Should the logon time be so long even if I telnet by numeric address, say
telnet xx.yy.zz.ww ?
Regards
// luis oliveira
> At 04:27 PM 4/12/01 -0400, Luis Oliveira wrote:
>
>> Our machines have fixed IP addresses. We are experimenting a problem when
we
>> try to telnet a Unix machine. It takes forever (almost half a minute). The
>> same problem with e-mail checking ( 30 seconds to logon on the server).
>> Before we had just two subnets. Now we have more (private networks), and
the
>> mail server is on a public network (DMZ) separated from us by a firewall.
We
>> think that the problem is related with the Ciscos or the implementation of
>> the VLAN's. The company that implemented our network (which is a sister
>> company of my company) until now as not found a solution to our problem
and
>> the mail users, which is everyone is becoming very upset with all this.
>> Everything else works fine on the network works fine (copying files,
browse
>> the internet, that kind of stuff).
>>
>> Anyone have seen this kind of trouble before ? Can give some advice or
steps
>> to follow to eliminate this ?
>>
>> Sorry for the long post.
>>
>> Thanks
>>
>> // luis oliveira
>
> Hm. It sounds a lot like DNS issues. Do you have guys pointing to an
> internal DNS server? Does your mail server resolve to an internal IP? If
> you do internal DNS, I can see where you might have "inside has problems",
> "outside is dandy" problems. Can you time the telnetting to the Unix
> box? Are you sure it is not 75 seconds? (If it is, it is almost
> definitely DNS issues). Have you tried doing "ping" floods to those hosts
> just to see what % of packet loss occurs, if any? It could very well be
> other issues, but check your DNS setups to see if anything seems fishy with
> your internal DNS.
>
> -Carroll Kong
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