FG Knowledge Base - Firewalls

Quote:

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Originally Posted by DoubleDanGaming

So, I have an Arris SB6121 Modem going into an Apple Time Capsule (which is also a wireless router) on macOS Sierra, and I have not ever been able to pass the connection test. I could use a bit of a walkthrough...

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Welcome DoubleDanGaming.

Your Time Capsule may be acting as a Router/AP or just as an AP. Do a trace route to 8.8.8.8 and paste results here and it will give us some more info.

Performing a Traceroute in Mac OS X
If you are running Mac® OS X, you can use the Network Utility application, which is included with Mac OS X, to run the trace route.
To Perform a Traceroute in Mac OS X
Launch Network Utility.
You can do this through Mac OS X Spotlight by typing Network Utility, and then clicking the Top Hit.
Click Traceroute.
Enter 8.8.8.8 and Click Trace.
Select the results, and then right-click and select Copy or press COMMAND+C to copy the text.
Paste the text here in your reply.

Traceroute has started…

traceroute to 8.8.8.8 (8.8.8.8), 64 hops max, 72 byte packets
1 172.16.1.1 (172.16.1.1) 1.267 ms 1.249 ms 1.293 ms
2 96.120.41.33 (96.120.41.33) 11.404 ms 13.975 ms 10.415 ms
3 xe-11-1-0-sur01.muskegon.mi.michigan.comcast.net (68.85.218.13) 10.604 ms 8.762 ms 7.865 ms
4 te-9-4-ur03.wbloomfield.mi.michigan.comcast.net (68.85.223.110) 9.118 ms 10.171 ms 11.698 ms
5 xe-1-3-1-0-sur01.lyndon.mi.michigan.comcast.net (68.87.189.177) 22.245 ms 20.376 ms 23.701 ms
6 be-33668-cr02.350ecermak.il.ibone.comcast.net (68.86.90.45) 26.254 ms 25.710 ms 31.580 ms
7 be-10563-pe01.350ecermak.il.ibone.comcast.net (68.86.82.158) 24.920 ms 24.556 ms 24.938 ms
8 as40009-2-c.1950stemmons.tx.ibone.comcast.net (75.149.231.2) 23.622 ms 23.205 ms 23.715 ms
9 108.170.243.207 (108.170.243.207) 26.337 ms 24.356 ms 22.371 ms
10 209.85.254.240 (209.85.254.240) 23.565 ms 25.617 ms 26.233 ms
11 72.14.232.70 (72.14.232.70) 34.133 ms 34.884 ms 34.112 ms
12 72.14.234.81 (72.14.234.81) 32.856 ms 35.524 ms 32.813 ms

Good. It looks like there is only single NAT taking place.
If you browse to 172.16.1.1 is that your Arris router or is it the Time Capsule?

According to my AirPort Utility, that's the LAN IP address of my Time Capsule. But entering that IP into the browser draws only a "fail to connect to server" error.

Try this: https://owlr.uservoice.com/knowledge...airport-time-c

Except you are going to setup Private IP Address: your PCs address, Public TCP Ports: 1802, Private TCP Ports: 1802

What do you mean, "your PCs address"?

Every computer/device on your network has an ip address.
You need to on Step 4 use your computers IP address along with TCP ports 1802 on Private and Public.

How idiotic - I was a single number off in my original setup, which is why it never worked. I had found many resources previous, including the page you linked, but I never twigged onto using the IP address of my computer exactly - I let it choose the last number of the x.x.x.x itself. Now I have success! Bloody brilliant - thank you!

Or, considering your name...should that be "Damn you"?

Double Damn You thank you very much :)

Now on to more important things - hows about running an amazing one-shot session at FG Con!
https://www.fg-con.com/events

Aaaand it no longer works, and I have no idea why.

EDIT:. And now it does. *eye twitch*