[Openswan Users] leftnexthop ppp fc6

Marek Greško gresko at thr.sk
Sat Nov 11 06:09:48 EST 2006


I found an interresting issue using openswan/netkey on fc6. While I was using 
openswan before and had running setup with leftnexthop=%defaultroute I was 
quite unhappy after upgrading to fc6 seeing my setup is not working any more.

After some examination I found that using ppp in fc6 there is no G flag in 
routing table for default route and therefore openswan does not get 
defaultroute in ipsec showdefaults so the leftnexthop=%defaultroute does not 
work any more. But when I commented it out e. g. changed to 
leftnexthop=%direct everything is working again.

I have two questions:

1. Is it a bug of ppp (or any other component of fc6) that it does not set the 
G flag into routing table for default gateway or is it a bug of openswan, 
that it does not resolv the default route as default route when the G flag is 
not set?

2. Is the solution with leftnexthop=%direct correct? I think yes, because the 
routes before was also created as if it was direct (no gateway was filled 
in). But maybe it would make some sense when using KLIPS. Can you give me 
proper explanation?

Thank you

Marek Greško
systémový administrátor
THR Systems, a. s.

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