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I am establishing an l2tp connection with IPSEC between two hosts and when the link comes up a route is added on the client side for 192/8 pointing out the newly established ppp interface. I can find no reference to 192/8 anywhere in /etc or in my home directory. Is this something built into the binary for some reason?

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up vote 2 down vote accepted

Opps, just found it. It was:

/sbin/route add -net `echo "${PPP_LOCAL}" | cut -d'.' -f1`.0.0.0 netmask dev ${PPP_IFACE}

in file /etc/ppp/ip-up

Strange that by default it wants to route the entire /8 of your pppd address, but that's easy enough to edit.

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