RE: SSHD + reverse IP Mapping

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> -----Original Message-----
> From: jdow [mailto:jdow@xxxxxxxxxxxxx]
> Sent: Wednesday, December 17, 2003 12:33 PM
> To: shrike-list@xxxxxxxxxx
> Subject: Re: SSHD + reverse IP Mapping
> 
> 
> Sometime you log in from the company 192.168.0.0 block and you notice
> the WAN link is listed as your address compare the last digits in the
> address. Sometimes they might be mapped 1:1 to each other. Regardless,
> perform a "host" on your 192 address. That will return an address. Is
> that address within the 192.168.0.0 network or is it within the WAN
> network? What do you get when you use "host" on the dotted 
> quad address
> you get back and see what happens.

Okay.. let's say on my personal desktop (win2k), I do a 

Pinging pc1.com [192.168.0.156] with 32 bytes of data
Reply from 192.168.0.156: bytes=32 time<10ms TTL=128

ping pc-wan-link.com [192.168.0.156] with 32 bytes of data
Reply from 192.168.0.156: bytes=32 time<10ms TTL=128

See.. Same IP, diff Hostname

In Linux, I do a 
[shrike@shrike log]$ host pc1.com
wdm20179.my.asia.wdc.com has address 192.168.0.156

[shrike@shrike log]$ host pc-wan-link.com
wdvirtual2000.my.asia.wdc.com has address 192.168.0.156

Both pointing to the same IP Address, yet Different Hostname

But if I do a 

[shrike@shrike log]$ host 192.168.0.156
156.0.168.192.in-addr.arpa domain name pointer pc-wan-link.com.


> Any manner of interesting things can be going on here. One possibility
> is aliased addresses. Another is an invisible proxy server.

So.. I think there's a screwup in corporate IT. DNS server has been
configured hard-coded mappings of pc hostnames to IPs they dynamically
assign.?????

Is that it??

> 
> Of course, the simple thing might be to call corporate IT and see if
> they can explain what you see.
>
I doubt they'll be bothered.


is there a way to get ssh to put in the IP add instead of the hostname? 
since 1 Ip resolves to 2 hostnames.

BTW, Thanks for the reply.


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