Docker.io - Running behind a proxy

Morning all,

Attempting to get Docker running behind my companies proxy. Due to internal policy reasons they won’t give me the certificate needed to do this correctly, so they are adding exceptions to the firewall(I dunno why this is safer".

Anyway we have it so I can search the repository now, but when I try to do a pull I get the following error:

f05ed305aec0: Error pulling image (helium) from mattermost/platform, x509: certificate signed by unknown authority

Output from a search:

sudo docker search mattermost
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
mattermost/platform 1 [OK]

Suggestions? Here are the URLs we currently have added exceptions for registry-1.docker.io & index.docker.io.

Thanks much!