All of a sudden.. two desktops cannot see each other. The two desktops can
see only the laptop.
Computers A, B, and C. B being the laptop.
A and C can ping B
But B, cannot ping A or C, nor can A ping C, or C to A.
All in the same workgroup. All firewalls shut off.

I am not sure if it is possible.. but can the installation of ACT on A cause
this problem?

I am thinking that an update was made on the two desktops and changed a
setting. I recall a registry change to a "zero" setting for a fix.. but this
may be for something else....

Any thoughts appreciated.

"Richard" <(E-Mail Removed)> wrote in message
news:EF708490-8ECE-47C8-BA9D-(E-Mail Removed)...
| All of a sudden.. two desktops cannot see each other. The two desktops
can
| see only the laptop.
| Computers A, B, and C. B being the laptop.
| A and C can ping B
| But B, cannot ping A or C, nor can A ping C, or C to A.
| All in the same workgroup. All firewalls shut off.

IP info for each machine? Any third party firewall/security installed?

IP addresses are 192.168.5.100 ,, 101,, 102
No third party security... just a plain virus scan... no firewall software.

"Calab" wrote:

>
> "Richard" <(E-Mail Removed)> wrote in message
> news:EF708490-8ECE-47C8-BA9D-(E-Mail Removed)...
> | All of a sudden.. two desktops cannot see each other. The two desktops
> can
> | see only the laptop.
> | Computers A, B, and C. B being the laptop.
> | A and C can ping B
> | But B, cannot ping A or C, nor can A ping C, or C to A.
> | All in the same workgroup. All firewalls shut off.
>
> IP info for each machine? Any third party firewall/security installed?
>
>
>

What about subnet mask and gateway? Can you ping 127.0.0.1 on all machines?

Those three IP's should be able to reach each other unless:
- They are not physically connected (bad switch, bad cables, etc)
- You have the subnet mask and gateway messed up, but considering the IP's
you are using, it would be hard to break it that bad.
- There is firewall software someplace blocking ICMP (and other protocols)
- You have the connections wrong on your router (one PC in the WAN port
instead of all being in LAN ports)


"Richard" <(E-Mail Removed)> wrote in message
news:67FDB54A-4906-4657-9C4F-(E-Mail Removed)...
| IP addresses are 192.168.5.100 ,, 101,, 102
| No third party security... just a plain virus scan... no firewall
software.
|
| "Calab" wrote:
|
| >
| > "Richard" <(E-Mail Removed)> wrote in message
| > news:EF708490-8ECE-47C8-BA9D-(E-Mail Removed)...
| > | All of a sudden.. two desktops cannot see each other. The two
desktops
| > can
| > | see only the laptop.
| > | Computers A, B, and C. B being the laptop.
| > | A and C can ping B
| > | But B, cannot ping A or C, nor can A ping C, or C to A.
| > | All in the same workgroup. All firewalls shut off.
| >
| > IP info for each machine? Any third party firewall/security installed?
| >
| >
| >

Yes.. can ping that address.
This was working for weeks.. then all of a sudden......
Is it possible ACT messed up the network settings in the registry?>

"Calab" wrote:

> What about subnet mask and gateway? Can you ping 127.0.0.1 on all machines?
>
> Those three IP's should be able to reach each other unless:
> - They are not physically connected (bad switch, bad cables, etc)
> - You have the subnet mask and gateway messed up, but considering the IP's
> you are using, it would be hard to break it that bad.
> - There is firewall software someplace blocking ICMP (and other protocols)
> - You have the connections wrong on your router (one PC in the WAN port
> instead of all being in LAN ports)
>
>
> "Richard" <(E-Mail Removed)> wrote in message
> news:67FDB54A-4906-4657-9C4F-(E-Mail Removed)...
> | IP addresses are 192.168.5.100 ,, 101,, 102
> | No third party security... just a plain virus scan... no firewall
> software.
> |
> | "Calab" wrote:
> |
> | >
> | > "Richard" <(E-Mail Removed)> wrote in message
> | > news:EF708490-8ECE-47C8-BA9D-(E-Mail Removed)...
> | > | All of a sudden.. two desktops cannot see each other. The two
> desktops
> | > can
> | > | see only the laptop.
> | > | Computers A, B, and C. B being the laptop.
> | > | A and C can ping B
> | > | But B, cannot ping A or C, nor can A ping C, or C to A.
> | > | All in the same workgroup. All firewalls shut off.
> | >
> | > IP info for each machine? Any third party firewall/security installed?
> | >
> | >
> | >
>
>
>

On 17 Apr, 02:55, Richard <Rich...@discussions.microsoft.com> wrote:
> Yes.. can ping that address.
> This was working for weeks.. then all of a sudden......
> Is it possible ACT messed up the network settings in the registry?>

What is ACT?


>
>
>
> "Calab" wrote:
> > What about subnet mask and gateway? Can you ping 127.0.0.1 on all machines?
>
> > Those three IP's should be able to reach each other unless:
> > *- They are not physically connected (bad switch, bad cables, etc)
> > *- You have the subnet mask and gateway messed up, but considering theIP's
> > you are using, it would be hard to break it that bad.
> > *- There is firewall software someplace blocking ICMP (and other protocols)
> > *- *You have the connections wrong on your router (one PC in the WANport
> > instead of all being in LAN ports)
>
> > "Richard" <Rich...@discussions.microsoft.com> wrote in message
> >news:67FDB54A-4906-4657-9C4F-(E-Mail Removed)...
> > | IP addresses are *192.168.5.100 ,, 101,, 102
> > | No third party security... just a plain virus scan... no firewall
> > software.
> > |
> > | "Calab" wrote:
> > |
> > | >
> > | > "Richard" <Rich...@discussions.microsoft.com> wrote in message
> > | >news:EF708490-8ECE-47C8-BA9D-(E-Mail Removed)...
> > | > | All of a sudden.. two desktops cannot see each other. *The two
> > desktops
> > | > can
> > | > | see only the laptop.
> > | > | Computers A, B, and C. *B being the laptop.
> > | > | A and C can ping B
> > | > | But B, cannot ping A or C, nor can A ping C, *or C to A.
> > | > | All in the same workgroup. *All firewalls shut off.
> > | >
> > | > IP info for each machine? Any third party firewall/security installed?
> > | >
> > | >
> > | >- Hide quoted text -
>
> - Show quoted text -