RE: Network utility tools

["Mark Tinka" <mtinka at africaonline.co.ug>]

This is an easy one - DOCUMENT! DOCUMENT! DOCUMENT!

Assign a client an IP address, and document in a database, spreadsheet or an
ordinary text file.

Also, if you have a bandwidth manager, that would be a good place to check,
as each IP address will be linked to a customer name, to ease
administration. 

In addition, bandwidth managers can prevent unauthorised access to your
network resources - by only "opening the pipe" for assigned IP addresses,
you can close off the unassigned IPs, so that if one of your stubborn and
adventurous clients assigns it without your consent, it will not get through
your bandwidth manager. Not very efficient, but one way to start.

Regards,

Mark Tinka - CCNA
Network Engineer
Africa Online Uganda
5th Floor, Commercial Plaza
7 Kampala Rd,
Tel:   +256-41-258143
Fax:   +256-41-258144
E-mail: mtinka at africaonline.co.ug
Web:     www.africaonline.co.ug
 

-----Original Message-----
From: owner-afnog at afnog.org [mailto:owner-afnog at afnog.org] On Behalf Of
Stephane Bortzmeyer
Sent: Tuesday, April 29, 2003 11:18 PM
To: pademmy at yahoo.com
Cc: afnog at afnog.org
Subject: Re: Network utility tools 


On Tuesday 29 April 2003, at 12 h 53, 
Paul Ademola Ajayi <ademolaajayi72 at yahoo.com> wrote:

> hello everyone pls I want to ask of you people what network utility 
> tools can one use to detect any spam message on a network and how to 
> control it by stoping such act.?

I use SpamAssassin <URL:http://www.spamassassin.org/> and am happy with it.

> And what network utility tools can I use to know the IP address on my 
> client system - let say their server with a global IP address i.e the 
> IP address I gave them. let assume I forget the IP address and I want 
> to  get the actual IP address on their server system from my end.?

It is not very clear. You are an Internet provider, you lend IP addresses to

customers and you forget them? If so, the best solution is to ask to the 
customer (and to hope they will not switch to a less forgetful provider).
But 
the IP addresses of your customers are probably available in many places.
DNS 
zone files are a good example. Describe your setup and the kind of services 
you provide and I will have other ideas.

> beside, how do I detect people that are u sing my service without my 
> knowledge
> may be just becos they have my network parameters one or the other i.e
sniffers 
> on my network? 

This question should be detailed. What sort of services do you provide? For
instance, if you provide dial-up access, knowing your "network parameters"
(phone number, typically, the rest being sent by PPP/IPCP) is not
sufficient: people will need the login and password.

Regarding sniffers, well, they are a fact of life. You can take precautions
to avoid them (locking the rooms) or to make them almost useless (SSH).






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