Can't communicate with server list ping protocol 4

This isn't technically a Bukkit issue - I've tried the most recent versions of the standard server as well as the Spigot server, and they all have the same problem for me.

Essentially, I'm trying to set up a ping service for my website to give server status / player info / etc. I am able to use the fallback protocol (lists as 127) perfectly fine, but I get no response from protocol 4. I have used the same code to successfully parse other servers running 1.7.2, but for my own local server I have to fall back to the old protocol.

I've even completely opened the local firewall for testing with no success.

Is anyone able to shed any light on this?

I've even tried hosting from both Windows and Linux, no change. Very confused!

---

You can see this by going to http://wiki.rimpo.us -- feel free to create other wiki pages and test it using {{mquer:serverdomain.or.ip|port}} in the wikitext. The primary display uses the gamespy protocol, but there is a debug array that will be rendered below using the protocol response. It falls back to the old protocol if the new one sends no data.

 

Do you have query enabled? Post your server.properties and startup log.

 

Sorry for the long delay. It's enabled.

Code:

#Minecraft server properties
#Mon Mar 17 22:29:45 CDT 2014
generator-settings=
op-permission-level=4
allow-nether=true
level-name=world
enable-query=true
allow-flight=false
announce-player-achievements=true
server-port=25565
query.port=25565
level-type=DEFAULT
enable-rcon=false
force-gamemode=false
level-seed=
server-ip=
max-build-height=256
spawn-npcs=true
debug=false
white-list=false
spawn-animals=true
hardcore=false
snooper-enabled=true
online-mode=true
resource-pack=
pvp=false
difficulty=1
enable-command-block=false
server-name=SilCraft Redux
gamemode=0
player-idle-timeout=0
max-players=20
spawn-monsters=true
generate-structures=true
view-distance=10
spawn-protection=16
motd=A do-what-you-want server for SilCraft veterans.

Server startup: http://pastebin.com/y62nvXvD

 

Locked. Unofficial builds are not supported here.