I just tried to connect to my account/channel/profile at https://walkaway.space/@Petros (Mastodon). tried both forms of the address, with default protocol, [ostatus] and [activitypub].

I keep getting "Remote channel or protocol unavailable." and "Channel discovery failed."

Please advise.
  
if  you "absolutely" need to federate with mastodon or diaspora...
take a look here https://start.hubzilla.org/wiki/jamie/Hubzilla%253A%2B%2B%2Bfind%2B%2Ba%2Bpublic%2Bhub/Home