Eu tenho um servidor rodando Debian 8 Jessie que constantemente perde seu acesso à internet aparentemente sem razão. O servidor tem duas conexões com fio, o acesso à internet está na eth0 e a rede interna está na eth1. A conexão interna está funcionando normalmente.
O conteúdo de / etc / network / interfaces é:
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
allow-hotplug eth0
iface eth0 inet static
address 132.248.25.125
netmask 255.255.255.0
network 132.248.25.0
broadcast 132.248.25.255
gateway 132.248.25.254
dns-nameservers 132.248.204.1 132.248.10.2
allow-hotplug eth1
iface eth1 inet static
address 192.169.1.249
netmask 255.255.255.0
network 192.169.1.0
broadcast 192.169.1.255
gateway 192.169.1.10
ifconfig:
eth0 Link encap:Ethernet HWaddr 00:30:48:fe:a7:3c
inet addr:132.248.25.125 Bcast:132.248.25.255 Mask:255.255.255.0
inet6 addr: fe80::230:48ff:fefe:a73c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4278205 errors:0 dropped:8744 overruns:0 frame:0
TX packets:7134 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:371528685 (354.3 MiB) TX bytes:832677 (813.1 KiB)
Memory:f0000000-f001ffff
eth1 Link encap:Ethernet HWaddr 00:30:48:fe:a7:3d
inet addr:192.169.1.249 Bcast:192.169.1.255 Mask:255.255.255.0
inet6 addr: fe80::230:48ff:fefe:a73d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1206214 errors:0 dropped:2667 overruns:0 frame:0
TX packets:3028234 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:75759114 (72.2 MiB) TX bytes:4139225848 (3.8 GiB)
Memory:f0060000-f007ffff
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:65536 Metric:1
RX packets:4644 errors:0 dropped:0 overruns:0 frame:0
TX packets:4644 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1006417 (982.8 KiB) TX bytes:1006417 (982.8 KiB)
E para rota -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.169.1.10 0.0.0.0 UG 0 0 0 eth1
132.248.25.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
192.169.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
Sou muito novo no Linux, então não sei exatamente o que estou procurando. Meu palpite é que o gateway padrão está funcionando ou o firewall está causando problemas.
Qualquer conselho / ajuda seria apreciado.
Os resultados de ip a:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 00:30:48:fe:a7:3c brd ff:ff:ff:ff:ff:ff
inet 132.248.25.125/24 brd 132.248.25.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::230:48ff:fefe:a73c/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 00:30:48:fe:a7:3d brd ff:ff:ff:ff:ff:ff
inet6 fe80::230:48ff:fefe:a73d/64 scope link
valid_lft forever preferred_lft forever
E para ip r:
132.248.25.0/24 dev eth0 proto kernel scope link src 132.248.25.125
Comente um gateway. Aquele sem conexão com a Internet:
#gateway 192.169.1.10
A configuração padrão pode ter apenas um e sua rota mostra que é o gateway interno usado agora.
Se houver outras redes por trás desse gateway, adicione isto:
post-up /sbin/ip route add 192.169.X.0/24 via 192.169.1.10
post-down /sbin/ip route del 192.169.X.0/24 via 192.169.1.10
para todas as redes atrás do gateway interno.
Tags internet networking debian firewall