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The UFW rules you showed are valid for IPv6 protocol, not for IPv4.
Check your IPv4 rules, i.e. ones which do not include (v6) mark.
Your database listening port TCP 5434 is IPv4 type port, but the ...
Just install the aziokbd driver, it worked for me:
sudo apt-get install mercurial build-essential linux-headers-generic dkms
git clone https://github.com/teitss/aziokbd