Today's Brain Teaser.

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I've been struggling with this one for some time, i am currently at the end of my teather so if anyone has any great ideas about why this happens let me know.
 
Basically, i have a linux server that has three interfaces;
 
    eth1          aaa.aaa.aaa.202        External Facing network
    eth0          bbb.bbb.bbb.254        Internal protected network
    eth1:0       aaa.aaa.aaa.197        External IP Address for FTPServer
 
I have a device that sits on xxx.xxx.xxx.5 that cannot get to any service on aaa.aaa.aaa.197, however every other ip address i have tried can.  I suspect that if i release the real ip address of aaa.aaa.aaa.197 then everyone reading this list could too.
 
And it's on the .5 address, if i try from xxx.xxx.xxx.15 i can connect.
 
Nothing is being show as dropped in the logs either.   
 
Thanks,
 
Jonathan Humphrey
 


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