Eu tenho um endereço IP estático na minha rede.
Posso executar ping em um dos servidores do Google:
root@napajohn:~# ping 74.125.224.72
PING 74.125.224.72 (74.125.224.72) 56(84) bytes of data.
64 bytes from 74.125.224.72: icmp_req=2 ttl=49 time=76.5 ms
64 bytes from 74.125.224.72: icmp_req=3 ttl=49 time=75.6 ms
64 bytes from 74.125.224.72: icmp_req=4 ttl=49 time=76.6 ms
64 bytes from 74.125.224.72: icmp_req=5 ttl=49 time=76.6 ms
Mas não consigo resolver nenhum nome de host:
root@napajohn:~# ping www.google.com
ping: unknown host www.google.com
Devo observar que estou atrás de um proxy, mas isso não deve afetar a resolução de nomes. Também não consigo resolver o nome do meu procurador.
Este é o conteúdo do meu arquivo / etc / hosts:
root@napajohn:~# cat /etc/hosts
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
127.0.0.1 napadev
Este é o conteúdo do meu arquivo / etc / networks:
root@napajohn:~# cat /etc/networks
default 0.0.0.0
loopback 127.0.0.0
link-local 169.254.0.0
Este é o conteúdo do meu arquivo / etc / network / interfaces:
root@napajohn:~# cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
#default bootstrap static address
auto eth0
#iface eth0 inet dhcp
iface eth0 inet static
address 129.83.161.162
netmask 255.255.255.0
gateway 129.83.161.254
Este é o conteúdo do meu arquivo /etc/netswitch.conf:
root@napajohn:~# cat /etc/nsswitch.conf
# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc-reference' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.
passwd: compat
group: compat
shadow: compat
hosts: files dns
networks: files
protocols: db files
services: db files
ethers: db files
rpc: db files
netgroup: nis
Alguma saída de vários comandos:
1:
root@napajohn:~# getent hosts
127.0.0.1 localhost
127.0.0.1 localhost ip6-localhost ip6-loopback
127.0.0.1 napadev
Dois:
root@napajohn:~# find / -name resolv*
/usr/lib/gcc/4.4.7/gcc-4.4.7/gcc/fortran/resolve.c
/usr/share/vim/vim72/syntax/resolv.vim
Três:
root@napajohn:~# find / -name named.*
/usr/lib/gcc/4.4.7/gcc-4.4.7/gcc/testsuite/g++.dg/cpp0x/named.C
/usr/share/vim/vim72/syntax/named.vim
Quatro:
root@napajohn:~# grep -riI dns /etc
/etc/insserv.conf:$named +named +dnsmasq +lwresd +bind9 $network
/etc/lynx-cur/lynx.cfg:# until a valid Internet host is created, based on a successful DNS
/etc/lynx-cur/lynx.cfg:# no-proxy zones in the DNS domain name space. If a tail substring of the
/etc/services:mdns 5353/tcp # Multicast DNS
/etc/services:mdns 5353/udp # Multicast DNS
/etc/udhcpd.conf:# as the dns option, they can be listed on the same line, or multiple
/etc/udhcpd.conf:opt dns 192.168.10.2 192.168.10.10
/etc/udhcpd.conf:option dns 129.219.13.81 # appened to above DNS servers for a total of 3
/etc/udhcpd.conf:#opt dns
/etc/profile.d/napa_config.sh:#export NAPA_DNS='192.168.42.1'
/etc/ssl/certs/Verisign_Time_Stamping_Authority_CA.pem:/OB4naCTuQk9I1F/RMIUdNsKvsvJMDRAmD7Q1yUQgZS9B0+c1lQn3y6ov8uQjI11
/etc/ssl/certs/95750816.0:/OB4naCTuQk9I1F/RMIUdNsKvsvJMDRAmD7Q1yUQgZS9B0+c1lQn3y6ov8uQjI11
/etc/ssl/certs/a3896b44.0:9f/uKuDp6bpbZCKamm8sOiZpUQWZJtzVHGpxxpp9Hp3dfGzGjGdnSj74cbAZJ6kJ
/etc/ssl/certs/DigiCert_Assured_ID_Root_CA.pem:VYcgoc/lbQrISXwxmDNsIumH0DJaoroTghHtORedmTpyoeb6pNnVFzF1roV9Iq4/
/etc/ssl/certs/69105f4f.0:VYcgoc/lbQrISXwxmDNsIumH0DJaoroTghHtORedmTpyoeb6pNnVFzF1roV9Iq4/
/etc/ssl/certs/ca-certificates.crt:VYcgoc/lbQrISXwxmDNsIumH0DJaoroTghHtORedmTpyoeb6pNnVFzF1roV9Iq4/
/etc/ssl/certs/ca-certificates.crt:9f/uKuDp6bpbZCKamm8sOiZpUQWZJtzVHGpxxpp9Hp3dfGzGjGdnSj74cbAZJ6kJ
/etc/ssl/certs/ca-certificates.crt:/OB4naCTuQk9I1F/RMIUdNsKvsvJMDRAmD7Q1yUQgZS9B0+c1lQn3y6ov8uQjI11
/etc/ssl/certs/Security_Communication_Root_CA.pem:9f/uKuDp6bpbZCKamm8sOiZpUQWZJtzVHGpxxpp9Hp3dfGzGjGdnSj74cbAZJ6kJ
/etc/ssl/certs/6f5d9899.0:VYcgoc/lbQrISXwxmDNsIumH0DJaoroTghHtORedmTpyoeb6pNnVFzF1roV9Iq4/
/etc/ssl/certs/6f5d9899.0:9f/uKuDp6bpbZCKamm8sOiZpUQWZJtzVHGpxxpp9Hp3dfGzGjGdnSj74cbAZJ6kJ
/etc/ssl/certs/6f5d9899.0:/OB4naCTuQk9I1F/RMIUdNsKvsvJMDRAmD7Q1yUQgZS9B0+c1lQn3y6ov8uQjI11
/etc/ssh/ssh_config:# GSSAPITrustDNS no
/etc/nsswitch.conf:hosts: files dns
Cinco:
root@napajohn:~# grep -riI name-server /etc
root@napajohn:~# grep -riI nameserver /etc
/etc/services:nameserver 42/tcp name # IEN 116
Seis:
root@napajohn:~# ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:15:c9:28:e3:96
inet addr:129.83.161.162 Bcast:129.83.161.255 Mask:255.255.255.0
inet6 addr: fe80::215:c9ff:fe28:e396/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:16863 errors:0 dropped:0 overruns:0 frame:0
TX packets:128 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1586688 (1.5 MiB) TX bytes:13557 (13.2 KiB)
Interrupt:80
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:900 errors:0 dropped:0 overruns:0 frame:0
TX packets:900 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:72008 (70.3 KiB) TX bytes:72008 (70.3 KiB)
Passei algumas horas tentando descobrir as possíveis causas desse problema, mas pelo que li e tentei até agora, tudo parece normal (como o que as pessoas sugeriram em outros threads já está bom / existe na minha máquina), exceto que eu não tenho um arquivo /etc/named.conf nem um arquivo /etc/resolv.conf. Eu poderia criá-los (como eu saberia o que colocar?), Mas acho que isso não resolveria o problema. Sugestões?
Eu estou correndo:
root@napajohn:~# cat /etc/debian_version
6.0.3
root@napajohn:~# uname -a
Linux napajohn 2.6.34 #4 Mon Oct 31 16:41:13 EDT 2011 armv7l GNU/Linux
Edite 1, após o comentário de strkol:
root@napajohn:~# echo "nameserver 8.8.8.8" > /etc/resolv.conf
root@napajohn:~# ping www.google.com
ping: unknown host www.google.com
Ainda sem dados, mas de ping agora tenta um pouco longo antes de desistir, ao contrário imediatamente saída "não poderia resolver host"