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Offline btomic

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Cannot access second router
« on: January 15, 2017, 08:59:22 AM »
Port forwarding used to work fine on several PCs at my home. However, after not having used it for a while I noticed that it's not working anymore. It looks like the ISP has installed their own router and so my wireless router (WRT54GL) is being assigned a local address. Here is the data from the router setup:

Login Type:     Automatic Configuration - DHCP         
IP Address:     100.64.67.251         
Subnet Mask:     255.255.192.0         
Default Gateway:     100.64.64.1

My IP address is 5.1xx.xxx.xxx.

As suggested I should access the second router and set port forwarding on it, however, I cannot access it (connection to 100.64.64.1 is refused even though I can ping it). Is there anything I can do to do make port forwarding possible again?

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Cannot access second router
« on: January 15, 2017, 08:59:22 AM »

Offline trpted

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Re: Cannot access second router
« Reply #1 on: January 15, 2017, 12:53:39 PM »
 If you do not see the non bogan IP Address anywhere in the your router it's screens, it first matters what the WAN IP Address in the router is:

a) From 100.64.0.0 - 100.127.255.255, then CGNAT/NAT444/LSN is present

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If you want more details about CGNAT/NAT444/LSN, you can look at

http://en.wikipedia.org/wiki/Carrier-grade_NAT

c) The possible fixes to fix your issue if CGNAT/NAT444/LSN is present.

#1 Have them in their NAT router forward the ports to the IP of your router..

#2 Upgrading the type of plan that you are on with your ISP so that you get a non bogan IP Address.

For example if you are a Residential Service Plan, consider going to a Business Service Plan.

#3 Consider switching to another ISP that can give you you a non bogan IP Address.

#4 For the long term future, get IPv6 working.

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b) From 10.0.0.0 to 10.255.255.255, from 172.16.0.0 to 172.31.255.255 OR from 192.168.0.0 to 192.168.255.255 - based upon your NAT router,  = RJ-45 WAN port router :

Step 1: Physically find your Linksys WRT54GL

Step 2: Find the WAN port of it.

Info: WAN port could be called Internet or To Modem or To ONT port.

Step 3: Report back what the brand and model of the device that is connected at the other end of the wire that is connected to the WAN port of the Linksys WRT54GL.

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c) If the WAN IP is not the same and is not any of these/those IP Address(es), it would be a good idea to check to see how the non bogan IP Address is not the same (and not NAT). If you need help finding why that is, you are to asking for help doing so.
Private messages (PM) are not for support questions or for hints to not yet answered topics. The PMs are basically for confident conversation between the users, off the forum.

Offline btomic

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Re: Cannot access second router
« Reply #2 on: January 16, 2017, 11:13:14 AM »
Thank you for such a detailed reply. If I understand correctly, my router (having the address 100.64.67.251) meets the 'a' scenario case in your reply (CGNAT/NAT444/LSN is present). From the list of suggested fixes I can only think of getting the IPv6 working at the moment. Even for that one I don't know how it would help and what it takes to do get it working.

The reason I wanted to do port forwarding was to set my WAMP server accessible from the outside. If that's not going to happen I'll have to move my server to the cloud which is something I can do.

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Re: Cannot access second router
« Reply #2 on: January 16, 2017, 11:13:14 AM »