Question. Did XMPP ever solve the firewall traversal problem. What I found back when I used XMPP was that I simply could not use it on a lot of networks because the server port would be blocked. 443 would often work but not all XMPP servers support 443. Not sure but maybe NAT traversal was sometimes an issue too.

Thanks for the post. Kind of blast from the past. Mostly XMPP as died and blown away in my neck of the woods but some people still use it. I think the fsf does, and maybe duckduckgo has a server. All for it coming back though, but good luck with that. I’ll keep it in mind though in the event I have an application. Thanks.