Weird routing issue
- by Joel Coel
I'm having some weird internet problems on campus. I know it's something simple, but it's a case where I need another set of eyes. I think I can explain the problem best by posting a tracert:
Tracing route to google.com [74.125.45.147]
over a maximum of 30 hops:
1 3 ms 3 ms 3 ms 192.168.8.1
2 1 ms 1 ms 1 ms elissaemily-pc.york.edu [192.168.10.5]
3 2 ms 2 ms 2 ms rrcs-76-79-19-33.west.biz.rr.com [76.79.19.33]
4 31 ms 3 ms 2 ms ge-1-1-0.lnclne00-mx41.neb.rr.com [76.85.220.109]
5 20 ms 17 ms 17 ms ge-7-3-0.chcgill3-rtr1.kc.rr.com [76.85.220.137]
6 20 ms 20 ms 19 ms ae-5-0.cr0.chi30.tbone.rr.com [66.109.6.112]
7 19 ms 19 ms 24 ms ae-1-0.pr0.chi10.tbone.rr.com [66.109.6.155]
8 26 ms 24 ms 24 ms 74.125.48.109
9 23 ms 24 ms 21 ms 216.239.46.246
10 39 ms 39 ms 55 ms 209.85.242.215
11 39 ms 39 ms 39 ms 209.85.254.243
12 39 ms 40 ms 96 ms 209.85.253.145
13 39 ms 39 ms 39 ms yx-in-f147.1e100.net [74.125.45.147]
Trace complete.
Note the second entry in there. Not only is the host name a student's computer, but the ip address doesn't exist. Dhcp shows that host as having a different address and you can't ping any 192.168.10.5. Yet somehow it's routing packets for us (and not very well, either — things are slow right now). The basic network routing table looks like this:
Destination Subnet Mask Gateway
---------------------------------------
Default Route -- 10.1.1.5 (our firewall)
10.0.0.0 255.0.0.0 --
192.168.8.0 255.255.252.0 --
