Problem with name resolving

[Markus Feldmann]

Correction, my server can see himself localy, for example:
feld-server:/var/www# ping -R -c 1 feld-server
PING feld-server.feldland.lan (192.168.0.186) 56(124) bytes of data.
64 bytes from feld-server.feldland.lan (192.168.0.186): icmp_req=1 
ttl=64 time=0.090 ms
RR: 	feld-server.feldland.lan (192.168.0.186)
	feld-server.feldland.lan (192.168.0.186)
	feld-server.feldland.lan (192.168.0.186)
	feld-server.feldland.lan (192.168.0.186)


--- feld-server.feldland.lan ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.090/0.090/0.090/0.000 ms

feld-server:/var/www# ping -R -c 1 feldland.dyndns.org
PING feldland.dyndns.org (92.76.235.61) 56(124) bytes of data.
64 bytes from dslb-092-076-235-061.pools.arcor-ip.net (92.76.235.61): 
icmp_req=1 ttl=64 time=0.077 ms
RR: 	dslb-092-076-235-061.pools.arcor-ip.net (92.76.235.61)
	dslb-092-076-235-061.pools.arcor-ip.net (92.76.235.61)
	dslb-092-076-235-061.pools.arcor-ip.net (92.76.235.61)
	dslb-092-076-235-061.pools.arcor-ip.net (92.76.235.61)


--- feldland.dyndns.org ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.077/0.077/0.077/0.000 ms

But this does not work:
feld-server:/var/www# ping -R -c 1 test.feldland.dyndns.org
ping: unknown host test.feldland.dyndns.org
feld-server:/var/www# ping -R -c 1 www.feldland.dyndns.org
ping: unknown host www.feldland.dyndns.org

My server can still see the other local clients.

regards Markus