Using kernel 2.4-pre8 I can not access www.ibm.com or www.cdw.com yet can access many other sites without problem. If I reboot into 2.2.17, I can access the sites just fine.
My reason for asking here is to do a quick poll of other Linux users who MIGHT be using the 2.4-pre kernels before I say anything on the kernel list. Maybe it is something goofy I did in my config but I don't think so.