[ILUG] Routing problem

[John Allen]

Kevin wrote:
> John Allen wrote:
>> Kevin wrote:
>>> I am having problems with my Debian/Lenny firewall/routing box. The 
>>> internet connection runs really, really slow. It does work - but its 
>>> very slow.
>>>
>>> My internal lan is 192.168.100.*
>>> My DSL router is 192.168.1.254
>>> My external nic (wireless) is 192.168.1.1
>>> My internal nic is 192.168.100.1
>>>
>>> I checked the routing table:
>>>
>>> Kernel IP routing table
>>> Destination     Gateway         Genmask         Flags Metric Ref    
>>> Use Iface
>>> 192.168.100.0   *               255.255.255.0   U     0      
>>> 0        0 eth0
>>> 192.168.1.0     *               255.255.255.0   U     0      
>>> 0        0 wlan0
>>> default         192.168.1.254   0.0.0.0         UG    0      
>>> 0        0 wlan0
>>>
>> Your default route is the wireless connection, I'd guess the wireless 
>> connection is the issue.
>>>
>>> Ifconfig/iwconfig look OK. However if I run traceroute I get some 
>>> odd results:
>>>
>>> traceroute to an internal LAN address completes in 1 hop
>>>
>>> traceroute to the DSL router 192.168.1.254 from the firewall box 
>>> fails after about 30 hops - it should be 1 hop.
>>>
>>> Running tracepath on the DSL box gives me:
>>>
>>> server:/home/kevinphilp# tracepath 192.168.1.254
>>> 1:  192.168.1.1 (192.168.1.1)                              1.218ms 
>>> pmtu 1500
>>> 1:  no reply
>>> 2:  no reply
>>>
>>> On google I get the same
>>> server:/home/kevinphilp# tracepath www.google.com
>>> 1:  192.168.1.1 (192.168.1.1)                              0.950ms 
>>> pmtu 1500
>>> 1:  no reply
>>> 2:  no reply
>>>
>>> Any thoughts welcome
>>>
>>> Kevin.
>>>
>>
> There does seem to be something wrong with it - the signal quality is 
> claims to get from the access point is about 50% - which is weak 
> considering the access point is about 15 feet away. Also it constantly 
> backs off the rate from 54M down to 1M - my guess is either the 
> wireless card or the router are decrepit - does that sound reasonable?
>
I've had a similar problem with my Laptop (Ubuntu Intrepid), was getting 
1M all the time until very recently, when some kernel update fixed it. 
Still rarely get 54Mbps, but between 24 and 36.

I'd direct wire the Deb box to the DSL modem/router (thats what I've 
done), so at least the LAN is fast.