Problem s pripojenim internetu

[mobratil na centrum.cz]

Dobry den,
Mam doma nainstalovany Mandrake Linux 8.1. Mam ho uz nekolik mesicu, ale 
najednou z niceho nic po restartu prestal poradne fungovat internet. Kdyz do prohlizece napisu
adresu, nic se nestane. Ping funguje jenom kdyz napisu ip adresu nejakeho serveru na internetu.
Nemuze najit vubec DNS, ale v resolv.conf mam ty DNS servery normalne nastavene.
Po pripojeni resolv.conf vypada takhle (pripojeni na Tiscali):
 
domain localdomain 		#kppp temp entry
# ppp temp entry


nameserver 195.146.99.20 # ppp temp entry
nameserver 195.146.100.5 # ppp temp entry

Nslookup se taky chova divne:

[martin na k6 martin]$ nslookup www.linux.cz
Note:  nslookup is deprecated and may be removed from future releases.
Consider using the `dig' or `host' programs instead.  Run nslookup with
the `-sil[ent]' option to prevent this message from appearing.
;; connection timed out; no servers could be reached

Tu samou odpoved mi to vypise i kdyz jsem offline.

Predem dekuji za radu

S pozdarvem
Martin Obratil