windows firewall blocking ICS

#1
Hello

I'm currently sharing my internet connection with another computer (both run windows 7). The other computer can only access the internet if the computer holding the dial up connection has windows firewall turned off. I tried to add an exception in windows firewall for port 80 but did not have any effect.

The local area connection adapter on the computer that's holding the internet connection has the following settings:

IPv4 Address: 192.168.137.1
IPv4 Subnet Mask: 255.255.255.0
default gateway: 192.168.10.1
preferred DNS server: 208.67.222.222


the other computer has obtain IP and DNS address automatically

Using ADSL modem is a Sagem [email protected] 800 to connect to the internet

no router used, just a simple cat-45 cable (i think that's the name of the cable!)

Any help would be greatly appreciated

my first time on the forum, so a BIG hello to everyone and a happy new year!

Thanks!
 


patcooke

Microsoft MVP
Staff member
Premium Supporter
Microsoft MVP
#2
IPv4 Address: 192.168.137.1
IPv4 Subnet Mask: 255.255.255.0
default gateway: 192.168.10.1
preferred DNS server: 208.67.222.222
Before looking atthe ICS problem there is something wrong with this config. The IP address, default gateway and subnet mask are not compatible. For a default gateway of 192.168.10.1 and a subnet mask of 255.255.255.255 the IP address must be of the foram 192.168.10.*
 


#3
Before looking atthe ICS problem there is something wrong with this config. The IP address, default gateway and subnet mask are not compatible. For a default gateway of 192.168.10.1 and a subnet mask of 255.255.255.255 the IP address must be of the foram 192.168.10.*
hello patcooke

i have removed the default gateway ip, i wasnt sure why it was there, everything seems ok, but when i turn on windows firewall on, ICS doesnt function :/
 


#4
bump

anyone got any ideas? feel a bit naked without a firewall :)

could it be that i need to find out my other computers ip address and add it as an exception to windows firewall?

thanks
 


patcooke

Microsoft MVP
Staff member
Premium Supporter
Microsoft MVP
#5
hello patcooke

i have removed the default gateway ip, i wasnt sure why it was there, everything seems ok, but when i turn on windows firewall on, ICS doesnt function :/
You cannot just "remove" a default gateway - it is needed to access LAN and WAN components. Please post a full listing of your ipconfig so we can see the whole picture.
 


#6
just an update... when windows firewall is on, i get a "dns server not respondig" message when trying to resolve the internet connection on the other pc, (clicking on the red cross)
 


#7
ip config (of computer holding the internet connection)

Windows IP Configuration




Ethernet adapter Local Area Connection:


Connection-specific DNS Suffix . :
IPv4 Address. . . . . . . . . . . : 192.168.137.1
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 0.0.0.0


PPP adapter Internet ADSL:


Connection-specific DNS Suffix . :
IPv4 Address. . . . . . . . . . . : 41.142.90.142
Subnet Mask . . . . . . . . . . . : 255.255.255.255
Default Gateway . . . . . . . . . : 0.0.0.0
 


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