Ping from XP to Vista OK, but not from Vista to XP

[Pjerrot]

Hi,


I can ping my Vista Home Premium machine from my XP machine, but I can
not ping from the Vista machine to the XP machine.

What is wrong?

The network setup:

XP-machine
ipconfig:
ip = 192.168.15.100
sub=192.168.15.255
gateway=192.168.15.1
arp -a shows the ethernet mac-adresse for the Vista machine
Connection to internet: Yes
No security is setup regarding IPSec.

Vista-machine
ipconfig:
ip = 192.168.15.102
sub=192.168.15.255
gateway=192.168.15.1
Connection to internet: Yes
arp -a shows the ethernet mac-adresse for the XP machine and the
gateway, Linksys. Some strange ip-addresses pops up: 224.0.0.22.

I have an ADSL modem with a firewall, and behind that a Linksys
WRT54GP2. The Linksys serves as firewall, switch, IP-telephone and
WiFi access. Both machines are connected to a 5 port switch which is
conected to the Linksys switch. All connection with utp cat-5 cables
and RJ-45 plugs.

Firewalls are turned off in both machines. They use the shame
workgroup, they have different names.

On the XP I have analyzed the ethernet packet traffic:
The XP machine recieves an arp broadcast, which it responds on. The
arp works.

Please help, I can not see the problem.

Pjerrot

 

[Robert L. \(MS-MVP\)]

Are you use DHCP? Are you sure sub=192.168.15.255?

--
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com

 

[Mick Murphy]

http://technet.microsoft.com/en-us/library/bb727037.aspx

Have a read of the above link re Vista File and Printer Sharing.

Permissions/Share info is there as well.

If using Norton, McAfee, Trend Micro I.S., make sure file and printer
sharing is enabled in THEIR firewall.

1st thing to do is make sure that the Workgroup Name of ALL the computers is
the SAME.

In Vista Network and Sharing:

Network Discovery: ON (So it can see the other computers)

Network set to Private (Public is for hotspots, airports, etc)

File Sharing: ON

Public Folder Sharing: ON (Vista’s Public Folder is the same as XP’s Shared
Docs)

Password Protected: OFF (unless you want to set up identical usernames and
passwords on ALL computers in your Network) If you have it ON, you will be
asked for a username and password when you try to access a Vista computer
from an XP computer.

Also, run the XP’s Home Network File and Printer Sharing Wizard to include
Vista in your “New†Network, even if you had an XP Network set up prior to
adding a Vista computer to it.

 

[Pjerrot]

Hi,


The problem persist after I eliminated the 5 port switch from the
network.

Thank you for your responses, Robert and Mick!

To Mick:
I do not try to share the network. I am working on basic tcp/ip, which
have to be in order before any sharing. The page you refer to does not
mention the ip ping at all.

To Robert:
Regarding DHCP the machines use the DHCP server in the Linksys
WRT54GP2. And you are right in my mistake. The subnet maske is
255.255.255.0 on both machines. Thank you.

The network setup this morning (GMT+1):

I have an ADSL modem with a firewall, and behind that a Linksys
WRT54GP2.

The Linksys serves as firewall, 3 port switch, IP-telephone and WiFi
access point.

Both machines are connected to the Linksys switch. All connection with
UTP Cat-5 cables
and RJ-45 plugs.

The XP-machine is home build with an MSI KT3 Ultra 2 motherboard and
3COM ethernet pci card:
ipconfig:
ip = 192.168.15.100
sub=255.255.255.0
gateway=192.168.15.1

arp -a:
Shows the ethernet mac-adresse for the Vista machine

Connection to internet: Yes
No security is setup regarding IPSec.

The Vista-machine Dell Dimension E520
ipconfig:
ip = 192.168.15.102
sub=255.255.255.0
gateway=192.168.15.1

Connection to internet: Yes
arp -a:
shows the ethernet mac-adresse for the XP machine and the
gateway, Linksys. Some strange ip-addresses pops up: 224.0.0.22 and
239.255.255.250.

Microsoft software firewalls are turned off in both machines. They use
the same
workgroup. They have different computer names.

On the XP I have analyzed the ethernet packet traffic with ethereal a
winpcap:
The XP machine recieves an arp broadcast, which it responds. The arp
works in the ip-stack.

Both machines ping the Linksys router and google.com and other
internet accessible servers.

The Linksys local DHCP server is setup as follows:
Start IP-address: 192.168.15.100
Number of adresses: 50
Client lease time: 0 ( means one day)
DNS 1: 0.0.0.0
DNS 2: 0.0.0.0
DNS 3: 0.0.0.0
WINS 1: 0.0.0.0

DDNS: Disabled

MAC Clone Service: Disabled

NAT: Enabled

Dynamic Routing: Disabled

Static Routing: No entry configured

The security setup is:
No filters are active, all disabled.

Regards
Pjerrot

 

[Pjerrot]

The problem persist. I have tried to activate the firewall on the XP
machine. And set up the ICMP config, so all traffic was allowed. It
did not help.

Anyone experienced the same problem?

/Pjerrot

 

[Pjerrot]

Found interresting article on Microsoft support for Windows XP.

How to troubleshoot TCP/IP connectivity with Windows XP:
http://support.microsoft.com/kb/314067/en-us

/Pjerrot

 

[Pjerrot]

Problem identified and solution found:

I have installed a Cisco VPN Client on the WinXP. The VPN client has a
"Stateful Firewall", which were checked and thus on. This "&?*"
firewall prevented answers on ping to be send to other computers from
the WinXP machine.

Lessons learned:

1) Can you ping one way, but the other way, then the computer not
ansering to pings have an active firewall. The firewall can be hidden
or shown.

2) Check the installed Cisco VPN drivers setup.

/Pjerrot