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Always Free: NO NETWORK after Upgrade from Ubuntu 20.04 LTS ARM to Ubuntu 22.04 LTS ARM.

Accepted answer

I upgraded yesterday from Ubuntu 20.04 LTS to Ubuntu 22.04 LTS. I've done this several times and I'm quite knowledgeful on Linux, so should've an easy scenario....

However, after upgrading I lost total connection to the host and I'm only able to access it through Cloud Shell Console. I tested whether this was an issue with the SSH keys as other pointed out since RSA is no longer accepted and ECDSA now is recommended, but this is not the issue.

Public IP is not reachable, I'm unable to reach internet either while trying to do "apt update" or nslookup

I tried fiddling around with netplan, checking services, rebooting, but can't seem to find the issue. I havent made any changes to the VCN and it was working previously as I host a website this server was reacheable through SSH and HTTPS.

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