Load ipnat.sys at startup

  • Thread starter Thread starter Hector
  • Start date Start date
H

Hector

Hello all,

There is a subnetwork for which I'd like to use Microsoft's Internet
Connection Sharing (ICS) with a third-party firewall. Everything works
fine except for a little issue with IPNAT.SYS. I don't know how to
force it to load at startup. Currently, if the gateway computer has
been turned off, I have to manually turn off the third-party firewall,
open any external web page with some other computer in the subnetwork
(so that ipnat loads) and turn the firewall on again.

Does anybody some way to load ipnat.sys at startup? Another thing that
might help is some way to load ipnat from the gateway computer without
requesting a web page from another computer.

Any help will be appreciated.

Hector C.
 
Why do you not just config the third-party firewall to be active
only on the external interface but leave the internal interface
to which your machines look for ICS unaffected ? or, drill lots
of holes in the protection on the inward facing interface to let
http/https 80/443, dns 53, etc. in ?
 
Roger,

I did something like that ... I trusted (in the gateway) the MAC
address of the laptop, and I trusted ipnat.sys in the gateway.

Another piece of information is the event that occurs when I launch
say Internet Explorer in the laptop but ipnat.sys has not been loaded
in the gateway:

"The Network Address Translator (NAT) was unable to request an
operation of the kernel-mode translation module. This may indicate
misconfiguration, insufficient resources, or an internal error. The
data is the error code."

The above error happens when the firewall is working and ipnat.sys
tries to load. Then I would take down the whole firewall in the
gateway, launch internet explorer in the laptop, and launch the
firewall again in the gateway. Everything works fine from there until
the gateway is turned off.

Thanks for your answer,

Hector C.
 
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