Network Unreachable when uploading gpg public key

Question

I'm trying to upload my gpg public key in order to deploy releases of my Maven artifacts to Maven Central. But when I run the following command:

gpg --keyserver keyserver.ubuntu.com --send-keys E655AF47

I get the following error:

gpg: sending key E655AF47 to hkp://keyserver.ubuntu.com
gpg: keyserver send failed: Network is unreachable
gpg: keyserver send failed: Network is unreachable

I am using gpg (GnuPG) 2.3.6 on MacBook.

Where am I going wrong here?

Answer 1

Looks like these servers not permit such mechanism anymore...

First, try to specify https protocol explicitly:

gpg --keyserver https://keyserver.ubuntu.com --send-keys E655AF47

If that is also not working, then you must upload it manually:

1. copy your public key:

gpg --armor --output public-key.gpg --export your@email.com
cat public-key.gpg | pbcopy

where your@email.com you can find with gpg --list-signatures command

2. go to https://keyserver.ubuntu.com/
3. Click Submit Key button
4. Paste your public key you've copied in 1st step with pbcopy command and submit it
5. Verify your submission like so:

https://keyserver.ubuntu.com/pks/lookup?search=0D6866D45122F4B762BBA078CA756566F2B91BC1&fingerprint=on&op=index

where 0D6866D45122F4B762BBA078CA756566F2B91BC1 your keyid, which you can also find with gpg --list-signatures command