This one command will attempt connection on port 11371 at pgp.mit.edu :
gpg --keyserver hkp://pgp.mit.edu \ --recv-keys A4A9406876FCBD3C456770C88C718D3B5072E1F5
hkp:// is for port 11371 :
grep hkp /etc/services
Tought it might be my firewall, but looking at the output of
sudo watch -d -n1 iptables -nvL
showed no packets being dropped at all. Didn’t go look at my home router, might
be that it filters out traffic (?).
Anyway, found out that one may request keys through port 80 :
gpg --keyserver hkp://pgp.mit.edu:80 \ --recv-keys A4A9406876FCBD3C456770C88C718D3B5072E1F5
==> Verifying source file signatures with gpg... mysql-connector-c++-1.1.9.tar.gz ... FAILED (unknown public key 8C718D3B5072E1F5) ==> ERROR: One or more PGP signatures could not be verified!