Please bear with me guys - I am having a bit of trouble all in all, getting my Debian system to work nicely ( I love it though).
I have set up a PPP connection to my ISP (Freeserve in UK). Connection gets established OK - ifconfig shows it's up and routing tables have sensible entries. However I am only able to successfully ping the IP address at the other end of the PPP connection. If I ping anything else - despite the fact that my modem lights seem to indicate a packet is returned - ping insists that no packets have been received. Could this be another inadvertant firewall problem? I spent all weekend scratching my head - looking at every book under the sun.