Others Cannot access my computer

  Sandy15 09:17 12 Feb 06
Locked

I recently installed an internet connectionion via cable through a 2nd LAN card, since then other computers on my workgroup (one using Win XP Pro and another using Win 98 SE) cannot access my computer. Please Help

  mgmcc 10:17 12 Feb 06

I suspect that it is an IP addressing problem, but it would be necessary to know how they are "networked" and how the IP addresses are allocated. For example, if you previously had no internet involvement in the network and addresses were allocated manually, setting up "Internet Connection Sharing" in your "host" PC could result in there being IP addresses that prevent the PCs from communicating. Similarly, it could have introduced IP addresses that haven't been catered for in firewall software.

  Sandy15 15:34 15 Feb 06

The IP addresses used are as such :
My Network Connections > properties shows two connections a) Local Area Connection - The one that connects me to the other computers using IP address 192.168.0.21 and a subnet mask 255.255.255.0. The other computers on my network use the same IP addresses. b)Local Area Connection2 - The one that connects me to the net using IP address 172.16.2.174 , subnet mask 255.255.0.0 and default gateway 172.16.0.1. The 2nd Addresses are provided by my service provider whereas the internal network address are manually configured.
However, it is strange that I can easily access the other machines but they are unable to access me (Message - You do not have permission..... etc etc)

  keewaa 10:05 18 Feb 06

Do you share the internet connection with these other computers and if so, are they able to access the internet?

  Sandy15 08:48 19 Feb 06

No, I do not share my internet connection with others. Only File & Print Sharing is ebabled.

  keewaa 10:47 19 Feb 06

If you go to a command prompt (strat-run-cmd) and type IPCONFIG /ALL can you copy and paste here what you see.

  Sandy15 13:50 20 Feb 06

Here is what it shows :

Windows IP Configuration
Host Name . . . . . . . . . . . . : ss
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek RTL8139/810x Family Fast Eth
ernet NIC
Physical Address. . . . . . . . . : 00-13-D3-0C-53-5A
Dhcp Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.0.21
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :

Ethernet adapter Local Area Connection 2:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Silan SC92031 PCI Fast Ethernet Adap
ter
Physical Address. . . . . . . . . : 00-E0-20-10-52-30
Dhcp Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 172.16.2.174
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . : 172.16.0.1
DNS Servers . . . . . . . . . . . : 172.16.0.1
202.138.96.2
202.138.103.100

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