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From: Linea Recta on 12 Feb 2010 14:36
I have port forwarded several applications on my PC, which is connected by
wire to the router. The PC has a static internal IP address.

With my notebook I always log in thru wifi. Now I recently installed Skype
on the notebook and I had to forward a port for this. Does this mean that I
have to give the notebook a static IP aswell?

I'm planning to install Skype on the PC too, does this require an additional
rule?



--
regards,

|\ /|
| \/ |@rk
\../
\/os


From: Lem on 12 Feb 2010 16:01
Linea Recta wrote:
> I have port forwarded several applications on my PC, which is connected by
> wire to the router. The PC has a static internal IP address.
>
> With my notebook I always log in thru wifi. Now I recently installed Skype
> on the notebook and I had to forward a port for this. Does this mean that I
> have to give the notebook a static IP aswell?
>
> I'm planning to install Skype on the PC too, does this require an additional
> rule?
>
>
>

"Any PC whose port is being forwarded must have its DHCP client function
disabled and must have a new static IP address assigned to it because
its IP address may change when using the DHCP function."

One can probably get away with not assigning a static IP address to a
computer that is always on and always attached to the router (except,
perhaps, for brief intervals such as power outages and the like) because
such a computer will most likely continue to receive the same IP address
from the router's DHCP server, particularly if the computer re-connects
to the router before the next expiration of the IP address lease.
Furthermore, some DHCP servers use "automatic allocation" (sometimes
called DHCP reservation) in which an IP address is "permanently"
assigned to a particular computer (identified by its MAC address). See,
e.g., this thread:
http://forums.linksysbycisco.com/linksys/board/message?board.id=Wireless_Routers&thread.id=81638

OTOH, a computer that frequently is removed from the network, like a
notebook, could easily receive a different IP address each time it
connects to the router if the computer is set to obtain an IP address
automatically (assuming the router doesn't support DHCP reservation).
--
Lem

Apollo 11 - 40 years ago:
http://www.nasa.gov/mission_pages/apollo/40th/index.html
From: John Wunderlich on 12 Feb 2010 16:37
"Linea Recta" <mccm.vos(a)abc.invalid> wrote in
news:OliUnqBrKHA.3536(a)TK2MSFTNGP06.phx.gbl:

> I have port forwarded several applications on my PC, which is
> connected by wire to the router. The PC has a static internal IP
> address.
>
> With my notebook I always log in thru wifi. Now I recently
> installed Skype on the notebook and I had to forward a port for
> this. Does this mean that I have to give the notebook a static IP
> aswell?
>
> I'm planning to install Skype on the PC too, does this require an
> additional rule?
>
>
>

To be dependable, yes, you should assign a static IP.

However if the laptop moves around, this can be extremely inconvenient.
As Lem mentioned, the best solution is to purchase a router that has
the "DHCP Reservation" feature. (Also known as "Static DHCP
Assignment", "Static DHCP", "IP reservation", or "MAC/IP binding").
This allows your machine to still use DHCP for moving around but when
connecting to your home router, the router will always assign the same
IP address to that machine. Problem solved.

HTH,
John
From: smlunatick on 12 Feb 2010 16:57
On Feb 12, 7:36 pm, "Linea Recta" <mccm....(a)abc.invalid> wrote:
> I have port forwarded several applications on my PC, which is connected by
> wire to the router. The PC has a static internal IP address.
>
> With my notebook I always log in thru wifi. Now I recently installed Skype
> on the notebook and I had to forward a port for this. Does this mean that I
> have to give the notebook a static IP aswell?
>
> I'm planning to install Skype on the PC too, does this require an additional
> rule?
>
> --
> regards,
>
> |\  /|
> | \/ |@rk
>  \../
>   \/os

I have set up a few Skype set ups on different routers / network and
never requires a port forward rule. You are connecting to a Skype
"service" which then "re-directs" to your account / your destination
account.
From: Bernd on 12 Feb 2010 19:29


-------- Original-Nachricht --------

> I have port forwarded several applications on my PC, which is connected by
> wire to the router. The PC has a static internal IP address.
>
> With my notebook I always log in thru wifi. Now I recently installed Skype
> on the notebook and I had to forward a port for this. Does this mean that I
> have to give the notebook a static IP aswell?
>
> I'm planning to install Skype on the PC too, does this require an additional
> rule?
>
>
>
As I understand how Skype works from this article, port forwarding isn't
necessary for Skype

http://www.h-online.com/security/features/How-Skype-Co-get-round-firewalls-747197.html

Bernd

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