[GTALUG] IP mystery

[Darryl Moore]

Thanks for that. I see it there. WTF? Any idea why I don't see it with 
ifconfig?


On 2019-02-21 03:01 PM, Alvin Starr via talk wrote:
> 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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