Re: internal network problem

[ha shao <hashao@hashao.hypermart.net>]

On Fri, Jan 18, 2002 at 12:19:36AM +0800, Zou Min wrote:
> 
> Recently, there is a strange problem that, when I "ftp 192.168.1.1"
> (the gateway server) from 192.168.1.3 (a client computer), it takes an insanely
> long time to get the ftp login prompt. (it is a just a internal connection,
> and expected to be very fast). This problem also happens to internal telnet, 
> ssh connection to the server. 
> 
> When doing the above ftp connection, I also ran "tcpdump" to observe 
> eth0 (the external interface) at the server. It seems the server try to 
> find the hostname for 192.168.1.8 from the DNS server. But I thought there 
> should not be DNS-lookup involved.
> 

sound like a reverse dns lookup problem. Search 
'reverse dns lookup telnet' on google and you will find
your answer.

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