Win98SE ICS and Sygate

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Date: Fri, 29 Jul 2005 22:56:46 -0500

I've got a home lan with 2pc's using win98se ICS via crossover cable
connecting the network cards of each machine.

The host machine has the adsl modem connected via USB

modem hardcoded to 192.168.1.1, it assigns the icshost 192.168.1.2

ICS host also gets 192.168.0.1 (as seen from the client machine)
ICS client gets 192.168.0.2 (this one is set manually so that some port-
forwarding from the host will have a consistent target)

for over a year the host has been running Zone Alarm free version and the
client has been running sygate personal free version

recently had trouble with ZA on host shutting down, it started a couple
weeks ago and has been getting worse. finally I had enough and decided to
uninstall ZA and put Sygate on the host.

It works fine, host and client can both see each other, the modem, and
access email, web, usnet... etc. Except for *ONE* thing.

The hitch is the client machine needs to run DynDNS Updater
(http://www.kana.webhop.com) (v2.1.0 build 61) and it cannot manage to
detect the WAN address or successfully update the dyndns address.

I tried a test, shutting down sygate on the host machine allows dyndns to
update. I've searched the sygate helpfiles and based on what I've found, i
created the set of rules quoted below in an effort to get this fixed.

I know that the obvious solution is to run the dyndns updater on the host,
but that option is just not available for other reasons.

I've tried just about all I can think of, including the first two rules in
this list which are a result of looking at the firwall log for blocked
traffic which happens at exactly the same time dyndns updater is trying to
do it's thing, but still no results.

====sygate advance rules===
Allow local ICMP
This rule will allow both incoming and outgoing traffic from/to IP
address(es) 192.168.1.1,192.168.0.1,192.168.0.2 on ICMP type 0,8. This
rule will be applied to all network interface cards.

allow local network
This rule will allow both incoming and outgoing traffic from/to IP
address(es) 192.168.1.1,192.168.0.1-192.168.0.255 on all ports and
protocols. This rule will be applied to all network interface cards.

Allow Windows Internet Sharing Driver
This rule will allow both incoming and outgoing traffic from/to all
hosts on all ports and protocols. This rule will be applied to all
network interface cards. The following applications will be affected in
this rule: Windows Internet Sharing Driver.

Allow Microsoft Internet Connection Sharing Manager
This rule will allow both incoming and outgoing traffic from/to all
hosts on all ports and protocols. This rule will be applied to all
network interface cards. The following applications will be affected in
this rule: Microsoft Internet Connection Sharing Manager

Allow NDIS Virtual Device
This rule will allow both incoming and outgoing traffic from/to all
hosts on all ports and protocols. This rule will be applied to all
network interface cards. The following applications will be affected in
this rule: NDIS Virtual Device (Version 4.0).

Allow NETBEUI Virtual Device
This rule will allow both incoming and outgoing traffic from/to all
hosts on all ports and protocols. This rule will be applied to all
network interface cards. The following applications will be affected in
this rule: NETBEUI Virtual Device (Version 4.0).

Allow Win32 Kernel
This rule will allow both incoming and outgoing traffic from/to all
hosts on all ports and protocols. This rule will be applied to all
network interface cards. The following applications will be affected in
this rule: Win32 Kernel core component.

Allow TCP 67-68
This rule will allow both incoming and outgoing traffic from/to all
hosts on TCP remote port(s) 67 to/from TCP local port(s) 68. This rule
will be applied to all network interface cards.

Allow UDP 67-68
This rule will allow both incoming and outgoing traffic from/to all
hosts on UDP remote port(s) 67 to/from UDP local port(s) 68. This rule
will be applied to all network interface cards.
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