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Re: [lvs-users] slow rsh login

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [lvs-users] slow rsh login
From: David Merhar <merhar@xxxxxxxxxxxxxxxx>
Date: Thu, 18 Dec 2008 11:34:16 -0600
Appreciate the reply.   I believed/hoped the same thing, but still no  
luck.

- I've tried adding  the calling host in to /etc/hosts
- (We'd had DNS issues with lvs/ssh, but I think that was indicated by  
cached host info allowing timely subsequent logins.)
- RSHing the RIP is problem free.

Also,
- rsh'ing root@VIP has the same problem, so I doubt it's an  
authentication/account issue.

djm




On Dec 18, 2008, at 10:56 AM, Graeme Fowler wrote:

> On Thu, 2008-12-18 at 09:40 -0600, David Merhar wrote:
>> - RHEL5.2 (but configured from here, 
>> http://www.austintek.com/LVS/LVS-HOWTO/mini-HOWTO/LVS-mini-HOWTO.html#example_lvs_dr
>>   EXCEPT echo "1" > */arp_ignore ----- not "hidden")
>> - ssh works fine.
>> - delay is always 30 seconds.
>> - rsh functions fine once logged in.
>> - successive rsh logins are all delayed.
>> - xinetd has been recompiled without libwrap
>
> This is almost certainly a DNS timeout. Put the calling host into the
> hosts table on the rsh server and see what happens, or ensure that  
> it's
> got a valid PTR.
>
> the rshd man pages say:
>
> 4. The server checks the client’s source address and requests the cor-
>   responding host name (see gethostbyaddr(3), hosts(5) and named(8)).
>   If the hostname cannot be determined, the dot-notation representa-
>   tion of the host address is used.
>
> I'd put money on the rsh server not being able to get a valid hostname
> for the calling host.
>
> Graeme
>
>
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