwidth available while downloading.
Download seem 'leapy' : it starts with high speed , then for a second or two it stops completely then it bursts again. I'm not quite sure why this happens, but everything goes back to normal when mppe is turned off. I assume that this is due to the re-initialised key on every 256th packet. Anybody seen that?
I tried different key lengths for the mppe but nothing changed. I haven't tried the stateless encryption though, beacuse the clients reject it.
Here are the details :
FreeBSD 4.9-STABLE
pppoe:
allow users
enable chap
enable pap
enable mschap
enable mschapv2
enable mppe
set mppe 40 stateful
disable deflate pred1 utmp vjcomp ipv6cp ccp
deny deflate pred1 utmp vjcomp ipv6cp ccp
allow mode direct
set mru 1492
set mtu 1492
set speed sync
set ifaddr 10.0.0.1 10.0.0.15-10.0.0.20
set log connect command chap lcp error alert warning
Regards,
Emil Filipov
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