The host was multi-homed, and when the 1x RTT link came up the default
route was swung onto the link. Existing connections began to emit
packets to the modem link with a source IP corresponding to the previous
default route. It was these packets which caused the reconfiguration.
I'm not doing any sort of multihoming so there is no default route
until the ppp connection comes up. No invalid packets should be making
it to the ISP but I'll do a capture and see what comes up...
What comes up are packets from a host in my local network getting sent
out over ppp! Every time a packet with the source from my internal
network gets sent over ppp, the connection reconfigures. You were
exactly right! What I'm seeing is packets being sent out over ppp such as
192.168.0.10 -> google.com
Which means that my iptables NAT script isn't doing its job. I've never
claimed to be an iptables expert which is why I've always used
MonMotha's iptables firewall. I guess its time to learn....
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