I’m currently trying to install Arch Linux on a new disk, but I’m encountering a networking issue that I can’t seem to resolve. I’m getting a “Destination Port Unreachable” error when I try to ping external addresses (e.g., Google DNS at 8.8.8.8). Here are the details:

• Connection Type: Wired Ethernet

• Router: I can successfully ping my router (192.168.0.1) from the Arch Linux environment.

• Current OS: Live USB with Arch Linux

• Other OS: On the same machine, everything works perfectly on Windows.

Background:

I previously had Kali Linux installed on this disk, but the internet suddenly stopped working entirely from one day to the next. I backed up the necessary data and formatted the disk. Now, I’m trying to install a new system, and this is the situation.

Additional Notes:

• No NAT Issues: Other devices, including the same machine on Windows, connect to the internet without problems.

• No DHCP Issues: IP address and default gateway are correctly assigned.

Current Symptoms:

• Can’t ping external IP addresses (e.g., 8.8.8.8) – “Destination Port Unreachable”.

• Local network (router ping) works fine.

Any advice on what I might be missing or what additional steps I should take would be greatly appreciated. Thanks in advance.

What i have tried so far:

1. Interface Status: Checked and the interface enp3s0 is UP and has an IP assigned (192.168.0.111).

2. Routing Table:

   
   
   
   default via 192.168.0.1 dev enp3s0
   
   
   
   default via 192.168.0.1 dev enp3s0 proto dhcp src 192.168.0.111 metric 100
   
   
   
   192.168.0.0/24 dev enp3s0 proto kernel scope link src 192.168.0.111 metric 100
   
   
   
   192.168.0.1 dev enp3s0 proto dhcp scope link src 192.168.0.111 metric 100
   
   
   
   

3. DNS Configuration: Manually set DNS in /etc/resolv.conf:

   
   
   
   nameserver 8.8.8.8
   
   
   
   nameserver 8.8.4.4
   
   
   
   

   Restarted systemd-resolved but still no luck.

4. Log Checks: Reviewed journalctl -xe but didn’t find any network-related errors.

5. Firewall: No firewall rules blocking traffic (iptables -L shows no blocks).

6. Attempted Diagnostics:

   • Tried traceroute but can’t install it without internet.

   • Can’t use arp as the command isn’t available in the live environment.