Can ping but cannot be pinged

At my company we have a notebook (Dell Precision 7510) with Windows 7, logged into domain that started acting strange.

It can ping others and access anything that it has to (remote, file shares, etc.) but when pinged from any other device it returns ping timeout.
Also network discovery is turned on but can discover only itself.
This problem is the same on LAN and wireless as well.
When pingig, the dnsname is resolved and shows the correct ip address. Pingig the ip address also results the same.

I know the internet is full of this topic, but I have tried most of the solutions and non of them worked. Also reinstalling Windows is always an option but I would like to figure out what went wrong here.

Already tried:

• sfc /scannow
• reinstalled lan driver (from dell support site)
• winsh netsock reset
• entered safe mode with networking - same result -> probably not software problem
• Windows firewall is turned off - from services as well. (same on all computers)
• checked ipconfig /all - default gateway and subnet masks are set fine
• deleted dhcp reservation and renewed IP
• arp -a -d
• checked for hidden drivers that may cause problems: set devmgr_show_nonpresent_devices=1
• compared running services to another notebook that works good, it looked ok
• re joined the notebook to the domain
• tried to tracert the notebook it did 30 timeout * hops

I will update my post after I try something new.
If you have any questions about the notebooks configuration, just leave a comment and I will update my question.

Every new ideas would be greatly appreciated!

1 Answer

We found the problem after some heavy troubleshooting.

Checkpoint vpn client caused the problem.
I was thinking of this, but dropped the idea because I tried safe mode.

After reinstalling it worked fine.

Lesson learned. Never trust your VPN client.