Different Local IPs on same modem. Why?

[hellwisp]

The modem my ISP gave me has different local IPs on the two internet ports it has (other two are for television). I can only access the modem through one of the ports that has the usual 192.168... IP. The other port has a similar Default Gateway as my Public IP. I don't know if it is safe to post my ipconfig information because I'm dumb as bread.. so I won't.The problem is that I can't play games with my buddy through LAN. Anyone has any ideas how to fix this?

[Electronics Wizardy]

get a switch and connect it to the port.

[paddy-stone]

8 minutes ago, hellwisp said:

The modem my ISP gave me has different local IPs on the two internet ports it has (other two are for television). I can only access the modem through one of the ports that has the usual 192.168... IP. The other port has a similar Default Gateway as my Public IP. I don't know if it is safe to post my ipconfig information because I'm dumb as bread.. so I won't.The problem is that I can't play games with my buddy through LAN. Anyone has any ideas how to fix this?

Umm, the "modem" which I guess is a modem/router, because modems don't work that way... anyway, they don't have fixed IPs that you then connect to, it hands out IPs according to it's parameters if using DHCP, or you set a manual IP address.

If you haven't altered any settings it should be set to DHCP by default, and then if you and your friend both connect to it via either wifi or ethernet cable, should have you on the same network.

[sazrocks]

One is a kind of passthrough (network gurus plz correct me with the right word), on which you are getting the public ip, but the other is a normal LAN port. Get a proper router and it will work.

[hellwisp]

20 minutes ago, sazrocks said:

One is a kind of passthrough (network gurus plz correct me with the right word), on which you are getting the public ip, but the other is a normal LAN port. Get a proper router and it will work.

The modem had the same local IP's until recently.. and resetting it did not fix the problem. I had another router previously that died.. so I guess the best solution would be to get a new router. Another dumb question though..  what's the difference between a switch and a router?

[Guest]

5 hours ago, hellwisp said:

The modem my ISP gave me has different local IPs on the two internet ports it has (other two are for television). I can only access the modem through one of the ports that has the usual 192.168... IP. The other port has a similar Default Gateway as my Public IP. I don't know if it is safe to post my ipconfig information because I'm dumb as bread.. so I won't.The problem is that I can't play games with my buddy through LAN. Anyone has any ideas how to fix this?

4 hours ago, hellwisp said:

The modem had the same local IP's until recently.. and resetting it did not fix the problem. I had another router previously that died.. so I guess the best solution would be to get a new router. Another dumb question though..  what's the difference between a switch and a router?

What do you mean by different IP addresses depending on which port you connect to? If you plug an ethernet cable between your PC and the port on the modem/router, what IP addresses are you given (shown via ipconfig)

 

As for switches vs routers, in their simplest form routers route traffic. If it's destined for the internet, it'll go through the router and out to your ISP. Switches in their basic form switch traffic internally. A standard switch operates at a layer 2 or MAC address layer - it has a table of MAC addresses that it builds and ties those to the ports it has. Each network device has a unique MAC address. If your PC sends data destined for a printer, it'll go to the switch, the switch will say I've received information in on port 1 from this MAC address destined for MAC B. MAC B is on port 2 and thus I'll send the data through to port B.

 

1. Routers operate at layer 3 or the IP address layer and are used to route traffic between two or more subnets as well as provide essential services like NAT and DHCP to clients. A subnet is a range of addresses eg 192.168.0.1 - 192.168.0.254 (also known as 192.168.0.1/24 in CIDR form)
2. NAT or network address translation is the solution to having a limited number of IP addresses in the world - if your PC sends a packet out to say YouTube, it'll go out on port 53439 with your WAN IP address. When YouTube responds, it doesn't respond to your PC at 192.168.0.30, instead it responds to your WAN IP address and the port number. Your router then looks up that port number in its NAT table and passes those packets through but now with your internal IP address in them and not the WAN IP address.
3. DHCP or dynamic host configuration protocol is what assigns IP addresses and provides DNS servers and a gateway to each client connected to the network. For most people these are built into the router but in business and enterprise environments these can be configured on separate servers. Eg Windows Server has a DNS and DHCP ability.

 

 

[hellwisp]

1st port:

Ethernet adapter Ethernet:

   Connection-specific DNS Suffix  . : apollo.lv
   Link-local IPv6 Address . . . . . : fe80::e08e:1335:6313:202a%5
   IPv4 Address. . . . . . . . . . . : 87.110.125.208
   Subnet Mask . . . . . . . . . . . : 255.255.252.0
   Default Gateway . . . . . . . . . : 87.110.124.1

Tunnel adapter Local Area Connection* 10:

   Connection-specific DNS Suffix  . :
   IPv6 Address. . . . . . . . . . . : 2001:0:5ef5:79fd:1885:3f11:a891:822f
   Link-local IPv6 Address . . . . . : fe80::1885:3f11:a891:822f%8
   Default Gateway . . . . . . . . . : ::

Tunnel adapter isatap.apollo.lv:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . : apollo.lv
 

2nd port

Ethernet adapter Ethernet:

   Connection-specific DNS Suffix  . : lan
   Link-local IPv6 Address . . . . . : fe80::903:da54:9ba1:a9d5%12
   IPv4 Address. . . . . . . . . . . : 192.168.1.85
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 192.168.1.254

Tunnel adapter Teredo Tunneling Pseudo-Interface:

   Connection-specific DNS Suffix  . :
   IPv6 Address. . . . . . . . . . . : 2001:0:5ef5:79fd:3877:3133:c1aa:cff6
   Link-local IPv6 Address . . . . . : fe80::3877:3133:c1aa:cff6%15
   Default Gateway . . . . . . . . . : ::

Tunnel adapter isatap.lan:

Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . : lan

 

Also I can't host a server from the 1st port.

 

[paddy-stone]

Well to me (not an expert), it looks like your 1st port is set as your IPTV port, so it has a direct connection to your WAN, the router is passing all traffic down that port to the WAN server. If you go into your router settings, if you go into internet setup, it might have a drop down box for setting up your IPTV, mine has and I just had to switch the port to "enable this interface" untick the box, restart the modem/router and the port will just be back to a regular gigabit port.

If this isn't the case, it might be worth looking in your routers ducumentation, it'll most likely say something about which port(s) are used for IPTV.

[hellwisp]

1 hour ago, paddy-stone said:

Well to me (not an expert), it looks like your 1st port is set as your IPTV port, so it has a direct connection to your WAN, the router is passing all traffic down that port to the WAN server. If you go into your router settings, if you go into internet setup, it might have a drop down box for setting up your IPTV, mine has and I just had to switch the port to "enable this interface" untick the box, restart the modem/router and the port will just be back to a regular gigabit port.

If this isn't the case, it might be worth looking in your routers ducumentation, it'll most likely say something about which port(s) are used for IPTV.

The other two ports are for iptv

Ethernet adapter Ethernet:

   Connection-specific DNS Suffix  . : iptv.lattelecom.lv
   Link-local IPv6 Address . . . . . : fe80::e08e:1335:6313:202a%5
   IPv4 Address. . . . . . . . . . . : 10.210.41.47
   Subnet Mask . . . . . . . . . . . : 255.255.240.0
   Default Gateway . . . . . . . . . : 10.210.32.1

[hellwisp]

Maybe I have a proxy or a VPN that I don't know about? But it's on one specific port.

[hellwisp]

OK I'll just buy a router

[paddy-stone]

3 hours ago, hellwisp said:

The other two ports are for iptv

Ethernet adapter Ethernet:

   Connection-specific DNS Suffix  . : iptv.lattelecom.lv
   Link-local IPv6 Address . . . . . : fe80::e08e:1335:6313:202a%5
   IPv4 Address. . . . . . . . . . . : 10.210.41.47
   Subnet Mask . . . . . . . . . . . : 255.255.240.0
   Default Gateway . . . . . . . . . : 10.210.32.1

Have you tried those other ports though?

 

But if you still can't get it working, don't bother buying another router, you only need a switch.

[brwainer]

You can either get a switch and connect it to the 192.168 port, or get a router and connect it to the one that is providing a public IP