referring to own IP in filter rules

Hello,

Is there a convenient way to refer to my machine's own IP address in diald filter rules, where the address is assigned dynamically by my ISP when I dial in?

I've been using diald for several years and it works fine. My problem is that increasingly I find that the line is being kept up by attempted connections from random sites. I take it these are hackers, or machines that have been hijacked by hackers. As far as I can tell, my firewall and tcp wrappers are successfully rejecting the connection attempts so far, but diald is opening a connection set for them and giving it a default timeout. What I'd like to do is write a rule saying something like "ignore any packet addressed to a port number lower than 900 on my machine", but the address of my machine is different each time I dial up.

I can imagine writing an ip-up script that uses sed to rewrite the standard.filter file after the link comes up and then sends a reset to diald.ctl, but that sounds messy and error-prone and I'd rather write standard.filter to say what I really mean in the first place, if there is some way of doing it.

Thanks.

Stephen Isard