Intranet IPs

Uiop

Solid State Member
Messages
16
I'm trying to configure my firewall to block all connections to the Internet, while still allowing access to other computers on my LAN and local IP address assignment by my router's DHCP service. Which IP ranges do I need to allow?
 

Celegorm

Site Team
Staff member
Messages
11,741
Location
USA
Generally, all LAN IP's are 192.168.(0 or 1).0-299 If you can set your firewall to only allow connections with 192.168.* (star being wild card) All network activity should be allowed, but no Internet activity.
 

Uiop

Solid State Member
Messages
16
I've tried that. With that firewall configuration I cannot use network printers or recive my local IP address via DHCP.
 

Celegorm

Site Team
Staff member
Messages
11,741
Location
USA
Check in your router for a setting on disabling internet. I know my sister's Linksys had that option.
 

dude_se

Proper Legend
Messages
8,633
Location
UK
ok i think my post before may not have helped, because do you still need the internet? or do you want it blocked for everyone including you?
 

Uiop

Solid State Member
Messages
16
I don't want to change router settings. The Internet should be blocked on a per computer basis.
 

LiveWire

Baseband Member
Messages
86
Best thing to do would be assign static IP addresses, or assign your DHCP server to set unlimited lease time on the addresses. Then, block the computers you want in your server's settings. (I guess it's a router in this case?)

By the way: IPv4 Addresses only go up to 255 (255.255.255.255)
 
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