Member Avatar for djclem2323

I am unable to ping a laptop running XP Pro SP1. I have tried everything.
Verified that the built in firewall is not turned on. Other that that i have complete connectivity to the network, just no connectivity to the laptop.

Any ideas anyone??

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  • Latest Post Latest Post by CimmerianX

Dani AI

Generated

Given that the laptop can reach network resources but never replies to pings, the fault is most likely one of three zones: host-level filtering (ICMP dropped by Windows/AV/filter driver), layer‑2 problems (no ARP reply because of VLAN/port security/duplicate MAC), or an IP conflict. , and offered useful first steps; the checklist below assumes those basic steps were already tried and focuses on targeted diagnostics to pinpoint where the echo request is lost.

Run these collection commands to compare IP/MAC from both ends:

# On the XP laptop
ipconfig /all

# From another PC on the same subnet
arp -a
nbtstat -A <laptop-ip>

Interpretation guide:

  • If the MAC reported by ipconfig /all differs from the MAC shown by arp -a for that IP, a duplicate-IP or spoofed host exists.
  • If arp -a shows no entry for the laptop IP after a ping attempt, the laptop is not answering ARP (signs of VLAN/port-security or switch-level isolation).
  • If the MAC matches but pings still fail, capture traffic on the laptop (Wireshark). If ICMP Echo Request packets arrive but no Echo Reply is sent, the block is at the host (firewall/AV/filter driver/LSP). If requests do not arrive, the block is on the network.

Further diagnostic actions (in order):

  • Capture traffic on the laptop while pinging from another host to see whether requests arrive.
  • Boot the notebook to Safe Mode with Networking or from a Linux live USB to test ICMP outside the installed Windows environment.
  • Move the cable to a different switch port or directly connect the laptop to a known-good PC (static IPs) to rule out switch/VLAN/port-security.
  • Inspect the adapter properties list for third-party filter drivers and check DHCP server leases for conflicts.

Following this sequence narrows the fault to host, switch, or IP conflict and points to the appropriate fix (remove the filter driver or security suite, fix switch/VLAN or correct the IP conflict).

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Member Avatar for Sardukar

Little setup info needed. Wireless, Ethernet, what type of network. Also, laptop is able to access the network? Or no? If no, check for latest drivers, or uninstall the NIC in device manager and reboot. What OS are you trying to connect from? Same OS (XP) or 2000, etc? How is this setup, P2P, via Router, switch, hub, etc... let me know. Going to go workout now.

Member Avatar for djclem2323

Ethernet network. Laptop can access all resources on the network. I cannot ping the laptop fron any machine, XP, 2000, nt4 etc.....
Out of about 400 pcs this is the only not responding to ping.

Member Avatar for Sardukar

Try this to reset TCP/IP in XP:
Click Start -> Run -> CMD <Enter>
At the prompt type:
NETSH INT IP RESET C:\IPRESET.TXT
<Enter>
Restart the computer. If this doesnt work, uninstall TCP/IP from network protocols, restart, and then reinstall. Hope this helps. Also might be the winsock file at fault, this is a repair utility you can try:
http://members.shaw.ca/techcd/WinsockXPFix.exe

GL ;)

Member Avatar for rajkumar.rmr

I am unable to ping a laptop running XP Pro SP1. I have tried everything.
Verified that the built in firewall is not turned on. Other that that i have complete connectivity to the network, just no connectivity to the laptop.

Any ideas anyone??

Simply go to device manager and disable your LAN driver and enable it again, hope it works.

Regards
Rajkumar RM

Edited by rajkumar.rmr because: n/a
Member Avatar for CimmerianX

One obvious question, can this laptop ping any other network device?

Are there any other firewall/security suitess installed (i.e. symantec, mcafee, avast)?

Is tcpip the only protocol installed? Are you perhaps accessing resources using something else? (ips/spx)

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