Can't ping when dns is running

[Kristina Stoeva]

My problem is that I cannot ping on IP addresses when 'named' is running =
not on domain names! If 'named' is not running I can ping on IP address to =
any machine available in the Internet. I can ping to any domain name =
address if I point the box to a working Name Server.=20
I don't have /etc/route.conf file. My routing tables are perfect.

Destination     Gateway         Genmask         Flags Metric Ref    Use =
Iface
xx.xx.xx.xx    0.0.0.0         255.255.255.255  UH    0      0        0 =
eth0
xx.xx.xx.0    0.0.0.0         255.255.255.224  U     0      0        0 =
eth0
127.0.0.0       0.0.0.0         255.0.0.0        U     0      0        0 =
lo
0.0.0.0         xx.xx.xx.xx   0.0.0.0          UG    0      0        0 =
eth0

Only if I start 'named' with no zone files the machine would have problem =
finding it's default route, it finds it eventually. If I run 'named' with =
zone file, I can ping on IP all the machines in the zone. BUT when I =
decide to ping outside it's not finding the route even though the routing =
table is perfect. Actually some of the pings return, I get about 90% =
placket loss.
What is a mystery for me is WHY the running of 'named' affects the ability =
of pinging on IP?? They are on entirely different layers!=20

On 8/16/2000, AL9000 <al9000 at programmer.net> wrote:
>
>Kristina Stoeva wrote:
>>=20
>> Hi,
>> I did a fresh Redhat 6.2 'server' install today with bind-8.2.2_P5-9=20
>. '
>> named' is not running, it doesn't start by default. I can ping=20
>on IP=20
>> address wherever I want.
>
>At that time you were using /etc/hosts and /etc/route.conf. Could=20
>you
>resolve any external names or only ping by address?
>
>> Then I start '/etc/rc.d/init.d/named start' without any configuration
>> files set up. The machine cannot find it's default route! I can't=20
>ping on
>> IP anywhere. It finds the default route eventually after minutes=20
>of
>> looking up.
>
>The default config file was a sample (at least in 6.1) and not for=20
>use
>without editing. It's quite convoluted.
>
>> Then I set up the configuration files for one domain, let's say=20
>cesoft.com.
>
>Using a config tool like linuxconf? Did route.conf get changed?
>
>>  Now I can ping on IP to any machine in cesoft.com. I still can't=20
>ping
>> anywhere in the Internet, on IP of course.
>
>I'm not sure if you can still ping using ip numbers. If not, check=20
>your
>routing tables - use '/sbin/route -n' to make sure the config scripts
>didn't cut you off. If your machine is a gateway the output should=20
>look
>something like this (the xx addresses are external, interfaces could=20
>be
>different).
>
>Kernel IP routing table
>Destination     Gateway         Genmask         Flags Metric Ref=20
>   Use
>Iface
>xx.xx.xx.xx     0.0.0.0         255.255.255.255 UH    0      0  =20
>     0
>eth1
>192.168.0.0     0.0.0.0         255.255.0.0     U     0      0  =20
>     0
>eth0
>127.0.0.0       0.0.0.0         255.0.0.0       U     0      0  =20
>     0
>lo
>0.0.0.0         xx.xx.xx.xx     0.0.0.0         UG    0      0  =20
>     0
>eth1
>
>> I really hope someone comes up with a hint.
>> Kristina
>
>Hope this helps,
>AL
>
>
>
>