Skip this paragraph if you don't want to hear about me. I am not a network engineer, I am not a software engineer. I am a video editor. I maintain a small network of storage servers, and have for quite a while. I have picked up a good bit of networking along the way, and have friends who work in the field (and yes I've asked them about this). I also have never posted to a forum like this before, so feel free to tell me what I'm doing wrong.
This problem started after a reboot of the server. I have no other information about what could have caused it, and I'm baffled as to how it could possibly happen.
Ubuntu version is: VERSION="20.04.3 LTS (Focal Fossa)"
Upon logging in via ssh, the server reports that enp6s0 has the ip address 192.168.0.5 (the address I use for ssh, and accurate to the dhcp server) and 192.168.1.2.
Output of server upon SSH connection being established:
Usage of /: 2.9% of 915.89GB Users logged in: 0
Memory usage: 2% IPv4 address for enp6s0: 192.168.0.5
Swap usage: 0% IPv4 address for enp6s0: 192.168.1.2
Running the ifconfig command yields the following result:
enp6s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.0.5 netmask 255.255.255.0 broadcast 192.168.0.255
inet6 fe80::225:90ff:fe00:d2e0 prefixlen 64 scopeid 0x20<link>
ether 00:25:90:00:d2:e0 txqueuelen 1000 (Ethernet)
RX packets 3649 bytes 600206 (600.2 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1260 bytes 130567 (130.5 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 16 memory 0xfbce0000-fbd00000
enp7s0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 00:25:90:00:d2:e1 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 17 memory 0xfbde0000-fbe00000
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 205 bytes 16928 (16.9 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 205 bytes 16928 (16.9 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Reporting only the "correct" ip. However, upon attempting to ping "www.google.com" the following occurs:
From 192.168.1.2 (192.168.1.2) icmp_seq=1 Destination Host Unreachable
From 192.168.1.2 (192.168.1.2) icmp_seq=2 Destination Host Unreachable
From 192.168.1.2 (192.168.1.2) icmp_seq=3 Destination Host Unreachable
I can't think of a single reason that the server wouldn't have internet access. All other functions of the server seem to be normal, except for the fact that it cannot access the wider web.
My interfaces file:
auto enp6s0
iface enp6s0 inet static
address 192.168.0.5
netmask 255.255.255.0
gateway 192.168.0.1
dns-nameservers 192.168.0.107
Resolv.conf file:
# Generated by dhcpcd from enp6s0.dhcp
# /etc/resolv.conf.head can replace this line
nameserver 192.168.0.107
# /etc/resolv.conf.tail can replace this line
Where do I even start when troubleshooting this? Why is the server reporting two ipv4 addr for a single hardware interface? Why can't it access the internet/why is it trying from the "incorrect" interface?
And most importantly, how do I fix this?
Absolutely any help is appreciated - thanks.
