Networking Problem
Hi, I'm having a very strange networking problem that has my linux
buddies and I stumped.
I'll draw a basic mud map because it makes it ALOT easier to understand
my situation as I have two gateways due to shared housing.
[Bridged ADSL Modem]
|
[Firewall]
(220.244.217.*, 10.0.1.1, 10.0.0.1)
| |
[DMZ] [Workstations] and [my Debian Box]
(10.0.1.*) (10.0.0.*) (10.0.0.2, 10.1.1.1)
|
[my workstation]
(10.1.1.22)
Last week my Debian Box had a hard shutdown due to a knocked out
powercable :( and when I rebooted it could no access the internet, other
workstations, firewall or DMZ. And neither could my Workstation. The
weird thing is, that all the above mentioned machines, can still contact
my Debian Box. eg: The Firewall can ping my Debian Box, but my Debian
Box can't ping the firewall. My Debian Box is hosting some friends
websites and hosts some email accounts, which all still work. From my
workstation I can ping my Debian Box and It can ping me, but in order
for me to get on the net with my workstation, ive had to plug in with
the rest of the workstations (ie: not go through my Debian Box)
I have flushed all iptables rules and set policies to ACCEPT so it is
not a firewall problem. I have tried 4 other NIC's and even put the hard
drive in another box so it is not a hardware problem. I have also tried
switching the IP's of eth0 and eth1 around and even set eth0 to use DHCP
(provided by the Firewall)
I cant see anything wrong with my routing table either:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.0.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
10.0.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
0.0.0.0 10.0.0.1 0.0.0.0 UG 0 0 0 eth0
It's obviously not extra urgent because people can still access their
websites and emails from the outside, It's just a pain. I can't even do
an 'apt-get upgrade' in the hope of overwritting whatever it stuffing
this up.
Hope i've provided enough information and thanks for any help.
- jrb
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