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I'll be glad if ccan manage to help me making my server my self, I have good knowledge at Linux and I use it as my desktop and I made many web-hosting linux and windows servers but my big challenge up to now is the network administration server that can control users bandwidth and offer the conditions in the question like &nbsp;merging more than one interface to double bandwidth speed - thank you
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Hi,<br />
<br />
You may have a look at the below solutions:<br />
<br />
1-Untangle &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <a href="http://www.untangle.com" rel="ugc">www.untangle.com</a><br />
2-SmoothWall &nbsp; &nbsp; &nbsp;<a href="http://www.smoothwall.net" rel="ugc">www.smoothwall.net</a><br />
<br />

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I've tested them both before they won't give me what I mentioned in the question 
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looks like I can't find what I need even here !<br />
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then there is no reason for being a subscriber
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where can I find a detailed step-by-step howto for making a linux gateway with the following features :<br />
1- internal pppoe network with freeradius authentication .<br />
2- dialup admin script to control users bandwidth and other things.<br />
3- the ability to &quot;merge&quot; more than 1interface (like 3 internet gateways from 3 different ISPs) into the same server so I double my server speed <br />
<br />
thank you for answer 
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where can I find a detailed step-by-step howto for making a linux gateway with the following features :
1- internal pppoe network with freeradius authentication .
2- dialup admin script to control users bandwidth and other things.
3- the ability to "merge" more than 1interface (like 3 internet gateways from 3 different ISPs) into the same server so I double my server speed 

thank you for answer 

making linux server

The variety of Linux distributions creates myriad issues relating to configuration and operations when computers are networked, not the least of which is the use of various network management applications, some of which are included with specific distributions, while others are standalone applications.

Linux Networking

Servers are computing devices that are similar to desktop computers in that they have the same basic components, but are significantly different in size, configuration and purpose. Servers are usually accessed over a network, and many run unattended, without a computer monitor, input device, audio hardware or USB interfaces. Many servers do not have a graphical user interface (GUI), and are configured and managed remotely. Servers typically include hardware redundancy such as dual power supplies, RAID disk systems, and ECC memory, along with extensive pre-boot memory testing and verification. Critical components might be hot swappable, and to guard against overheating, servers might have more powerful fans or use water cooling.

Server Hardware

Network Management involves issues that are independent of specific hardware or software, including email policies, upgrade planning, backup scheduling and working with managed service providers for Desktop-As-A-Service (DaaS), Software-As-A-Service (SaaS) and the like through the use of tools, coupled with manufacturer standards, best practice guidelines, policies and procedures plus all other relevant documentation. Network management also includes monitoring, alerting and reporting, management reporting, planning for device or service updates, the backup of configurations, the setting of key performance indicators and measures (KPIs/KPMs), associated service level agreements and problem records as part of the IT Service Management (ITSM) framework.