[GTALUG] IP mystery
Alvin Starr
alvin at netvel.net
Thu Feb 21 15:01:43 EST 2019
try running "ip addr"
There are some aliases that will not be reported back by ifconfig.
On 2/21/19 2:55 PM, Darryl Moore via talk wrote:
> Hello LUGgers.
>
> Here is an interesting mystery for anyone interesting. I'd love if
> anyone could explain it. The following is cut and paste directly from
> my bash session and not edited in anyway. What the $*#$^ is going on
> here?
>
> I have reset all the routers between these two machines in case
> somehow they were responding to ARP requests instead of the target
> machine. I've done everything except for resetting the target itself.
> Also I have a daemon on the target which is doing 'C' system calls
> with getifaddrs(&ifap) library calls and it reports back both
> 192.168.11.50 and 192.168.11.133 even though ifconfig does not.
>
> Anybody have a clue what is going on here?
>
> cheers,
> Darryl
>
> ----------------------------------
>
>
>
>
>
>
> darryl at darryl-Aspire-V3-575:~$
> darryl at darryl-Aspire-V3-575:~$
> darryl at darryl-Aspire-V3-575:~$
> darryl at darryl-Aspire-V3-575:~$ ssh root at 192.168.11.133
> Warning: Permanently added '192.168.11.133' (ECDSA) to the list of
> known hosts.
> Welcome to Ubuntu 16.04 LTS (GNU/Linux 4.4.0-64-generic i686)
>
> * Documentation: https://help.ubuntu.com/
>
> 658 packages can be updated.
> 406 updates are security updates.
>
> New release '18.04.2 LTS' available.
> Run 'do-release-upgrade' to upgrade to it.
>
>
> You have new mail.
> Last login: Thu Feb 21 14:45:01 2019 from 192.168.11.127
> root at elp123456:~# ifconfig
> eth0 Link encap:Ethernet HWaddr 00:f1:f3:8f:05:7d
> inet addr:192.168.11.50 Bcast:192.168.11.255
> Mask:255.255.254.0
> inet6 addr: fe80::2f1:f3ff:fe8f:57d/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:1269911 errors:0 dropped:1065 overruns:0 frame:0
> TX packets:682949 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:214230001 (214.2 MB) TX bytes:129622352 (129.6 MB)
>
> eth0:2 Link encap:Ethernet HWaddr 00:f1:f3:8f:05:7d
> inet addr:192.168.9.1 Bcast:192.168.9.255 Mask:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
>
> 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:2264301 errors:0 dropped:0 overruns:0 frame:0
> TX packets:2264301 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1
> RX bytes:1188627720 (1.1 GB) TX bytes:1188627720 (1.1 GB)
>
> tun0 Link encap:UNSPEC HWaddr
> 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
> inet addr:10.8.1.245 P-t-P:10.8.1.245 Mask:255.255.0.0
> UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
> RX packets:214252 errors:0 dropped:0 overruns:0 frame:0
> TX packets:214990 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:100
> RX bytes:12935258 (12.9 MB) TX bytes:69517662 (69.5 MB)
>
> root at elp123456:~#
> ---
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--
Alvin Starr || land: (905)513-7688
Netvel Inc. || Cell: (416)806-0133
alvin at netvel.net ||
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