sudo apt-key adv --keyserver hkp://keys.gnupg.net:80 --recv-keys [key to get here]

Getting OpenPGP keys for Launchpad PPAs on Debian based systems from behind a firewall

If you are an unlucky soul behind a corporate firewall you will likely find that downloading gpg keys is blocked. This is because the hkp protocol uses port 11371 by default to transfer the key. By adding "hkp://" to the beginning of the hostname and ":80" to the end you are asking gpg to try using port 80 to connect (less likely to be blocked by a firewall). This relies on the remote server answering to requests over port 80.
Sample Output
Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /tmp/tmp.wuFtC4zNMi --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyserver hkp://keys.gnupg.net:80 --recv-keys 1C4CBDCDCD2EFD2A
gpg: requesting key CD2EFD2A from hkp server keys.gnupg.net
gpg: key CD2EFD2A: public key "Percona MySQL Development Team <mysql-dev@percona.com>" imported
gpg: Total number processed: 1
gpg:               imported: 1

0
By: phattmatt
2013-07-23 08:29:40

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