Able to use web UI but server is unable to connect to internet

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shactheorb

Member
Mar 20, 2023
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My gateway is 192.168.1.1 and I reserved 192.168.1.10 for my Proxmox server. I can access the Proxmox web UI through 192.168.1.10:8006 and all of my VMs work fine, but whenever I try to ping any address (local or external) from the shell it either times out or does nothing. I'm unable to update my proxmox server because of this.

A few months ago I changed routers to an OPNsense router, and the previous IP address was 192.168.4.141. Not sure if that's relevant but couldn't hurt to mention.

Any ideas on what I can try? Thanks
 
please post the network config (/etc/network/interfaces) of your PVE system..
 
Here's the contents of the interfaces file:

auto lo
iface lo inet loopback

iface enp0s25 inet manual

auto ens1f0
iface ens1f0 inet manual

auto ens1f1
iface ens1f1 inet manual

auto vmbr0
iface vmbr0 inet static
address 192.168.1.10/24
gateway 192.168.1.1
bridge-ports enp0s25
bridge-stp off
bridge-fd 0

auto vmbr1
iface vmbr1 inet manual
bridge-ports ens1f0
bridge-stp off
bridge-fd 0

auto vmbr2
iface vmbr2 inet manual
bridge-ports ens1f1
bridge-stp off
bridge-fd 0

And while I'm at it, here's the result of running "ip a"

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
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: enp0s25: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UP group default qlen 1000
link/ether 98:90:96:e1:53:a1 brd ff:ff:ff:ff:ff:ff
6: tap100i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000
link/ether da:fe:bf:c6:51:88 brd ff:ff:ff:ff:ff:ff
inet6 fe80::d8fe:bfff:fec6:5188/64 scope link
valid_lft forever preferred_lft forever
7: veth101i0@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether fe:33:52:3c:c7:47 brd ff:ff:ff:ff:ff:ff link-netnsid 0
inet6 fe80::fc33:52ff:fe3c:c747/64 scope link
valid_lft forever preferred_lft forever
16: tap300i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master fwbr300i0 state UNKNOWN group default qlen 1000
link/ether ae:0e:7c:9b:3f:21 brd ff:ff:ff:ff:ff:ff
17: fwbr300i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 5e:e2:a0:5e:11:ca brd ff:ff:ff:ff:ff:ff
18: fwpr300p0@fwln300i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 66:c7:a3:18:d8:dc brd ff:ff:ff:ff:ff:ff
inet6 fe80::64c7:a3ff:fe18:d8dc/64 scope link
valid_lft forever preferred_lft forever
19: fwln300i0@fwpr300p0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master fwbr300i0 state UP group default qlen 1000
link/ether 66:a7:cd:dc:a0:0d brd ff:ff:ff:ff:ff:ff
23: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 98:90:96:e1:53:a1 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.10/24 scope global vmbr0
valid_lft forever preferred_lft forever
inet6 fe80::9a90:96ff:fee1:53a1/64 scope link
valid_lft forever preferred_lft forever
24: vmbr1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether d2:47:46:c8:64:6b brd ff:ff:ff:ff:ff:ff
25: vmbr2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether a6:40:13:38:4f:cd brd ff:ff:ff:ff:ff:ff
26: tap230i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master fwbr230i0 state UNKNOWN group default qlen 1000
link/ether 2e:7f:c7:52:b1:50 brd ff:ff:ff:ff:ff:ff
27: fwbr230i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 8e:87:1f:09:af:e2 brd ff:ff:ff:ff:ff:ff
28: fwpr230p0@fwln230i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
link/ether fe:82:e9:b7:88:7b brd ff:ff:ff:ff:ff:ff
29: fwln230i0@fwpr230p0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master fwbr230i0 state UP group default qlen 1000
link/ether 92:aa:92:80:16:b5 brd ff:ff:ff:ff:ff:ff
 
does "ping 8.8.8.8" work? what about the contents of "/etc/resolv.conf" ?
 
1736436475355.png

Nothing happens when I ping 8.8.8.8 or 1.1.1.1, the same thing happens if I try to ping any device on my local network like my router/gateway 192.168.1.1 or my personal computer, 192.168.1.115

Here's the contents of /etc/resolv.conf:

search local
nameserver 1.1.1.1
 
I think I fixed the issue by flushing the ARP cache in my OPNsense router. In OPNsense you can do this in the OPNsense GUIby going to Interfaces > Diagnostics > ARP Table, then click "flush", going to test further to make sure
 
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