Gmod - Unable to Connect from Internet. LAN Works Fine

[tbonanno4]

Basic Info
Server OS: Ubuntu Release 12.04 (precise) 64-bit
Processor: i5 2500k
RAM: 8GB
Game: Garry's Mod
Start Up Command: orangebox/srcds_run -console -game garrysmod +maxplayers 16 +map gm_construct -autoupdate
Admin Mods: None

Network and Bandwidth Info
Downlink: 107 Mbps
Uplink: 21 Mbps
http://www.speedtest.net/result/2338167042.png

Router: Netgear N600 WNDR3700 - Wired Connection
Comcast Router: SMC SMCD3GNV

Netgear is connected to the Comcast router, which pretty much only serves as a modem, but also performs routing functions like port forwarding

Local IP of Router: Netgear is 192.168.1.1 on the LAN side
Between the two routers, the Netgear's address is 10.0.1.69 and the Comcast router is 10.0.0.1

External IP: 98.231.188.83

Port Forwarding:

Comcast Router: http://gyazo.com/da5aa692b2aed1076929e5d5bf49e8b1.png?1354136108

Netgear Router: http://gyazo.com/7531c7eea756b0c4297894cc958cd676.png?1354136124

On the Netgear router:
Source1 - UDP
Source2 - UDP
Source3 - UDP
Source4 - TCP
Source5 - UDP
Source6 - TCP

Server.cfg

Code:

hostname        "The Impeesa Staff"

sv_password        "saff"

rcon_password        ""

sv_voiceenable        "0"

sv_minrate         "0"

sv_maxrate        "20000000"

net_maxfilesize        "64"

sv_allowupload        "1"

sv_allowdownload    "1"

sv_lan            "0"



exec startup.cfg

Here's a diagram of my home network:
http://gyazo.com/a0fd2f82133e222842713a809d835b0d.png?1354136529




Now, to the issue. I have sv_lan set to 0, and I have TCP/UDP forwarded on 27015 to the IP of my server. However, although I can connect and play from my PC, none of my friends over the internet can see the server. They see this: http://gyazo.com/9690f129099d2128f7a5986030ce0105.png?1354136597

I have checked the port (even though it is forwarded properly) and I see that it is apparently closed: http://gyazo.com/4591ea766197f379c27cc639b60e1927.png?1354136636

I've tried googling for other possible ports to forward, so I've tried those as well. But to no avail.

Any ideas would be greatly appreciated.

[frewiheixauhi]

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