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Internet Firewall

By KingOfTheNerds ·
Hi All,

I have an ISA server running, at the moment i don't seem to be able to open any ports on it. I have tried multiple port openings E.g. POP, SMTP, FTP, on outbound and inbound but still these ports remain closed.

I think it is because i have two instances of NAT running. Below is my current setup:

Internet > ADSL Router(using NAT) > 100MB NIC in Windows 2000 Server ISA Server on 10.0.0.1 range > Out through a 1Gb NIC on 192.168.1.* range>Managed switch>Network

The ISA Server is also running NAT.

I am confused on the setup and i am defintely sick to death of not being able to open ports.

Now listen closely, i am prepared to give all of these points to someone who can not just give me an answer, but help me through setting it up so that i can at least open a port such as FTP.

When i am able to open a port and access from a computer inside the network the points will be awarded.

Thankyou

P.S. No negative comments, these are my points and these are the condition

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by CG IT In reply to Internet Firewall

you create packet filters to open ports that you need. ISA server by default closes ALL ports until you allow them. There are wizards you can run to publish services like Email, Web Servers, Remote Access. Change the view your using if you don't see the Wizard Icons to create packet filters, Secure your network in the right pane.

Open up ISA server management console. Expand your server in the left pane. Expand Access Policies. Note there are three entries. you'll want filters. Here is where you create the filters to open up ports for your services. Note: ISA server does NOT allow "all users" access under rules. you MUST specify who is allowed e.g. a user group or user account. Also note, ISA server will conflict with IIS in listening on port 80. Therefore you must change the proxy to a port other than port 80 for HTTP requests. Internet explorer for clients must also be configured to user ISA server [proxy server] or they will get the standard denied request by ISA server.

Microsoft Help and Support along with isaserver.org have a multitude of step by step instructions on configuring ISA Server 2000.

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by CG IT In reply to

if you want or need more information post again and tell us what you have done to create rules and packet filters in ISA.

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by KingOfTheNerds In reply to

Poster rated this answer.

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by rindi1 In reply to Internet Firewall

Have a look at your ADSL Router. You can probably open/close ports there as well

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by KingOfTheNerds In reply to

Poster rated this answer.

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by EdLockett In reply to Internet Firewall

If you want to open ports you must first do so in your router's configuration. THEN you can open the required ports in the ISA server.

Hope this helps :-)

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by KingOfTheNerds In reply to

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by KingOfTheNerds In reply to Internet Firewall

One of the things i did was try to open port 21. I did this because we have a web page on the interenet that i need to upload things to. Currently i can only upload things from the ISA server.

Any computer i try and upload from in the network it replies the following:
Windows cannot access this folder. Make sure you have typed the name correctly and have permisson to access the folder and try again.

Details: The connection was reset by the server.

This is one message that i get. I have fiddled with settings etc and i have been able to get another message.

It says something about not have enough permissions to access the folder, as if the way i access the internet from a client inside the network does not have enough rights.

We use anonymous logins through ISA Server. We can't authenticate because we have alot of Macs on our network that also go through the ISA server and they have a Mac server which handles their usernames and passwords so intergrated authentication in ISA is out of the question.

I am really lost, i have followed a document explaining word for word how to open port 21 using ISA and it still didn't work. It had pictures and all.

What i need is someone to give me step by step instructions on opening a port and then i can tell you what happens when it doesn;t work.

I can assure you it won't work. I have no idea why. Please get me to perform some tests so you can get an idea of whats happening, i really need to work this out.

If i can open just one port that is closed, i will be fine to open any other ports. Help me do this and have the points.

Thankyou

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by KingOfTheNerds In reply to Internet Firewall

Here is some sites I have been to with easy instructions, with pictures and all. But i is still not working.

http://www.isaserver.org/tutorials/Microsoft_ISA_Server_Part_II__Firewall_Functions_Publishing_Policy_Rules.html

http://www.isaserver.org/tutorials/Microsoft_ISA_Server_Part_I__introduction_installation_configuration_Web_caching_and_Internet_access.html

Surely there is some guru out there that looks at opening a port on an ISA server as easy. If so it should be no problem helping me open a port.

Thanks

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by KingOfTheNerds In reply to Internet Firewall

I have added 2 custom packet filters for 25and 110 allowing biderectional communication on those ports. I chose any remote host for both to connect too.

I have a protocol rule that allows all traffic, all the time from anyone.

I hope you gurus have better luck figuring out whats wrong then me.

Maybe the problem is occuring when a request comes from a 192 range and goes to a 10 range.

Thanks

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