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

**Scenario is the following:** I upgraded from Ubuntu 20.04 LTS to Ubuntu 22.04 LTS. However, after upgrading I lost total connection to the host and I'm only able to access it through Cloud Shell Console. **Observed behavior:** - SSH is no accesible through Public IP. Only Cloud Shell through Serial Console. Tested if key exchange RSA was the issue since now its recommended ECDSA, but this doesn't seem to be the issue. - Unable to reach any source while doing sudo apt update - nslookup google.es won't give any output (unreachable) - ip addr IP Interfaces are up: 1: lo: 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: ens3: mtu 9000 qdisc mq state UP group default qlen 1000 link/ether 02:00:17:00:95:86 brd ff:ff:ff:ff:ff:ff inet 10.0.0.62/24 metric 100 brd 10.0.0.255 scope global dynamic ens3 valid_lft 62767sec preferred_lft 62767sec inet6 fe80::17ff:fe00:9586/64 scope link valid_lft forever preferred_lft forever - ip route output: default via 10.0.0.1 dev ens3 proto dhcp src 10.0.0.62 metric 100 10.0.0.0/24 dev ens3 proto kernel scope link src 10.0.0.62 metric 100 10.0.0.1 dev ens3 proto dhcp scope link src 10.0.0.62 metric 100 169.254.169.254 via 10.0.0.1 dev ens3 proto dhcp src 10.0.0.62 metric 100 - iptables -L output: Chain INPUT (policy DROP) target prot opt source destination Chain FORWARD (policy DROP) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination - The output for iptables-save -c out is as follows: :INPUT DROP [71948:4580785] :FORWARD DROP [0:0] :OUTPUT ACCEPT[59782:3909997] COMMIT # Completed on Tue Aug 16 08:10:43 2022 - Netplan has only 1 configuration filed called 50-cloud-init.yaml which contains the following:

ethernets:
        ens3:
            dhcp4: true
            match:
                macaddress: 02:00:17:00:95:86
            set-name: ens3
    version: 2

- /etc/resolv.conf output: nameserver 127.0.0.53 options edns0 trust-ad search vcn09040100.oraclevcn.com - Im not sure if this an Oracle Cloud configuration issue, although I havent touched anything and it was working before and hosting a website. VCN vcn-20210904-0043 is assigned with a subnet of 10.0.0.0/24 and the following Ingress Security List I'm running out of ideas and any help is GREATLY appreciated. I have other instances running on the same tenant sharing same VCN and have no problems whatsoever....so I'm inclined to think this is a OS issue.