[SOLVED] Help with Networking Problem

[Nedboygamer]

Hey there


First off, I'm a complete beginner, and everything I’ve done so far is thanks to YouTube and ChatGPT.
I have a problem connecting to my Proxmox server (an old laptop of mine). Pasting the IP address and port into Chrome doesn’t load.
I can ping my main PC from the server, but not the other way around.
I had a connection working before, but I don’t know what caused it to stop, and I lost it afterward.
When I ping from the server to the PC, I get a connection, but as soon as I stop pinging, the connection drops.

The current /etc/network/interfaces looks like this:

"
auto lo
iface lo inet loopback

iface nic0 inet manual

auto vmbr0
iface vmbr0 inet static
address 192.168.1.165/24
gateway 192.168.10.1
bridge-ports nic0
bridge-stp off
bridge-fd 0
"

Please ask if you need more information, as I’m not sure what’s important for pinpointing the problem.

 

[Mr.Doubt]

Is there a typo in the address or gateway? Your gateway is not in your network
What is the address of your PC (Windows ipconfig Linux ip -br a s)

 

[alexskysilk]

you CAN have a gateway outside the scope of a subnet, BUT it will only work one way- traffic will route OUT to the gateway properly but incoming traffic will not.

OP, pay attention to what your PC address is and gateway. if its not in the same subnet as your pve host, it will not route properly.

 

[gfngfn256]

All the above posters have clearly given you the correct reason as to what is wrong with your NW setup.

Since you seem to be a ChatGPT fan, I'm not sure why you didn't just query ChatGPT with the following:

What is wrong with the following interfaces file:
auto vmbr0
iface vmbr0 inet static
address 192.168.1.165/24
gateway 192.168.10.1
bridge-ports nic0
bridge-stp off
bridge-fd 0

I tried it and he got the correct answer:

The issue is with your network addressing and gateway mismatch.

You’ve configured:

address 192.168.1.165/24
gateway 192.168.10.1

These are in different subnets:

192.168.1.165/24 → subnet: 192.168.1.0 – 192.168.1.255
192.168.10.1 → subnet: 192.168.10.0 – 192.168.10.255

A gateway must be reachable within the same subnet as the interface IP. Right now, your system won’t be able to reach the gateway directly, so routing will fail.

He then goes on to give you the correct fix.

I've never used any AI before - but decided to do this for the above query due to your post.

I think it is both fascinating & sad that people build servers based on Youtube & AI!

 

[Nedboygamer]

Thanks to you all

I've made a typo while writing down the adresses.

in reality it is:

address 192.168.1.165/24
gateway 192.168.1.1

so they both are in the same subnet.(at least i think)

pc ip is 192.168.1.154
and the subnet mask is 255.255.255.0

 

[tayyab.shah]

iface nic0 inet manual

issue seems to be here before if should have been like
auto nic0
iface nic0 inet manual
so you are missing (auto nic0) before iface line . so system is not starting your network on boot you are likely will not have access to gui add that line then restart newrorking or system and try again to login to gui.

 

[Nedboygamer]

so you are missing (auto nic0) before iface line . so system is not starting your network on boot you are likely will not have access to gui add that line then restart newrorking or system and try again to login to gui.

i corrected it, and added that line, but nothing changed

 

[tayyab.shah]

i corrected it, and added that line, but nothing changed

did you reload networking or restart networking after make changes in the file ( ifreload -a). i had the same issue this works for me .

 

[Mr.Doubt]

What is the output of ip l sh

 

[Nedboygamer]

did you reload networking or restart networking after make changes in the file ( ifreload -a). i had the same issue this works for me .

now it works.

thanks so much