Using AC1200 C6220 as an Access Point

brnadonM
Aspirant
Nov 19, 2020
Hey sir, now my IPv4 Address of the PC connected directly to the C6220 is the same as the external ip address. I cannot connect to 192.168.0.250 from my PC connected directly to the C6220. I can't connect to 192.168.0.1 either.

But when I connect my laptop to the C6220 (working as an access point) through wifi, I can access both of these. It works with ethernet too. What's wrong with my computer?

Thank you
- 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?

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Using AC1200 C6220 as an Access Point