What does WOL do?

[churin]

What does WOL allow us to do? Can I turn on and off my PC at home from
other PC via the internet? If so then what preparation I need to make
with my PC and its periperal devices at home before I leave home?

 

[Hans-Georg Michna]

What does WOL allow us to do? Can I turn on and off my PC at home from
other PC via the internet? If so then what preparation I need to make
with my PC and its periperal devices at home before I leave home?

Churin,

generally yes, provided that you can get such a packet through
the router, if you use one.

More details at http://winhlp.com/WxWOL.htm .

Hans-Georg

 

[churin]

Churin,

generally yes, provided that you can get such a packet through
the router, if you use one.

More details at http://winhlp.com/WxWOL.htm .

Thanks for your response.

Suppose the WAN IP of the router is 123.456.789.012 and its
port-forwarding is set for TCP of 1234 to a local IP of the PC which I
want to turned on. Can I turn on the PC from the internet by typing the
following URL in the address bar of a browser and press Enter key?

http://123.456.789.012:1234

 

[Hans-Georg Michna]

Hans-Georg Michna wrote:

Suppose the WAN IP of the router is 123.456.789.012 and its
port-forwarding is set for TCP of 1234 to a local IP of the PC which I
want to turned on. Can I turn on the PC from the internet by typing the
following URL in the address bar of a browser and press Enter key?

http://123.456.789.012:1234

Churin,

no. As http://winhlp.com/WxWOL.htm already explains, a computer
that is not switched on does not have an IP address. Therefore a
packet to an IP address cannot be routed to that computer.

I would recommend again to read that web page. It explains
exactly what you want to know.

Hans-Georg

 

[churin]

Churin,

no. As http://winhlp.com/WxWOL.htm already explains, a computer
that is not switched on does not have an IP address. Therefore a
packet to an IP address cannot be routed to that computer.

I would recommend again to read that web page. It explains
exactly what you want to know.

I have read the article in the web page but I am not certain if I
understood correctly. The following is my understanding of what is said
under the heading of "Wake On LAN over the Internet":

The process advances in the steps as follows:

1. Send from the internet, "WOL packet" with a port # specified, to the
router.
2. The packet is port-forwarded to an internal broadcast address.
3. Then, broadcast packets are sent out into the LAN.
4. The target PC is turned on.

In order for this to work, the router is capable of recognizing the "WOL
packet".

Is my understanding as above correct?

 

[Hans-Georg Michna]

I have read the article in the web page but I am not certain if I
understood correctly. The following is my understanding of what is said
under the heading of "Wake On LAN over the Internet":

The process advances in the steps as follows:

1. Send from the internet, "WOL packet" with a port # specified, to the
router.
2. The packet is port-forwarded to an internal broadcast address.
3. Then, broadcast packets are sent out into the LAN.
4. The target PC is turned on.

In order for this to work, the router is capable of recognizing the "WOL
packet".

Is my understanding as above correct?

Churin,

yes, that's one possible way, but to my knowledge this doesn't
work with most routers. It seems that the router has to help a
little bit, and most routers don't do that. You have to try and
see if yours does it.

The other, more promising method is to find out whether your
router supports some method. My router, for example, does it via
a telnet command, as you have already read in
http://winhlp.com/WxWOL.htm .

Hans-Georg

 

[churin]

Churin,

yes, that's one possible way, but to my knowledge this doesn't
work with most routers. It seems that the router has to help a
little bit, and most routers don't do that. You have to try and
see if yours does it.

The other, more promising method is to find out whether your
router supports some method. My router, for example, does it via
a telnet command, as you have already read in
http://winhlp.com/WxWOL.htm .

I guess that I should ask router venders weather they have routers which
allow WOL control via the Internet.
Thank you for your help.