I have a server running Debian 8 Jessie that constantly loses it's internet access for seemingly no reason. The server has two wired connections, the internet access is on eth0 and the internal network is on eth1. The internal connection is working as normal.
The content of /etc/network/interfaces is:
# 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) And for route -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 I'm very new to Linux so I'm not exactly sure what I'm looking for. My guess is that the default gateway is acting up, or the firewall is causing problems.
Any advice/help would be appreciated.
The results of 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 And for ip r:
132.248.25.0/24 dev eth0 proto kernel scope link src 132.248.25.125 
