Cannot connect to Internet thro' host PC

Hi all

I have setup my PC and laptop as home network (with help from members of
this group - thanks).

All working OK except that I cannot access the Internet from the laptop.
Physical connection is by cross-over cable and I have WinXP on both
machines. The host Pc has a broadband connection.

Network connections on the laptop show as: 1. Broadband connection on Host
PC - Connected 2. Local Area connection - Enabled.

Not sure if both of these are needed or not!

Can anyone help please?

Thanks

Plato

> Hi all
>
> I have setup my PC and laptop as home network (with help from members of
> this group - thanks).
>
> All working OK except that I cannot access the Internet from the laptop.
> Physical connection is by cross-over cable and I have WinXP on both
> machines. The host Pc has a broadband connection.
>
> Network connections on the laptop show as: 1. Broadband connection on
Host
> PC - Connected 2. Local Area connection - Enabled.
>
> Not sure if both of these are needed or not!
>
> Can anyone help please?
>
> Thanks
>
> Plato

Is ICS installed on the host machine?


--
Graham.



%Profound_observation%

On Wed, 8 Dec 2004 22:49:20 -0000, Plato wrote:

> Hi all
>
> I have setup my PC and laptop as home network (with help from members of
> this group - thanks).
>
> All working OK except that I cannot access the Internet from the laptop.
> Physical connection is by cross-over cable and I have WinXP on both
> machines. The host Pc has a broadband connection.
>
> Network connections on the laptop show as: 1. Broadband connection on Host
> PC - Connected 2. Local Area connection - Enabled.
>
> Not sure if both of these are needed or not!
>
> Can anyone help please?
>
> Thanks
>
> Plato

If you have ICS on the host PC and you have a firewall then you'll need to
add your LAN subnet to the Trusted Zone and/or reduce the Trusted Zone
security level to Medium. Most free firewall don't support ICS correctly.

If that's not it, post again with details of what you are running on your
host PC.

Regards

Bill

Hi all

Thanks for your help. I do have a firewall - Zone Alarm Pro. I have put
my laptop connection in the Trusted Zone of the host PC and the broadband
connection is in the Internet Zone.

I suspect that from what you say ZAP is the problem as ICS is enabled on the
host PC. Not sure what you mean when you say LAN subnet - my laptop entry
in ZA shows the laptop IP adddress followed by /255.255.255.0 - is this what
you mean or even correct? Pinging that IP address from the host PC comes
up with an invalid IP address message. Pinging the host PC from the laptop
is OK. I note that in ZAP the IP address ends .0.0 but on the laptop it
ends .0.252. Pinging the latter from the host PC is OK.

In short I am totally confused!!

Any more help greatly appreciated.

Plato


"phoenix" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> On Wed, 8 Dec 2004 22:49:20 -0000, Plato wrote:
>
>> Hi all
>>
>> I have setup my PC and laptop as home network (with help from members of
>> this group - thanks).
>>
>> All working OK except that I cannot access the Internet from the laptop.
>> Physical connection is by cross-over cable and I have WinXP on both
>> machines. The host Pc has a broadband connection.
>>
>> Network connections on the laptop show as: 1. Broadband connection on
>> Host
>> PC - Connected 2. Local Area connection - Enabled.
>>
>> Not sure if both of these are needed or not!
>>
>> Can anyone help please?
>>
>> Thanks
>>
>> Plato
>
> If you have ICS on the host PC and you have a firewall then you'll need to
> add your LAN subnet to the Trusted Zone and/or reduce the Trusted Zone
> security level to Medium. Most free firewall don't support ICS correctly.
>
> If that's not it, post again with details of what you are running on your
> host PC.
>
> Regards
>
> Bill

On Thu, 9 Dec 2004 10:24:21 -0000, Plato wrote:

> Hi all
>
> Thanks for your help. I do have a firewall - Zone Alarm Pro. I have put
> my laptop connection in the Trusted Zone of the host PC and the broadband
> connection is in the Internet Zone.
>
> I suspect that from what you say ZAP is the problem as ICS is enabled on the
> host PC. Not sure what you mean when you say LAN subnet - my laptop entry
> in ZA shows the laptop IP adddress followed by /255.255.255.0 - is this what
> you mean or even correct? Pinging that IP address from the host PC comes
> up with an invalid IP address message. Pinging the host PC from the laptop
> is OK. I note that in ZAP the IP address ends .0.0 but on the laptop it
> ends .0.252. Pinging the latter from the host PC is OK.
>
> In short I am totally confused!!
>
> Any more help greatly appreciated.
>
> Plato
>
> snip

Ah, in that case you shouldn't have any problems with ICS - I was assuming
you had the free version.

OK, what you need to do is this: on the ICS host go to the Firewall/Main
tab and put your Internet Security back to High. Next go to the Advanced
button near the bottom of the page and click that, you should now see a
'Security' tab and on there is an option for Internet Connection Sharing,
just click the radio button 'This computer is an ICS/NAT gateway' and you
should see an IP address that is 192.168.0.1 - then click OK and close the
ZAP GUI. Now go to the client PC and go to the same setting but set it as a
Client of an ICS/NAT gateway, by default it should point to 192.168.0.1
that's correct.

That should solve your problem but I am concerned about the IP address
you're mentioning. Is the laptop getting it's IP & DNS 'dynamically'? If it
is the IP & mask should be 192.168.0.2/255.255.255.0 - ist that what it
show when you do an ipconfig in a command prompt? If you have given the
laptop a fixed IP address then 192.168.0.252 would be OK.

Your ICS host should have two NICs (or one and a USB I guess as you're on
ADSL) installed, one is connected to your broadband (the USB?)and has yopur
public IP address and the second connection will be to your laptop via the
x-over cable. Because you have ICS installed the second NIC will have an
IP address & mask of 192.168.0.1/255.255.255.0 - is that correct? If you
look in the Firewall/Zones tab of ZAP you should see a New Network in the
Trusted Zone with an address/mask of 192.168.0.0/255.255.255.0 - that just
means it recognises all IP addresses in the 192.168.0.x range.

Does that make sense so far and does it fix your problem?

Regards

Bill

Hi Bill

Thanks for the very detailed reply

I have been thro' ZAP on the host and set it up as you say. I didn't have
ZAP on the laptop (only Windows Firewall which I had disabled) . I now have
ZAP on both. The laptop ZAP is now setup as you say.

I don't know if the laptop is getting its IP address dynamically or not but
IPCONFIG gives:

Connection Specific DNS Suffix: mshome.net
IP Address: 192.168.0.252
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.0.1

Does this all help? I still cannot connect to the Internet with the laptop
so obviously some setting is wrong somewhere!!

Any help to sort this out much appreciated - obviously progress is being
made but I am not there yet!

Thanks

Plato


"phoenix" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> On Thu, 9 Dec 2004 10:24:21 -0000, Plato wrote:
>
>> Hi all
>>
>> Thanks for your help. I do have a firewall - Zone Alarm Pro. I have
>> put
>> my laptop connection in the Trusted Zone of the host PC and the broadband
>> connection is in the Internet Zone.
>>
>> I suspect that from what you say ZAP is the problem as ICS is enabled on
>> the
>> host PC. Not sure what you mean when you say LAN subnet - my laptop
>> entry
>> in ZA shows the laptop IP adddress followed by /255.255.255.0 - is this
>> what
>> you mean or even correct? Pinging that IP address from the host PC
>> comes
>> up with an invalid IP address message. Pinging the host PC from the
>> laptop
>> is OK. I note that in ZAP the IP address ends .0.0 but on the laptop it
>> ends .0.252. Pinging the latter from the host PC is OK.
>>
>> In short I am totally confused!!
>>
>> Any more help greatly appreciated.
>>
>> Plato
>>
>> snip
>
> Ah, in that case you shouldn't have any problems with ICS - I was assuming
> you had the free version.
>
> OK, what you need to do is this: on the ICS host go to the Firewall/Main
> tab and put your Internet Security back to High. Next go to the Advanced
> button near the bottom of the page and click that, you should now see a
> 'Security' tab and on there is an option for Internet Connection Sharing,
> just click the radio button 'This computer is an ICS/NAT gateway' and you
> should see an IP address that is 192.168.0.1 - then click OK and close the
> ZAP GUI. Now go to the client PC and go to the same setting but set it as
> a
> Client of an ICS/NAT gateway, by default it should point to 192.168.0.1
> that's correct.
>
> That should solve your problem but I am concerned about the IP address
> you're mentioning. Is the laptop getting it's IP & DNS 'dynamically'? If
> it
> is the IP & mask should be 192.168.0.2/255.255.255.0 - ist that what it
> show when you do an ipconfig in a command prompt? If you have given the
> laptop a fixed IP address then 192.168.0.252 would be OK.
>
> Your ICS host should have two NICs (or one and a USB I guess as you're on
> ADSL) installed, one is connected to your broadband (the USB?)and has
> yopur
> public IP address and the second connection will be to your laptop via the
> x-over cable. Because you have ICS installed the second NIC will have an
> IP address & mask of 192.168.0.1/255.255.255.0 - is that correct? If you
> look in the Firewall/Zones tab of ZAP you should see a New Network in the
> Trusted Zone with an address/mask of 192.168.0.0/255.255.255.0 - that just
> means it recognises all IP addresses in the 192.168.0.x range.
>
> Does that make sense so far and does it fix your problem?
>
> Regards
>
> Bill

On Thu, 9 Dec 2004 13:54:32 -0000, Plato wrote:

> Hi Bill
>
> Thanks for the very detailed reply
>
> I have been thro' ZAP on the host and set it up as you say. I didn't have
> ZAP on the laptop (only Windows Firewall which I had disabled) . I now have
> ZAP on both. The laptop ZAP is now setup as you say.
>
> I don't know if the laptop is getting its IP address dynamically or not but
> IPCONFIG gives:
>
> Connection Specific DNS Suffix: mshome.net
> IP Address: 192.168.0.252
> Subnet Mask: 255.255.255.0
> Default Gateway: 192.168.0.1
>
> Does this all help? I still cannot connect to the Internet with the laptop
> so obviously some setting is wrong somewhere!!
>
> Any help to sort this out much appreciated - obviously progress is being
> made but I am not there yet!
>
> Thanks
>
> Plato
>
> "phoenix" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
>> snip

Hi

There are a couple of things that /may/ cause this problem, I'd like to try
the easiest first.

Try deleting the rules databse for ZAP and let it get recreated. To do this
we'll do it on the laptop first, go to the Overview/Preferences tab and
uncheck the 'Load ZAP at startup' option you'll be safe behind ICS while
you do this. Reboot the laptop so it starts without ZAP running then go to
the \Internet Logs directory (it's under your \Windows directory) and
delete all the files in there (you should keep any *.txt log files you may
need). Next restart ZAP and check the 'Load ZAP at startup' option, you'll
have to authorise your programs again or put ZAP into learn mode. You can
do that by going to Program Control/Main tab and moving the slider to Low,
after a couple of days you can move it back to Med or High.

When you've done that on the laptop do the same thing on the ICS host,
again you'll be OK with ICS installed. See how you get on with that.

Regards

Bill

Hi Bill

Thanks again for your prompt reply. Alas, done all that and it makes no
difference. So I temporarily shut down ZAP on both machines and at last can
access the Internet from the laptop.

So, clearly ZAP is the problem.

Any more ideas?

Thanks

Plato


"phoenix" <(E-Mail Removed)> wrote in message
news:1o3fehsw597dj$.(E-Mail Removed)...
> On Thu, 9 Dec 2004 13:54:32 -0000, Plato wrote:
>
>> Hi Bill
>>
>> Thanks for the very detailed reply
>>
>> I have been thro' ZAP on the host and set it up as you say. I didn't
>> have
>> ZAP on the laptop (only Windows Firewall which I had disabled) . I now
>> have
>> ZAP on both. The laptop ZAP is now setup as you say.
>>
>> I don't know if the laptop is getting its IP address dynamically or not
>> but
>> IPCONFIG gives:
>>
>> Connection Specific DNS Suffix: mshome.net
>> IP Address: 192.168.0.252
>> Subnet Mask: 255.255.255.0
>> Default Gateway: 192.168.0.1
>>
>> Does this all help? I still cannot connect to the Internet with the
>> laptop
>> so obviously some setting is wrong somewhere!!
>>
>> Any help to sort this out much appreciated - obviously progress is being
>> made but I am not there yet!
>>
>> Thanks
>>
>> Plato
>>
>> "phoenix" <(E-Mail Removed)> wrote in message
>> news:(E-Mail Removed)...
>>> snip
>
> Hi
>
> There are a couple of things that /may/ cause this problem, I'd like to
> try
> the easiest first.
>
> Try deleting the rules databse for ZAP and let it get recreated. To do
> this
> we'll do it on the laptop first, go to the Overview/Preferences tab and
> uncheck the 'Load ZAP at startup' option you'll be safe behind ICS while
> you do this. Reboot the laptop so it starts without ZAP running then go to
> the \Internet Logs directory (it's under your \Windows directory) and
> delete all the files in there (you should keep any *.txt log files you may
> need). Next restart ZAP and check the 'Load ZAP at startup' option, you'll
> have to authorise your programs again or put ZAP into learn mode. You can
> do that by going to Program Control/Main tab and moving the slider to Low,
> after a couple of days you can move it back to Med or High.
>
> When you've done that on the laptop do the same thing on the ICS host,
> again you'll be OK with ICS installed. See how you get on with that.
>
> Regards
>
> Bill

On Thu, 9 Dec 2004 17:14:47 -0000, Plato wrote:

> Hi Bill
>
> Thanks again for your prompt reply. Alas, done all that and it makes no
> difference. So I temporarily shut down ZAP on both machines and at last can
> access the Internet from the laptop.
>
> So, clearly ZAP is the problem.
>
> Any more ideas?
>
> Thanks
>
> Plato
>
> snip

Yes, but I was hoping to avoid this.

I suggest you shutdown ZAP and disconnect your laptop from the ICS host
then remove ICS reboot the PC and enable ICS again. When you've done that
connect your laptop and reboot it. See is that helps, if it does then
restart ZAP on the ICS host and let me know if it still works. BTW, are you
running the current 5.5.062.004 of ZAP?

If that doesn't work I can go through some more steps with you but I won't
be able to do it until tomorrow afternoon. If you want to do that email the
results of your tests to bpye [at] phoenix-systems [dot] uk [dot] com
(change the obvious for a valid address).

Regards

Bill