Ok, running Redhat 9 (dual boot with WinXP), Conexant HCF modem, and the KPPP dialer. Dials up just fine - I just can't do anything once I get on. Browsers refuse to resolve addresses and pinging doesn't do anything. The dialer is configured to make ppp0 the default route while connected - DNS settings are right, access number is good, etc.

What's real odd about this is that it worked perfectly once. I shut down without changing any settings and went back to XP for a bit, came back to Redhat and the connection quit working again. Has anyone run into any similar problems with this?

Well it is a winmodem, do you have the drivers www.linmodems.org

Yeah - I got the driver for it off of http://www.linuxant.com. What's bugging me is that it did actually work once ... and I can't think of anything I changed that caused it to quit working after I rebooted.