A couple of annoying F8t3 things

[John Summerfield]

Rodd Clarkson wrote:
> On Thu, 2007-10-25 at 17:10 +0800, John Summerfield wrote:
>> Rodd Clarkson wrote:
>>
>>>> A pause at send time suggests a DNS lookup's timing out. Could be your 
>>>> end, could be the server's.
>>>>
>>>> What's in your /etc/resolve.conf ?
>>> # generated by NetworkManager, do not edit!
>>>
>>>
>>>
>>> nameserver 192.168.1.254
>> Do your IP addresses reverse-resolve?
> 
> not sure what this output means, but:
> 
> [rodd at localhost ~]$ host 192.168.1.254
> 254.1.168.192.in-addr.arpa domain name pointer home.gateway.
> [rodd at localhost ~]$ host home.gateway
> home.gateway has address 192.168.1.254
> ;; Warning: short (< header size) message received
> ;; connection timed out; no servers could be reached
> ;; Warning: short (< header size) message received
> ;; connection timed out; no servers could be reached

"time home.gateway"
Should be quick, like this, whether it works or fails.
17:37 [summer at numbat ~]$ time host cdm
cdm.demo.lan has address 192.168.4.254

real    0m0.012s
user    0m0.004s
sys     0m0.005s
17:37 [summer at numbat ~]$ time host 192.168.4.254
Host 254.4.168.192.in-addr.arpa not found: 3(NXDOMAIN)

real    0m0.298s
user    0m0.002s
sys     0m0.009s
17:37 [summer at numbat ~]$


Those timeouts look to me to be your problem. You can try running 
tcpdump on the server. Read the docs, but it's something like this:


tcpdump -i any -ttt port 53  and host 192.168.1.100

This shows how to combine criteria; you might want to leave the host off 
to see where the requests that time out are going.



> [rodd at localhost ~]$ 
> 
> 
>>>
>>> /etc/resolv.conf (END) 
>>>
>>>
>>>
>>>> Do you control the mail server?
>>> Yes?
>> Can your mail server resolve the IP addresses of your clients?
> 
> Nope.

That's probably part of the problem. Can you fix that?


> 
> 
> R.



-- 

Cheers
John

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