Can only ping one direction!?

[sazrocks]

So I have a bit of an odd situation here. I have two subnets, 192.168.1.0/24 and 192.168.2.0/24. I have three clients that this involves,

192.168.1.2 (my win10 desktop),

192.168.1.90 (unraid server),

and 192.168.2.2 (debian server).

 

From 192.168.1.90 I can ping 192.168.1.2 and 192.168.2.2.

From 192.168.1.2 I can ping 192.168.1.90 and 192.168.2.2.

From 192.168.2.2 I can ping 192.168.1.90, but not 192.168.1.2.

 

So for some reason 192.168.1.2 can ping 192.168.2.2 but 192.168.2.2 can't ping 192.168.1.2

 

By can't ping I mean it just sits there until I ctrl-c to quit the process; there are no error messages. Below is an example.

REDACTED@debianServer:~$ ping 192.168.1.2
PING 192.168.1.2 (192.168.1.2) 56(84) bytes of data.
^C
--- 192.168.1.2 ping statistics ---
254 packets transmitted, 0 received, 100% packet loss, time 259050ms

Any ideas? Am I missing something stupid?

[Radium_Angel]

20 minutes ago, sazrocks said:

Any ideas?

Firewall and AV can sometimes interfere...

[sazrocks]

20 minutes ago, Radium_Angel said:

Firewall and AV can sometimes interfere...

How though? Packets can be sent in both directions and both respond to ping from a third client, so I don’t see how firewall could be an issue.

 

There is no AV installed.

[MangetsuNeko]

Windows Firewall will sometimes block ICMP packets from what it considers an outside network. Try disabling Windows Firewall temporarily to test this out.

[sazrocks]

14 minutes ago, MangetsuNeko said:

Windows Firewall will sometimes block ICMP packets from what it considers an outside network. Try disabling Windows Firewall temporarily to test this out.

That works! Thank you! How would I disable this ICMP filtering without disabling the firewall as a whole?

[MangetsuNeko]

It should be an Inbound setting I believe under File and Printer Sharing.

Give this a try:

1. Click Advanced Settings on the left.
2. From the left pane of the resulting window, click Inbound Rules.
3. In the right pane, find the rules titled File and Printer Sharing (Echo Request - ICMPv4-In).
4. Right-click each rule and choose Enable Rule.

Let me know if that works for you or not...

[MangetsuNeko]

4 minutes ago, sazrocks said:

That works! Thank you! How would I disable this ICMP filtering without disabling the firewall as a whole?

Try this command, too, if that is more your thing.

netsh advfirewall firewall add rule name="ICMP Allow incoming V4 echo request" protocol=icmpv4:8,any dir=in action=allow

[sazrocks]

4 minutes ago, MangetsuNeko said:

Try this command, too, if that is more your thing.

netsh advfirewall firewall add rule name="ICMP Allow incoming V4 echo request" protocol=icmpv4:8,any dir=in action=allow

Ran that, works now, than you!