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Re: Strange Network Problem

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On 08/31/2018 10:41 PM, David Christensen wrote:
> On 08/31/2018 12:50 PM, Stephen P. Molnar wrote:
>> I am running Debian Stretch on my Linux platform.
>>
>> I have noticed low internet traffic when I have not been doing 
>> anything outside of my LAN.  This has made me a tad suspicious.
>>
>> Now:
>>
>> root@AbNormal:/home/comp# ifconfig
>> enp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>>          inet 162.237.98.238  netmask 255.255.252.0  broadcast 
>> 162.237.99.255
>>          ether bc:ee:7b:5e:83:36  txqueuelen 1000  (Ethernet)
>>          RX packets 796401  bytes 529829454 (505.2 MiB)
>>          RX errors 0  dropped 0  overruns 0  frame 0
>>          TX packets 236054  bytes 22520861 (21.4 MiB)
>>          TX errors 0  dropped 0 overruns 0  carrier 0 collisions 0
>>
>> lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
>>          inet 127.0.0.1  netmask 255.0.0.0
>>          loop  txqueuelen 1  (Local Loopback)
>>          RX packets 399  bytes 42360 (41.3 KiB)
>>          RX errors 0  dropped 0  overruns 0  frame 0
>>          TX packets 399  bytes 42360 (41.3 KiB)
>>          TX errors 0  dropped 0 overruns 0  carrier 0 collisions 0
>>
>>
>> It turns out that this ISP, 162.237.98.238 is my ISP, AT&T here in 
>> Columbus, Ohio.
>>
>> The other four nodes on my LAn all have IP's starting with 192.168.1 
>> - which is what it's supposed to be.
>>
>> Just what is going on here? I don't have a clue.
>>
>> I dop have firewalls implemented on both the modem and the computers.
>>
>> Any insights will be much appreciated.
>>
>> Thanks in advance.
>>
>
> Running nslookup(1):
>
>     2018-08-31 18:53:21 dpchrist@vstretch ~
>     $ nslookup 162.237.98.238
>     Server:        192.168.5.1
>     Address:    192.168.5.1#53
>
>     Non-authoritative answer:
>     238.98.237.162.in-addr.arpa    name = 
> 162-237-98-238.lightspeed.clmboh.sbcglobal.net.
>
>     Authoritative answers can be found from:
>
>
> Running host(1):
>
>     2018-08-31 18:58:15 dpchrist@vstretch ~
>     $ host 162.237.98.238
>     238.98.237.162.in-addr.arpa domain name pointer 
> 162-237-98-238.lightspeed.clmboh.sbcglobal.net.
>
>
> 162.237.98.238 appears to be a valid IPv4 public Internet address.
>
>
> You should have a device provided by your Internet service provider 
> (ISP) between their wiring (e.g. telephone service) and your wiring 
> (e.g. Ethernet local area network/LAN).  What is the make and model of 
> the ISP device?  Please provide a URL to the product support page.
>
>
> What are the "other four nodes"?
>
>
> How is everything interconnected?
>
>
> David
>
>
Thanks for your reply.

ISO device is an Arris BGE210-700 Broadband Gateway Release 1.0 from 
AT&T (http://www.arris.com/Search/?q=Arris+BGE210-700+Broadband+Gateway)

Wired Connections:  2 Desktops,  printer and VOIP telephone

Wireless Connections:  Laptop and two Android Smartphones

root@AbNormal:/home/comp# nslookup
 > nslookup -a
Server:        192.168.1.254
Address:    192.168.1.254#53

Non-authoritative answer:
Name:    nslookup
Address: 198.105.244.130
Name:    nslookup
Address: 104.239.207.44
 >
 > host
Server:        192.168.1.254
Address:    192.168.1.254#53

Non-authoritative answer:
*** Can't find host: No answer
 >

-- 
Stephen P. Molnar, Ph.D.
Consultant
www.molecular-modeling.net
(614)312-7528 (c)
Skype: smolnar1

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Thread

Strange Network Problem "Stephen P. Molnar" <s.molnar@sbcglobal.net> - 2018-08-31 22:00 +0200
  Re: Strange Network Problem Dan Purgert <dan@djph.net> - 2018-08-31 23:40 +0200
  Re: Strange Network Problem David Christensen <dpchrist@holgerdanske.com> - 2018-09-01 04:50 +0200
    Re: Strange Network Problem "Stephen P. Molnar" <s.molnar@sbcglobal.net> - 2018-09-01 13:10 +0200
      Re: Strange Network Problem rhkramer@gmail.com - 2018-09-01 14:30 +0200
        Re: Strange Network Problem "Stephen P. Molnar" <s.molnar@sbcglobal.net> - 2018-09-01 18:10 +0200
          Re: Strange Network Problem rhkramer@gmail.com - 2018-09-01 20:00 +0200
      Re: Strange Network Problem David Christensen <dpchrist@holgerdanske.com> - 2018-09-02 07:40 +0200
        Re: Strange Network Problem "Stephen P. Molnar" <s.molnar@sbcglobal.net> - 2018-09-02 14:20 +0200
          Re: Strange Network Problem mick crane <mick.crane@gmail.com> - 2018-09-02 14:50 +0200
            Re: Strange Network Problem David Christensen <dpchrist@holgerdanske.com> - 2018-09-02 20:40 +0200
              Re: Strange Network Problem mick crane <mick.crane@gmail.com> - 2018-09-03 00:30 +0200
                Re: Strange Network Problem David Christensen <dpchrist@holgerdanske.com> - 2018-09-03 05:20 +0200
  Re: Strange Network Problem mick crane <mick.crane@gmail.com> - 2018-09-01 10:10 +0200

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