DNS - reverse lookup & timeout

DNS - reverse lookup & timeout

Post by Bent Larse » Thu, 23 May 1996 04:00:00

We have a ISDN connection to a internet provider and uses our own name server with our providers nameserver put in our named.boot as

This work quite well, but due to the time it takes to dial - you will often recieve at "This host does not have a DNS entry" error. When you
uses nslookup interactively, you have an option to set the timeout value (default 4) to something higher.

Where can I set the default timeout for namelookup ?

Secondly my reverse lookup does not work on anything outside my own net.
When i use nslookup aaa.bbb.ccc.ddd server <my.internet.provider> I don't have any problems.

The most annoying part of this is, that you will only see ip'addresses and no name translations when you use traceroute etc...
I suspect a local configuration error, but have been unable to locate it.

Any good suggestions ?

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1. how to change reversed DNS lookup timeout setting

When I use telnet to log on to a Sun Solaris 7 machine, it takes long time
(several minutes) for me to get the login prompt. I know the problem is with
the reversed DNS lookup. There is no DNS server running in our network.
Adding the machine into the host table can solve the problem but we need to
telnet to this box when we are at home. The machines at home get IP address
dynamically (DHCP). So what I can think is to decrease DNS lookup timeout
setting. Is that possible? Thanks.

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