Using AC1200 C6220 as an Access Point

antinode
Guru
Nov 19, 2020
> Hey sir, now [...]

   What did you do? What, exactly, did you connect to what, exactly?

> I was wondering if it was possible to use this modem/router as an
> access point for another modem? [...]

   What is your "another modem"? If it's really a _modem_, and does not
include a router, then I'd expect problems. If you expect to connect
multiple client devices to your ISP, then you need a (NAT) router of
some kind, not only a WAP. And, as a general-purpose router, a model
Cxxxx is useless; it has no Ethernet WAN/Internet port.

> [...] What's wrong with my computer?

   I'd guess nothing, other than to what you connected it.
- brnadonM
  Aspirant
  Nov 19, 2020
  Hello,
  
  I made my modem/router C6220 as an access point per your instructions.https://community.netgear.com/t5/Cable-Modems-Routers/Can-I-use-a-C6300-cable-modem-without-cable-internet/m-p/1463500
  
  CONNECTIONS IS LIKE THIS:
  Computer A -> PHYSICAL LINK -> C6220 ACCESS POINT -> PHYSICAL LINK -> modem/router Arris -> COAXIAL CABLE ISP
  ^= Wireless Laptop
  
  I have connected this modem/router C6220 ACCESS POINT to my modem/router Arris (that is connected to the internet via Coaxial).
  
  Wireless devices (Wireless Laptop) connected to my modem/router C6220 ACCESS POINT function correctly. They have valid IPv4 addresses within the DHCP range I set (2-249) per your instructions, and can access the 192.168.0.1 settings of my modem/router Arris. These wireless devices can also access 192.168.0.250.
  
  Only problem is, when I physically connect my Computer A to the modem/router C6220 ACCESS POINT, it assigns my IPV4 as my external IP address, starts with 71.bla.bla.bla (seen from ipconfig). It is as if my Computer A is connected to a "DMZ."I can access the internet from Computer A, however I cannot access anything in the local network.
  
  From my Computer A, I cannot access the local network. So from Computer A , I cannot access 192.168.0.1 or [...].250.
  Whereas when I connect through wifi from a Wireless Laptop, to my modem/router C6220 ACCESS POINT . With the Wireless Laptop I can connect to the internet, with no hiccups. And I can also connect to the original modem/router Arris settings page. I can also connect to my modem/router C6220 ACCESS POINT via 192.168.0.250 from my Wireless Laptop.
  
  ATTEMPTED SOLUTIONS:
  I've tried solving this by changing my Computer A to static IPV4 settings in windows 10. I change it to 192.168.0.69 (within modem/router Arris 's DHCP range), and it could not connect to the internet, but it could connect to 192.168.0.250. It could not connect to 192.168.0.1 (modem/router Arris settings page).
  I've also tried solving this by changing my Computer A to static IPV4 settings in windows 10. I change it to 192.168.0.251 (outside modem/router Arris 's DHCP range), and it could not connect to the internet, but it could connect to 192.168.0.250. It could not connect to 192.168.0.1 (modem/router Arris settings page).
  I've tried reinstalling Network drivers of Computer A
  Tried connecting ~~Wireless~~ Laptop directly to the C6220 ACCESS POINT via Ethernet, and it still had a valid (same) ipv4 address it had before. So I think there's something wrong with my Computer A
  
  Are there additional C6220 ACCESS POINT router settings I should configure for this to work?
  How do I make it so that Computer A has a static IPv4 address where it can also connect to the internet?
  - brnadonM
    Aspirant
    Nov 19, 2020
    Hello,
    
    I followed this tutorial: https://community.netgear.com/t5/x/x/m-p/1463500 from antinode here.
    Then
    I fixed my issue by giving my Computer A a new MAC address.
    
    Thanks

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Using AC1200 C6220 as an Access Point