So this small ruleset in the Apache reverse proxy config on my Mastodon instance seems to work fine for the time being:

RewriteCond %{HTTP_USER_AGENT} \(GabSocial\/ [NC]
RewriteRule .* - [F]

[10/Jul/2019:16:46:32 +0200] "POST /inbox HTTP/1.1" 403 4105 "-" "http.rb/3.3.0 (GabSocial/2.8.4; +https://gab. com/)"

Unfortunately providing an error code other than 403 seems not as easy.

Sign in to participate in the conversation
INFRa Mastodon

This Mastodon instance is not open for public registration. Site administrator is Alexander Bochmann.

Contact email: