ping problems with BIND9
mike at wackyworld.tv
Wed Dec 1 20:14:07 UTC 2004
I did both before joining the list. Ping doesn't work for short or
fully qualified and the domain and search entries are both in
resolv.conf. The server is set to listen on all interfaces right now
for testing. Other than the related bind files, /etc/hosts and resolv
are the same (with the exception of the hostname in hosts) on both
client and server. www/external stuff works fine from the client with
no problem. I'm assuming that's due to the root.hint servers. External
caching seems to be o.k. too from dig response times. Dig on the client
returns the properly associated IP in the answer section and the reverse
lookup (-x) returns the fully qual. domain name. No other internal
services work....eg ssh,ping,http.
On Wed, 2004-12-01 at 14:50, Kerry Thompson wrote:
> That delay sounds like its searching for the domain, in other words the
> client system doesn't know what domain its in.
> Try pinging the fully qualified domain name eg.
> machinename.your_domain.tld, and/or adding a 'domain' statement into
> domain your_domain.tld
> Mike Branda said:
> > Kerry,
> > here's what's in nsswitch.conf. it already had dns in the hosts and
> > networks lines. What's strange is that if I remove the nameserver from
> > resolv.conf, when I do "ping machinename" it immediately returns "ping:
> > unknown host machinename". But when the nameserver is there, it takes
> > about 15 seconds to return the same message.
> > Mike
> > On Wed, 2004-12-01 at 13:56, Kerry Thompson wrote:
> >> Mike
> >> Some information on what the client OS is would help.
> >> (taking a punt that they are *nix) It sounds like the clients have
> >> /etc/resolv.conf configured, but /etc/nsswitch.conf hasn't got "dns"
> >> configured for hosts lookups. A key difference between dig/host and
> >> vanilla commands ( ping, telnet ) are that dig goes straight to
> >> resolv.conf to find DNS servers, whereas ping uses normal libraries to
> >> read nsswitch.conf then oges to resolv.conf
> >> Kerry
> >> Mike Branda said:
> >> > O.K. here goes. after muddling around for a bit now I am out of ideas
> >> > as to why this isn't working. I have set up an internal only domain
> >> > "my.fakedomain.local" and am having a minor issue. I can use dig from
> >> > the dns server to any machine listed in the zone and get the proper
> >> > answer and can do the same from any client machine as well as reverse
> >> > lookups. The caching from external web servers works also. What I am
> >> > having an issue with is that I can ping by IP and hostname for the
> >> local
> >> > network machines from the dns box itself but pings only work by IP
> >> from
> >> > the clients. Again, dig works on both dns and clients for local
> >> machine
> >> > name lookups. Any ideas why I can't ping hostnames from clients??
> >> >
> >> > Thanks.
> >> >
> >> > Mike
More information about the bind-users