Re: [gentoo-user] Frontier ADSL modem and IP address

[Jack]

On 2019.12.30 17:43, Dale wrote:
> Jack wrote:
> > On 2019.12.30 15:04, Dale wrote:
> >> Howdy,
> >>
> >> I ran up on a used DSL modem that supports IPv6.  It was cheap so
> >> figured why not.  Ironically, it is also a router.  It's a Netgear
> >> Frontier B90-755044-15 sometimes referred to as the 7550.  
> Anyway, I
> >> tried all the usual IPs to access the thing, no luck.  I tried
> resetting
> >> it, holding the reset button for 7 seconds.  That didn't help
> either. 
> >> I've googled and tried all the IPs I can find that way too.  None
> of
> >> this is working.  The lights and all come up like it should.  It
> seems
> >> to be working fine, just can't access it to set it up. 
> >>
> >> Is there a way to find the IP for this thing?  I'm out of ideas
> here. 
> >> Anyone own one of these and can share their defaults?  Why don't
> they
> >> put the default IP on the bottom anyway??? 
> >>
> >> Thanks.
> >>
> >> Dale
> > I think I probably had one of those years ago, before switching to
> > cable.  If your PC uses DHCP, then you should be able to do "ip a"
> and
> > find the subnet (perhaps 192.168.1)  You might then try 254 as the
> > last octet.  Using traceroute might also show you the address.  If
> you
> > want/need to dig out the big guns, wireshark should also provide
> some
> > useful info.
> >
> > Jack
> >
>
> I've never noticed the ip command before, not that I remember
> anyway.  I
> did try ipconfig before tho.  While I tried to use ip, I may not be
> using it correctly.  Actually, most likely I'm not.  The help page was
> little help either. 
At some point ifconfig disappeared for me, and I finally found ip as  
the closest for getting the same data.  (I now do have ifconfig back.)   
I think those differences depend on specific versions of various  
network utilities.
>
> This is the IPs I've tried so far:
>
> http://192.168.0.1/
> http://192.168.0.5
> http://192.168.0.254/
> http://192.168.0.255/
> http://192.168.1.1/
> http://192.168.1.5
> http://192.168.1.254
> http://192.168.1.255
> http://192.168.2.1
> http://192.168.2.5
> http://192.168.2.254
> http://192.168.2.255
> http://192.168.254.254/
That last one matches something I just found on the Frontier site for  
that router.  Have you tried a hard reset to factory settings on the  
router?  Is there anything useful actually printed on the bottom of the  
router?  You might need a bright light and a magnifying glass :-)
>
> I think I tried 128 on the end at one point as well.
>
> Even tho I have dhcp set up and the ethernet light shows it is
> connected, I still restart eth1 just to be sure.  Then I run ifconfig
> and take the info from there to start trying addresses.  I figure the
> 3rd part might narrow it down a bit.   Then I try some others even if
> they don't make a lot of sense to try.  This is what ipconfig usually
> shows for eth1:
>
>
>
> root@fireball / # ifconfig
> eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>         inet 192.168.2.5  netmask 255.255.255.0  broadcast
> 192.168.0.255
Something smells fishy here.  Why are inet and broadcast not on the  
same network?  They should differ only in the last octet, given the  
netmask.  I'm also very surprised the router is at .5 and not either .1  
or .254.
>         inet6 fe80::201:53ff:fe80:dc35  prefixlen 64  scopeid
> 0x20<link>
>         ether 00:01:53:80:dc:35  txqueuelen 1000  (Ethernet)
>         RX packets 43311747  bytes 60136286625 (56.0 GiB)
>         RX errors 0  dropped 0  overruns 0  frame 0
>         TX packets 33539185  bytes 2574220465 (2.3 GiB)
>         TX errors 2  dropped 0 overruns 0  carrier 0  collisions 0
>
> To be honest, it doesn't seem to change from when I'm hooked to the
> older hardware. I dunno.
>
> Open to ideas if anyone has some. 
Can you get to the internet?  If so, then a traceroute might show where  
the packets think they are going.  If not, then you may not have a  
proper connection between the router and PC.  Those mismatched network  
numbers could be the issue.  (I don't know if you are sending these  
messages using that connection, or sending from another device.)
>
> Dale
Jack