Can't get to Intranet

Posted on 1999-01-20
Last Modified: 2010-04-25
We have an NT server running IIS4.0.
Whenever the macs type in the URL of an Intranet site, they immediately try and dial up to our external ISP to get to an Internet site rather than look at the NT Server first

All PC's can see the Intranet

URL being entered
Macs Running Mac OS 8.1
Somebody help! Please!
Question by:robinM
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Expert Comment

ID: 1540875
Sounds like a proxy issue with the browser.  Which browser are you using?  In Netscape, go in to the preferences menu item to advanced and the proxies.  In the DO NOT USE section, make sure you put the above IP address or the domain of the Infranet.
LVL 30

Expert Comment

ID: 1540876
uhhhh....that IP address is a poor choice for an intranet ip. 10.0.X.X is a registered ip address and so does in fact exist on the INTERNET. A better (and standard) ip scheme would be 192.168.x.x which has been specifically set aside for intranets. That may be part of your problem. Secondly it sounds like youve got the wrong router/dns server information set up on the macs. Theyre checking an external dns server for the dns of the local network to which it has to dial to get to.

Author Comment

ID: 1540877
I tried everything jrsjr suggested but to no avail.

Weed, how do I change the router/dns server information set up on the macs.  If PC's can see the Intranet, I'm pretty sure it's not the fact that we're using invalid Intranet IP Addresses.  
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LVL 10

Expert Comment

ID: 1540878
Use the control panel TCP/IP and change the connection from PPP to ethernet.
LVL 30

Expert Comment

ID: 1540879
You change that information in the TCP/IP controll panel. Now if and when you get the macs to finally see the intranet they will no longer be able to see any 10.0.x.x addresses on the INTERNET because they think those IP addresses exist solely on your intranet (which is what your PC server is telling them). Which is why we use the 192.168.x.x convention for LANs. I would highly suggest switching your network to the conventional addressing scheme as it will likely prevent some ugly "issues" in the future. BTW i just did a name scan on all the IP addresses between and on the internet (just to make sure) and they all come back as valid. This will definitely lead to issues when your computers are looking for 1 IP address that exists both on the internet and the intranet. One of them is going to be ignored and it may be the one you want.

Expert Comment

ID: 1540880
So I take it that the network you are on is on the intranet that you want to access.  Do you access the Internet through a firewall on the intranet or only dial-out through an ISP?

Author Comment

ID: 1540881
RBR, I worked that bit out late yesterday and I can know get the Macs to see the Intranet.  My problem know is that the mac users need to go and change their TCP/IP settings back to PPP for when they are online/picking up mail.  This clears all the settings used in the TCP/IP ethernet panel.  How do I get both of them running so, it checks the NT server for addresses first and then goes via the dial up PPP connection.
LVL 10

Accepted Solution

rbr earned 20 total points
ID: 1540882
Store 2 differnt configurations under the TCP/IP settings so the the User are able to change to configuration under the Menu FILE configuration. The MAC isn't able to handle to TCP/IP connection at the same time, sorry.

Expert Comment

ID: 1540883
You need
If you connect to the Internet via PPP but to the intranet via the local lan you need two IP addresses. (one for each)
needs 7.5.3 or higher
OT 1.1.1
and 68030 or higher
look at
Allows intranet and ppp connection together (and more)
Multiple IP addresses should be available in OT 2.0 but don't quote me on this.



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