Vagrant + Xdebug + Atom

Question

I have a vagrant box with xdebug installed, running on OSX, but Im struggling to get the Atom xdebug plugin (php-debug) to connect to it.

I pasted the

Answer 1

But that is a slightly confusing as remote_connect_back=1 means xdebug will ignore the remote_host setting

You are correct -- that option is not needed there -- it better be set to 0

xdebug.remote_host=127.0.0.1

This is wrong (unless you will be doing debugging via SSH tunnel). It must be an IP where debug client (Atom in your case) is running. It's xdebug who connects to client and NOT other way around: https://xdebug.org/docs/remote

This also means that the IP must be as seen from that Vagrant machine. Possibly the easiest way of getting it -- look at what $_SERVER['REMOTE_ADDR'] has.

I have mapped port 9000 in the vagrant file.

config.vm.network :forwarded_port, guest: 9000, host: 9000

You do not need to expose 9000 port in Vagrant -- nobody will be connecting to it (like you do with port 80 for web server) -- it's xdebug from VM/guest OS will be connecting outside to your "real"/host OS.

If anything -- you should be allowing outgoing connections on that port instead of incoming.

If I check who is listening on port 9000

This one means that Atom is unable to receive incoming xdebug connection over TCPv4 .. which xdebug will try to use by default (unless you specify IPv6 address in xdebug.remote_host).

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If anything -- collect xdebug log (xdebug.remote_log) and see where it tries to connect etc.

Answer 2

@LazyOne already answered this question, but issue I had was caused by antivirus (MCAfee) which was blocking incoming traffic. Maybe this will help someone in the future.