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Hi. First of all use your own DNS, not an outside. File, DNS and gateway are the same? Need more info on what equipment you are using. Why a port on proxy?
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Ok, I replaced 8.8.8.8, &nbsp;<br />
File DNS and gateway are different.<br />
now I have : (I did a mystake on the question)<br />
<br />
DNS server is from my ISP &nbsp;200.200.200.1<br />
gateway is from my ISP &nbsp;200.200.200.100<br />
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Proxy configuration : eth0 : 192.168.1.250/24, gateway : 192.168.1.1 DNS : none<br />
eth1 : 200.200.200.200/29, gateway : 200.200.200.100/29, DNS 1 : 200.200.200.1, DNS 2 : 200.200.200.2, &nbsp;port : 3128<br />
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File server : 192.168.1.1/24, gateway : 192.168.1.1 DNS : 192.168.1.1<br />
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I´m using this for workstation :<br />
IP 192.168.1.10/24, &nbsp;gateway 192.168.1.1, DNS 1 : 200.200.200.1, DNS 2 :200.200.200.2 on Internet explore i configure proxy as 192.168.1.250 &nbsp;port : 3128
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I have two network interfaces on the proxy server (UBUNTU).<br />
eth0 internal IP<br />
eth1 external IP<br />
I don´t have my own DNS, can I use my proxy as DNS ?
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Any DNS server needs to be able to resolve DNS using external servers, right up to DNS root servers.<br />
I can't see any reason why you can't use the Ubuntu device as a DNS server, but you have to install and configure the service.
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We tried to help and maybe we did....
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Whats the best configuration for workstations ? (IP´s just for sample)<br />
<br />
Proxy configuration : eth0 : 192.168.1.250/24, gateway : 192.168.1.1 DNS : none<br />
eth1 : 200.200.200.200/29, gateway : 200.200.200.1, DNS 1 : 200.200.200.1, DNS 2 : 8.8.8.8, &nbsp;port : 3128<br />
<br />
File server : 192.168.1.1/24, gateway : 192.168.1.1 DNS : 192.168.1.1<br />
<br />
I´m using this for workstation :<br />
IP 192.168.1.10/24, &nbsp;gateway 192.168.1.1, DNS 1 : 200.200.200.1, DNS 2 : 8.8.8.8 on Internet explore i configure proxy as 192.168.1.250 &nbsp;port : 3128<br />
<br />
But the internet is to slow. What I´m doing wrong ?
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Whats the best configuration for workstations ? (IP´s just for sample)

Proxy configuration : eth0 : 192.168.1.250/24, gateway : 192.168.1.1 DNS : none
eth1 : 200.200.200.200/29, gateway : 200.200.200.1, DNS 1 : 200.200.200.1, DNS 2 : 8.8.8.8,  port : 3128

File server : 192.168.1.1/24, gateway : 192.168.1.1 DNS : 192.168.1.1

I´m using this for workstation :
IP 192.168.1.10/24,  gateway 192.168.1.1, DNS 1 : 200.200.200.1, DNS 2 : 8.8.8.8 on Internet explore i configure proxy as 192.168.1.250  port : 3128

But the internet is to slow. What I´m doing wrong ?

network configuration with proxy

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.

Network Management

Network design and methodology, also known as network architecture, is the design of a communication network. It is a framework for the specification of a network's physical components and their functional organization and configuration, its operational principles and procedures, as well as data formats used in its operation. In telecommunication, the specification of a network architecture may also include a detailed description of products and services delivered via a communications network, as well as detailed rate and billing structures under which services are compensated.

Network Architecture

Network Operations includes asset management, help-desk supervision, security and user policies, infrastructure administration and anything else that affects the operation of your network. Discussions will include those of best practices in platforms, configurations, performance, security and accounting.