[mdlug] Static IP behind NAT with Xfinity

[R Kannan]

Thanks for the help.

I believe I had set the static IP because I am using my desktop as a 
MythTV master backend and I did not want the IP to jump around a few 
years back.

Now for the life of me I cannot figure out where I had set the static IP 
to be 192.168.1.90 (which is in the range of my old router). My new 
router seems to be using 10.0.0.2 through 10.1.1.255. So I believe I 
have to keep the static IP in this range

ifconfig says...

eth0      Link encap:Ethernet  HWaddr 38:60:77:c7:57:34
           inet addr:192.168.1.90  Bcast:192.168.1.255 Mask:255.255.255.0
           inet6 addr: fe80::3a60:77ff:fec7:5734/64 Scope:Link
           inet6 addr: 2600:1702:28b0:d290:3a60:77ff:fec7:5734/64 
Scope:Global
           inet6 addr: 2600:1702:28b0:d290::447/128 Scope:Global
           inet6 addr: 2600:1702:28b0:d290:d45e:1460:3561:f3df/64 
Scope:Global
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:458563 errors:0 dropped:54217 overruns:0 frame:0
           TX packets:247011 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:471035045 (471.0 MB)  TX bytes:50199927 (50.1 MB)

lo        Link encap:Local Loopback
           inet addr:127.0.0.1  Mask:255.0.0.0
           inet6 addr: ::1/128 Scope:Host
           UP LOOPBACK RUNNING  MTU:65536  Metric:1
           RX packets:163310 errors:0 dropped:0 overruns:0 frame:0
           TX packets:163310 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:11274718 (11.2 MB)  TX bytes:11274718 (11.2 MB)

These are the contents of the file /etc/network/interfaces (no mention 
of eth0). Not sure where the static address is set.

eth0      Link encap:Ethernet  HWaddr 38:60:77:c7:57:34
           inet addr:192.168.1.90  Bcast:192.168.1.255 Mask:255.255.255.0
           inet6 addr: fe80::3a60:77ff:fec7:5734/64 Scope:Link
           inet6 addr: 2600:1702:28b0:d290:3a60:77ff:fec7:5734/64 
Scope:Global
           inet6 addr: 2600:1702:28b0:d290::447/128 Scope:Global
           inet6 addr: 2600:1702:28b0:d290:d45e:1460:3561:f3df/64 
Scope:Global
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:458563 errors:0 dropped:54217 overruns:0 frame:0
           TX packets:247011 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:471035045 (471.0 MB)  TX bytes:50199927 (50.1 MB)

lo        Link encap:Local Loopback
           inet addr:127.0.0.1  Mask:255.0.0.0
           inet6 addr: ::1/128 Scope:Host
           UP LOOPBACK RUNNING  MTU:65536  Metric:1
           RX packets:163310 errors:0 dropped:0 overruns:0 frame:0
           TX packets:163310 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:11274718 (11.2 MB)  TX bytes:11274718 (11.2 MB)



On 8/4/20 8:29 PM, Carl T. Miller wrote:
> Did you know you could assign more than one IP address
> to an interface?  If you can set the Ubuntu desktop to use
> DHCP, it will get you on your local lan and the internet.
> Then you can just add a static IP address.
>
> If this sounds good, start by getting the desktop to use
> DHCP and ensure that it's able to connect to your lan
> and the internet.  We can figure out how to add the
> static one afterwards.
>
> c
>
>
> On 8/4/20 7:49 PM, R Kannan wrote:
>> Hello,
>>
>> I just subscribed to comcast (did not have many choices 
>> unfortunately) and got their modem/router (Voice and Data Modem
>> ARRIS Group, Inc. TG1682G). Their dumbed down setup web application 
>> seemed to work. The wireless is fine and the wired works with devices 
>> using DHCP.
>>
>> But I have a desktop running ubuntu 16.04 using a static IP (for 
>> various reasons) and when I connected it to the comcast router it did 
>> not seem to have any connection. Is there something special I need to 
>> do for devices not requiring IP or the subnet incorrect. I cannot 
>> find what subnet addresses are being doled out by the router as there 
>> is no simple web interface like in other modems.
>>
>> I thought I will ask here before I go up the chain of Comcast 
>> unhelpful masses.
>>
>> Any help is appreciated.
>>
>> Thanks
>>
>> _______________________________________________
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>
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