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The explicit web proxy also supports proxying FTP sessions from a web browser and proxy auto-config PAC to provide automatic proxy configurations for explicit web proxy users.

The explicit web and FTP proxies can be operating at the same time on the same or on different FortiGate interfaces. In most cases you would configure the explicit web proxy for users on a network by enabling the explicit web proxy on the FortiGate interface connected to that network.

If the FortiGate unit is operating in Transparent mode, users would configure their browsers to use a proxy server with the FortiGate management IP address. The web proxy receives web browser sessions to be proxied at FortiGate interfaces with the explicit web proxy enabled. The web proxy uses FortiGate routing to route sessions through the FortiGate unit to a destination interface.

Before a session leaves the exiting interface, the explicit web proxy changes the source addresses of the session packets to the IP address of the exiting interface. When the FortiGate unit is operating in Transparent mode the explicit web proxy changes the source addresses to the management IP address. You can configure the explicit web proxy to keep the original client IP address. See Preventing the explicit web proxy from changing source addresses. For more information about explicit web proxy sessions, see Explicit web proxy sessions and user limits.

To allow all explicit web proxy traffic to pass through the FortiGate unit you can set the explicit web proxy default firewall policy action to accept.

You can do this by keeping the default explicit web proxy security policy action to deny and then adding web-proxy security policies.

You can also change the explicit web proxy default security policy action to accept and add explicit web proxy security policies.

If you do this, sessions that match web-proxy security policies are processed according to the security policy settings. This configuration is not recommended and is not a best practice. The explicit web-proxy can accept VIP addresses for destination address. You cannot configure Traffic shaping for explicit web proxy traffic.

Web Proxy policies can only include firewall addresses not assigned to a FortiGate unit interface or with interface set to Any. On the web-based manager you must set the interface to Any. In the CLI you must unset the associated-interface. For more information, see Explicit web proxy authentication. To use the explicit web proxy, users must add the IP address of a FortiGate interface on which the explicit web proxy is enabled and the explicit web proxy port number default to the proxy configuration settings of their web browsers.

On FortiGate units that support it, you can also enable web caching for explicit web proxy sessions. For example, to create an explicit policy that only allows access to Fortinet. Select Create New to add an Authentication Rule and configure the rule as follows:. You can add multiple user identity policies to apply different authentication for different user groups and users and also apply different UTM and logging settings for different user groups.

You can change the User Authentication Options if required.

Proxy settings for VPN clients

In most cases you can accept the defaults. You can also enter the following command to enable the web proxy for FTP sessions in a web browser. The default explicit web proxy configuration has sec-default-action set to deny and requires you to add a security policy to allow access to the explicit web proxy. The source address for a web-proxy security policy cannot be assigned to a FortiGate interface. Explicit proxy firewall address types improve granularity over header matching for explicit web proxy policies.

These specifications cause the web browser to use a particular proxy server or to connect directly. To configure PAC for explicit web proxy users, you can use the port that PAC traffic from client web browsers use to connect to the explicit web proxy.

fortigate proxy options

You can edit the default PAC file from the web-based manager or use the following command to upload a custom PAC file:.Join us now! Forgot Your Password? Forgot your Username? Haven't received registration validation E-mail? User Control Panel Log out. Forums Posts Latest Posts. View More. Recent Blog Posts. Recent Photos. View More Photo Galleries. Unread PMs. Forum Themes Elegant Mobile.

Essentials Only Full Version. New Member. I have a 60E with a UTM license running 5. When I went to enable explicit proxy from feature select there was no option, it's not listed in any of the options. What am I missing? Any help is appreciated. Thanks in advance! Expert Member.

You will need to change to "Proxy-based" first before you can enable explicit proxy from the feature select. Can you give this a try?You can select Flow or Proxy Inspection Mode from the System Information dashboard widget to control your FortiGate's security profile inspection mode. Having control over flow and proxy mode is helpful if you want to be sure that only flow inspection mode is used and that proxy inspection mode is not used.

In most cases proxy mode is preferred because more security profile features are available and more configuration options for these individual features are available. Some implementations; however, may require all security profile scanning to only use flow mode. In this case, you can set your FortiGate to flow mode knowing that proxy mode inspection will not be used. Proxy mode is enabled by default and you change to flow mode by changing the Inspection Mode on the System Information dashboard widget.

When you select Flow-based you are reminded that all proxy mode profiles are converted to flow mode, removing any proxy settings. This includes Explicit Proxy firewall policies. The table below lists FortiOS security profile features and shows whether they are available in flow-based or proxy-based inspection modes.

From the GUI, you can only configure antivirus and web filter security profiles in proxy mode. From the CLI you can configure flow-based antivirus profiles, web filter profiles and DLP profiles and they will appear on the GUI and include their inspection mode setting. Also, flow-based profiles created when in flow mode are still available when you switch to proxy mode. In flow mode, antivirus and web filter profiles only include flow-mode features.

Web filtering and virus scanning is still done with the same engines and to the same accuracy, but some inspection options are limited or not available in flow mode.

Explicit proxy authentication

Application control, intrusion protection, and FortiClient profiles are not affected when switching between flow and proxy mode. In this case the appropriate session helper is used for example, the SIP session helper. Setting flow or proxy mode doesn't change the settings available from the CLI. However, when in flow mode you can't save security profiles that are set to proxy mode.

You can also add proxy-only security profiles to firewall policies from the CLI. This practice isn't recommended because the setting will not be visible from the GUI. The following tables list the antivirus and web filter profile options available in proxy and flow modes.

All Rights Reserved. Terms of Service Privacy Policy. Skip To Main Content.In this example, you will add explicit proxy with web caching to your wireless network.

All devices on the wireless network will be required to connect to the proxy at port before they can browse web pages on the Internet. WAN Optimization web caching is added to reduce the amount of Internet bandwidth used and improve web browsing performance. Watch the video. Open Internet Properties.

fortigate proxy options

Edit the wireless network. In WiFi network connection settings, edit the wireless network. Select Show advanced options, configure a Manual proxy and enter the proxy settings. Skip to content In this example, you will add explicit proxy with web caching to your wireless network. Watch the video 1. Turn on Web Cache. Configuring devices on the wireless network to use the web proxy To use the web proxy, all devices on the wireless network must be configured to use the explicit proxy server.

Android: In WiFi network connection settings, edit the wireless network. Results To confirm that the proxy is processing traffic, attempt to connect to the Internet from the wireless network using a device that has not been configured to connect to the proxy.

Access should be blocked. Configure the device to use the proxy. You should now be able to connect to the Internet. This site uses cookies. Some are essential to the operation of the site; others help us improve the user experience. By continuing to use the site, you consent to the use of these cookies. Accept Privacy policy. To use the web proxy, all devices on the wireless network must be configured to use the explicit proxy server.

To confirm that the proxy is processing traffic, attempt to connect to the Internet from the wireless network using a device that has not been configured to connect to the proxy.Any time a security profile that requires the use of a proxy is enabled the Proxy Options field will be displayed.

Certain inspections defined in security profiles require that the traffic be held in proxy while the inspection is carried out and so the Proxy Options are there to define the parameters of how the traffic will be processed and to what level the traffic will be processed. In the same way that there can be multiple security profiles of a single type there can also be a number of unique Proxy Option profiles so that as the requirements for a policy differ from one policy to the next you can also configure a different Proxy Option profile for each individual policy or you can use one profile repeatedly.

Just like other components of the FortiGate, there is the option for different Proxy Option profiles so that you can be very granular in your control of the workings of the FortiGate. In the case of the Proxy Option profiles the thing that you will want to focus on is the matching up of the correct profile to a firewall policy that is using the appropriate protocols. You do not need or want to configure the HTTP components.

This setting is for those that would like to log the occurrence of oversized files being processed. It does not change how they are processed it only enables the FortiGate unit to log that they were either blocked or allowed through. A common practice is to allow larger files through without antivirus processing. This allows you to get an idea of how often this happens and decide on whether or not to alter the settings relating to the treatment of oversized files.

While each of the protocols listed has a default TCP port that is commonly used, the level of granularity of control on the FortiGate firewall allows that the port used by the protocols can be individually modified in each separate Profile. It can also be set to inspect any port with flowing traffic for that particular protocol. The headers of the packets will indicate which protocol generated the packet. To optimize the resources of the unit the mapping and inspection of protocols can be enabled or disabled depending on your requirements.

When proxy-based antivirus scanning is enabled, the FortiGate unit buffers files as they are downloaded. Once the entire file is captured, the FortiGate unit begins scanning the file. During the buffering and scanning procedure, the user must wait. After the scan is completed, if no infection is found, the file is sent to the next step in the process flow. If the file is a large one this part of the process can take some time. In some cases enough time that some users may get impatient and cancel the download.

This slow transfer rate continues until the antivirus scan is complete. Once the file has been successfully scanned without any indication of viruses the transfer will proceed at full speed.

fortigate proxy options

The client does not receive any notification of what happened because the download to the client had already started. Instead, the download stops and the user is left with a partially downloaded file. If the user tries to download the same file again within a short period of time, the cached URL is matched and the download is blocked. The client receives the Infection cache message replacement message as a notification that the download has been blocked.

Proxy settings on Forticlient

The number of URLs in the cache is limited by the size of the cache. This is another feature that is related to antivirus scanning.

The FortiGate unit has a finite amount of resources that can be used to buffer and scan a file. If a large file such as an ISO image or video file was to be downloaded this could not only overwhelm the memory of the FortiGate, especially if there were other large files being downloaded at the same time, but could exceed it as well.Any time a security profile that requires the use of a proxy is enabled the Proxy Options field will be displayed.

Certain inspections defined in security profiles require that the traffic be held in proxy while the inspection is carried out and so the Proxy Options are there to define the parameters of how the traffic will be processed and to what level the traffic will be processed. In the same way that there can be multiple security profiles of a single type there can also be a number of unique Proxy Option profiles so that as the requirements for a policy differ from one policy to the next you can also configure a different Proxy Option profile for each individual policy or you can use one profile repeatedly.

Just like other components of the FortiGate, there is the option for different Proxy Option profiles so that you can be very granular in your control of the workings of the FortiGate.

In the case of the Proxy Option profiles the thing that you will want to focus on is the matching up of the correct profile to a firewall policy that is using the appropriate protocols.

You do not need or want to configure the HTTP components. This setting is for those that would like to log the occurrence of oversized files being processed. It does not change how they are processed it only enables the FortiGate unit to log that they were either blocked or allowed through. A common practice is to allow larger files through without antivirus processing.

This allows you to get an idea of how often this happens and decide on whether or not to alter the settings relating to the treatment of oversized files. While each of the protocols listed has a default TCP port that is commonly used, the level of granularity of control on the FortiGate firewall allows that the port used by the protocols can be individually modified in each separate Profile.

It can also be set to inspect any port with flowing traffic for that particular protocol. The headers of the packets will indicate which protocol generated the packet. To optimize the resources of the unit the mapping and inspection of protocols can be enabled or disabled depending on your requirements. When proxy-based antivirus scanning is enabled, the FortiGate unit buffers files as they are downloaded. Once the entire file is captured, the FortiGate unit begins scanning the file. During the buffering and scanning procedure, the user must wait.

After the scan is completed, if no infection is found, the file is sent to the next step in the process flow. If the file is a large one this part of the process can take some time. In some cases enough time that some users may get impatient and cancel the download. This slow transfer rate continues until the antivirus scan is complete. Once the file has been successfully scanned without any indication of viruses the transfer will proceed at full speed.FortiGate supports multiple authentication methods.

This topic explains using an external authentication server with Kerberos as the primary and NTLM as the fallback. For successful authorization, the FortiGate checks if user belongs to one of the groups that is permitted in the security policy. Explicit proxy authentication is managed by authentication schemes and rules. An authentication scheme must be created first, and then the authentication rule. Log in using a domain and system that would be authenticated using the Kerberos server, then enter the diagnose wad user list CLI command to verify:.

Explicit proxy authentication FortiGate supports multiple authentication methods. To configure Explicit Proxy with authentication: Enable and configure the explicit proxy. Configure the authentication server and create user groups.

Create an authentication scheme and rules. Create an explicit proxy policy and assign a user group to the policy. Verify the configuration. Enable Explicit Web Proxy. Configure the remaining settings as needed. Click Apply.

fortigate proxy options

To enable and configure explicit web proxy in the CLI: config web-proxy explicit set status enable set ftp-over-http enable set socks enable set http-incoming-port set ipv6-status enable set unknown-http-version best-effort end config system interface edit "port2" set vdom "vdom1" set ip Click Create New.

Set the following: Name ldap-kerberos Server IP This option is only available in the CLI. Click OK. In the Remote Groups table, click Addand set the Remote Server to the previously created ldap-kerberos server. To configure an authentication server and create user groups in the CLI: Configure Kerberos authentication: config user ldap edit "ldap-kerberos" set server " Enable Authentication Schemeand select the just created Auth-scheme-Negotiate scheme.

To create an explicit proxy policy and assign a user group to it in the CLI: config firewall proxy-policy edit 1 set uuid baaeb-cd set proxy explicit-web set dstintf "port1" set srcaddr "all" set dstaddr "all" set service "web" set action accept set schedule "always" set logtraffic all set groups "NTLM-FSSO-Group" "Ldap-Group" set av-profile "av" set ssl-ssh-profile "deep-custom" next end Verify the configuration Log in using a domain and system that would be authenticated using the Kerberos server, then enter the diagnose wad user list CLI command to verify: diagnose wad user list ID: 8, IP: Server IP.

Server Port. Common Name Identifier.

Fortigate - How to troubleshoot Explicit Proxy (Browser setting) 5.6

Distinguished Name.