Wake on LAN / Magic Packet broadcast doesnt work through PPTP
Active Directory, Administration, DHCP, DNS, Ethernet, Firewalls, Forensics, Incident response, Intrusion management, IPv4, Lotus Domino, Microsoft Windows, Network security, Network testing, Networking, Networking Equipment, Networking services, Security, TCP, UDP, VPN, Wireless
Hi, I have a network, where I want to use WOL from a remote PC. It works when I send a packet from inside the network (or on the server).
If I connect via PPTP from a remote windows XP PC, I can?t wake up the PC on the LAN. I suspect the broadcast packet doesn?t reach the LAN. The PPTP connection have IP 192.168.16.127/24, DNS + Wins 192.168.16.2, gtwy 192.168.16.127. I can ping and remote control the PC?s on the LAN.
Configuration: Internet, Router (Fixed IP), External NIC, Small business server 2000, Internal NIC.
Router (internal side) 192.168.1.1
External NIC 192.168.1.2/24, gtwy 192.168.1.1, DNS + Wins 192.168.16.2
Internal NIC 192.168.16.2/24 no default gtwy, DNS + Wins 192.168.16.2
Isa server Local Address Table 192.168.16.0 ? 255 (LAN) + 172.17.51.1 ? 172.17.51.4
No blocking packet filters
Everything works OK (except WOL via PPTP)
Any suggestions are welcome
Software/Hardware used:
Software/Hardware used:
ASKED:
October 12, 2004 2:10 PM
UPDATED:
October 13, 2004 5:25 PM
Answer Wiki:
http://www.astaro.org/showflat.php?Cat=&Number=35719&Main=35124
maybe coul help you
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Why are you using WOL? Turn it off and turn off monitor if you really need to save power.
have you tried Remote Desk Top-ing to a machine internally and sending the WOL command? You are right in thinking your packets are being dropped but any router will do that. You could have a script on an internal machine and then tell the script to run from the outside. I found a WOL vbs script somewhere on the net, there are usually useful things like this in the groups bit of google.
Thanks for replies.
If I connect to a remote desktop in the LAN, I can wake op the PCs I want. But the general idea was to keep the PC’s shut down, and only start them when necessary.
Maybe the PPTP tunnel filter broadcasts? Any suggestions?
I am sure you have some server internally that is always on. Why don’t you Terminal Services to it and then send the WOL signal?
The problem might be that you’re timing out when you connect remotely. Windows has to initialize. This will brin gthe NIC down and then up. I think you would need to do something in your remote login script to send a ping to the box in question to wake it up, put in a wait, and then connect to it. Or maybe, leave the box in stanby mode.
To really diagnose the problem, try to have the box alive already and connect to it remotely. See if the box is actually getting any traffic.