[ILUG] even wierder
John P. Looney (Kate)
jplooney-ilug at online.ie
Wed Jun 21 16:08:38 IST 2000
On Wed, Jun 21, 2000 at 03:28:56PM +0100, Niall O Broin mentioned:
> On Wed, Jun 21, 2000 at 12:05:49PM +0100, John P. Looney (Kate) wrote:
> > Turned out that it was because for some stupid reason, ping tries to do a
> > DNS lookup on the IP it's trying to ping.
> Are you saying that if you try to ping IP address a.b.c.d (rather than
> hostname x.y.z) ping tries to do a reverse DNS lookup of a.b.c.d ? If so,
> that's bizarre, and it certainly isn't happening on this box here i.e. I
> just pinged 192.168.1.103 which can't be resolved (because I took it out of
> my hosts file) and it pinged happily. Just how much did you say you screwed
> with the networking ?
Not that much. I installed a fresh machine to see what was the story -
and the same thing happened.
Just adding the host to the hosts file made it work. The DNS server in
/etc/resolv.conf was way over the network that it couldn't get to - it
wasn't just that the machine it was pinging wasn't DNSable.
The words of the unwary are apt to cause needless pain and bloody violence.
- Zen Master Greg
More information about the ILUG