[Cerowrt-users] ceroWRT 3.7.5-2 won't get IP adress from Cable Modem, only form another router

[Sebastian Moeller]

Hi qkiel,



On Sep 4, 2013, at 11:32 , qkiel <qkiel.at at gmail.com> wrote:

> Hi,
> I flashed ceroWRT 3.7.5-2 on router WNDR3800.
> 
> If I connect:
> Cable Modem -> WNDR3800 -> Computer
> I can't get access to internet by wire or wi-fi.
> 
> WNDR3800 in tab:
> Status -> Overview -> Network IPv4 WAN Status shows Not connected
> Ping from tab:
> Network -> Diagnostics shows PING 8.8.8.8 (8.8.8.8): 56 data bytes ping: sendto: Network is unreachable
> 
> But if I put another router between Modem and WNDR3800 I'll get IP address. Only then everything works fine:
> Cable Modem -> Old Router -> WNDR3800 -> Computer
> and I can access internet by wire or wi-fi.
> 
> WNDR3800 in tab:
> Status -> Overview -> Network IPv4 WAN Status shows normal IP address, dhcp, net mask etc.
> Ping from tab:
> Network -> Diagnostics works fine
> 
> I've tried returning to default settings and reflashing ceroWRT, no luck.
> Probably there's some little DHCP setting that prevents me from obtaining IP address directly from Cable Modem.

	One other thing to try is to replace the cerowrt wan mac address with the mac address of the old router, that might fool the dhcp server...


> 
> Thanks for your time,
> qkiel
> 
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