Only if it is a valid address that has been assigned to you and the ISP
is willing to route packets to that address and publish the route to
the rest of the world. Only if all three are true, in ppp/ip-up do
#!/bin/sh
# override the supplied IP address so outgoing connections from this
# host have my IP address instead of the provider's.
/sbin/ifconfig $1 my.assigned.ip.address
/sbin/route add $5 $1
/sbin/route add default gw $5
>Are there many ways to do this?
Only one that came out of several mails when I asked the same question.
It takes advantage of the fact that once the PPP link is established,
the ISP could not care less what your end calls itself as long as the
ISP knows how to route to the new address down the same link.