Ubuntu Server cant Be Accessed Over IP or SHH But CloudFlare Tunnel Works Fine

[rahulsharma49]

made changes to YAML file but issue is still there, after some time i cant SSH or ping server.

It is connected to my router and i can access it from Cloudflare tunnel URL but cant access over local IP.

What can be wrong?

If there anything which i need to show you guys? please tell me

[TheFu]

10.0.0.100/8 does not map to 255.255.0.0.

I give up. We've told you already what is likely wrong and you've ignored it. Probably should learn some basic IPv4 networking if you hope to get this solved. I used to send people to read/listen to Ep 25 - 29 of Security Now podcast ... "How the internet works", where IPv4 networking is laid out clearly. There must be better guides these days. It isn't hard.

Most home users would have a /24 on their LAN which is the same as 255.255.255.0. If you don't understand it, probably best to stay with what everyone else does until you do.

Additionally, many home routers prevent traffic that leaves and tries to return using the WAN IP. Since I don't use Cloudflare tunnel, I don't know if that would be an issue or not.

[rahulsharma49]

Bro changed both Router Subnet Mask to 255.255.255.0 and ip address on Ubuntu with /24 as suggested by all.

Still issue is there

[TheFu]

Bro changed both Router Subnet Mask to 255.255.255.0 and ip address on Ubuntu with /24 as suggested by all.

Still issue is there

And still you haven't shown your work. You haven't posted the suggested yaml file with the suggested updates. You didn't post the 2 netplan commands that must be run to generate and active the new YAML and there's no --debug or relevant lines from the system logs shown. Very standard stuff for anyone choosing to run a "server".
With networking there are a few basic things.

• IP addresses
• network information
• routing tables

If you remove the Cloudflare tunnel, does everything work as expected? The basic steps for any troubleshooting is to

1. simplify
2. test,
3. repeat

until the thing that breaks it has been isolated and testing shows that 1 thing is the problem. For something like this, perhaps 3 rounds of simply/test/repeat is my guess.

[rahulsharma49]

Here is my updated YAML file

network:
  version: 2
  renderer: networkd
  wifis:
    wlp1s0:
      dhcp4: no
      dhcp6: no
      addresses: [10.0.0.100/24]
      nameservers:
        addresses: [10.0.0.1, 8.8.8.8]
      access-points:
        "mySSID":
          password: "mypassword"
      routes:
        - to: default
          via: 10.0.0.1

Two commands to generate and apply netplan are

• sudo netplan generate
• sudo netplan apply

Removing cloudflare tunnel makes no difference

[rahulsharma49]

is there any other logs which i can provide?

its very frustrating that server stops responding after sometime