Category Archives: FortiGate

CLI Scripts

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CLI Scripts

To upload bulk CLI commands and scripts, go to System > Config > Advanced.

Scripts are text files containing CLI command sequences. Scripts can be used to deploy identical configurations to many devices. For example, if all of your devices use identical security policies, you can enter the commands required to create the security policies in a script, and then deploy the script to all the devices which should use those same settings.

Use a text editor such as Notepad or other application that creates simple text files. Enter the commands in sequence, with each line as one command, similar to examples throughout the FortiOS documentation set.

If you are using a FortiGate unit that is not remotely managed by a FortiManager unit or the FortiGuard Analysis and Management Service, the scripts you upload are executed and discarded. If you want to execute a script more than once, you must keep a copy on your management PC.

If your FortiGate unit is configured to use a FortiManager unit, you can upload your scripts to the FortiManager unit, and run them from any FortiGate unit configured to use the FortiManager unit. If you upload a script directly to a FortiGate unit, it is executed and discarded.

If your FortiGate unit is configured to use FortiGuard Analysis and Management Service, scripts you upload are executed and stored. You can run uploaded scripts from any FortiGate unit configured with your FortiGuard Analysis and Management Service account. The uploaded script files appear on the FortiGuard Analysis and Management Service portal web site.

 

Uploading script files

After you have created a script file, you can then upload it through System > Config > Advanced. When a script is uploaded, it is automatically executed.

Commands that require the FortiGate unit to reboot when entered in the command line will also force a reboot if included in a script.

 

To execute a script

1. Go to System > Config > Advanced.

2. Verify that Upload Bulk CLI Command File is selected.

3. Select Browse to locate the script file.

4. Select Apply.

If the FortiGate unit is not configured for remote management, or if it is configured to use a FortiManager unit, uploaded scripts are discarded after execution. Save script files to your management PC if you want to execute them again later.

If the FortiGate unit is configured to use the FortiGuard Analysis and Management Service, the script file is saved to the remote server for later reuse. You can view the script or run it from the FortiGuard Analysis and Management Service portal web site.

Disk

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Disk

To view the status and storage information of the local disk on your FortiGate unit, go to System > Config > Advanced. The Disk menu appears only on FortiGate units with an internal hard or flash disk.

 

Formatting the disk

The internal disk of the FortiGate unit (if available) can be formatted by going to System > Config > Advanced and selecting Format.

Formatting the disk will erase all data on it, including databases for antivirus and IPS; logs, quarantine files, and WAN optimization caches. The FortiGate unit requires a reboot once the disk has been formatted.

 

Setting space quotas

If the FortiGate unit has an internal hard or flash disk, you can allocate the space on the disk for specific logging and archiving, and WAN optimization. By default, the space is used on an as required basis. As such, a disk can fill up with basic disk logging, leaving less potential space for quarantine.

By going to System > Config > Advanced, you can select the Edit icon for Logging and Archiving and WAN Optimization & Web Cache and define the amount of space each log, archive and WAN optimization has on the disk.

Replacement messages list

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Replacement messages list

The replacement message list in System > Config > Replacement Messages.

The replacement messages list enables you to view and customize replacement messages. Use the expand arrow beside each type to display the replacement messages for that category. Select the Edit icon beside each replacement message to customize that message for your requirements.

Should you make a major error to the code, you can select the Restore Default to return to the original message and code base.

If you are viewing the replacement messages list in a VDOM, any messages that have been customized for that VDOM are displayed with a Reset icon that you can use to reset the replacement message to the global version.

For connections requiring authentication, the FortiGate unit uses HTTP to send an authentication disclaimer page for the user to accept before a security policy is in effect. Therefore, the user must initiate HTTP traffic first in order to trigger the authentication disclaimer page. Once the disclaimer is accepted, the user can send whatever traffic is allowed by the security policy.

 

Replacement message images

You can add images to replacement messages to:

  • Disclaimer pages
  • Login pages
  • Declined disclaimer pages
  • Login failed page
  • Login challenge pages
  • Keepalive pages

Image embedding is also available to the endpoint NAC download portal and recommendation portal replacement messages, as well as HTTP replacement messages.

Supported image formats are GIF, JPEG, TIFF and PNG. The maximum file size supported is 6000 bytes.

 

Adding images to replacement messages

 

To upload an image for use in a message

1. Go to System > Config > Replacement Messages.

2. Select Manage Images at the top of the page.

3. Select Create New.

4. Enter a Name for the image.

5. Select the Content Type.

6. Select Browse to locate the file and select OK.

The image that you include in a replacement message, must have the following html:

<img src=%%IMAGE: <config_image_name>%% size=<bytes> >

 

For example:

<img src=%%IMAGE: logo_hq%% size=4272>

 

Modifying replacement messages

Replacement messages can be modified to include a message or content that suits your organization.

Use the expand arrows to view the replacement message list for a given category. Messages are in HTML format. To change a replacement message, go to System > Config > Replacement Messages select the replacement message that you want to modify. At the bottom pane of the window, you can see the message on one side and the HTML code on the other side. The message view changes in real-time as you change the content.

A list of common replacement messages appears in the main window. To see the entire list and all categories of replacement messages, in the upper-right corner of the window, select Extended View.

 

Alert Mail replacement messages

The FortiGate unit adds the alert mail replacement messages listed in the following table to alert email messages sent to administrators. If you enable the option Send alert email for logs based on severity, whether or not replacement messages are sent by alert email depends on how you set the alert email in Minimum log level.

 

Authentication replacement messages

The FortiGate unit uses the text of the authentication replacement messages for various user authentication HTML pages that are displayed when a user is required to authenticate because a security policy includes at least one identity-based policy that requires firewall users to authenticate.

These replacement message pages are for authentication using HTTP and HTTPS. You cannot customize the firewall authentication messages for FTP and Telnet.

The authentication login page and the authentication disclaimer include replacement tags and controls not found on other replacement messages.

Users see the authentication login page when they use a VPN or a security policy that requires authentication. You can customize this page in the same way as you modify other replacement messages.

There are some unique requirements for these replacement messages:

  • The login page must be an HTML page containing a form with ACTION=”/” and METHOD=”POST”
  • The form must contain the following hidden controls:
  • <INPUT TYPE=”hidden” NAME=”%%MAGICID%%” VALUE=”%%MAGICVAL%%”> l  <INPUT TYPE=”hidden” NAME=”%%STATEID%%” VALUE=”%%STATEVAL%%”> l  <INPUT TYPE=”hidden” NAME=”%%REDIRID%%” VALUE=”%%PROTURI%%”>
  • The form must contain the following visible controls:
  • <INPUT TYPE=”text” NAME=”%%USERNAMEID%%” size=25>
  • <INPUT TYPE=”password” NAME=”%%PASSWORDID%%” size=25>

 

Example

The following is an example of a simple authentication page that meets the requirements listed above.

 

<HTML><HEAD><TITLE>Firewall Authentication</TITLE></HEAD>

<BODY><H4>You must authenticate to use this service.</H4>

<FORM ACTION=”/” method=”post”>

<INPUT NAME=”%%MAGICID%%” VALUE=”%%MAGICVAL%%” TYPE=”hidden”>

<TABLE ALIGN=”center” BGCOLOR=”#00cccc” BORDER=”0″ CELLPADDING=”15″ CELLSPACING=”0″ WIDTH=”320″><TBODY>

<TR><TH>Username:</TH>

<TD><INPUT NAME=”%%USERNAMEID%%” SIZE=”25″ TYPE=”text”> </TD></TR>

<TR><TH>Password:</TH>

<TD><INPUT NAME=”%%PASSWORDID%%” SIZE=”25″ TYPE=”password”> </TD></TR>

<TR><TD COLSPAN=”2″ ALIGN=”center” BGCOLOR=”#00cccc”>

<INPUT NAME=”%%STATEID%%” VALUE=”%%STATEVAL%%” TYPE=”hidden”>

<INPUT NAME=”%%REDIRID%%” VALUE=”%%PROTURI%%” TYPE=”hidden”>

<INPUT VALUE=”Continue” TYPE=”submit”> </TD></TR>

</TBODY></TABLE></FORM></BODY></HTML>

 

Captive Portal Default replacement messages

The Captive Portal Default replacement messages are used for wireless authentication only. You must have a VAP interface with the security set as captive portal to trigger these replacement messages.

 

Device Detection Portal replacement message

The FortiGate unit displays the replacement message when the FortiGate unit cannot determine the type of BYOD or handheld device is used to connect the network.

 

Email replacement messages

The FortiGate unit sends the mail replacement messages to email clients using IMAP, POP3, or SMTP when an event occurs such as antivirus blocking a file attached to an email that contains a virus. Email replacement messages are text messages.

If the FortiGate unit supports SSL content scanning and inspection these replacement messages can also be added to IMAPS, POP3S, and SMTPS email messages.

 

Endpoint Control replacement message

The FortiGate unit displays the replacement message when the FortiClient Endpoint Security software is not installed or registered correctly with the FortiGate unit.

 

FTP replacement messages

The FortiGate unit sends the FTP replacement messages listed in the table below to FTP clients when an event occurs such as antivirus blocking a file that contains a virus in an FTP session. FTP replacement messages are text messages.

 

FortiGuard Web Filtering replacement messages

The FortiGate unit sends the FortiGuard Web Filtering replacement messages listed in the table to web browsers using the HTTP protocol when FortiGuard web filtering blocks a URL, provides details about blocked HTTP 4xx and 5xx errors, and for FortiGuard overrides. FortiGuard Web Filtering replacement messages are HTTP pages.

If the FortiGate unit supports SSL content scanning and inspection and if Protocol Recognition > HTTPS Content Filtering Mode is set to Deep Scan in the antivirus profile, these replacement messages can also replace web pages downloaded using the HTTPS protocol.

 

HTTP replacement messages

The FortiGate unit sends the HTTP replacement messages listed in the following table to web browsers using the HTTP protocol when an event occurs such as antivirus blocking a file that contains a virus in an HTTP session. HTTP replacement messages are HTML pages.

If the FortiGate unit supports SSL content scanning and inspection, and if under HTTPS in the protocol option list has Enable Deep Scan enabled, these replacement messages can also replace web pages downloaded using the HTTPS protocol.

 

IM replacement messages

The FortiGate unit sends the IM replacement messages listed in to IM clients using AIM, ICQ, MSN, or Yahoo! Messenger when an event occurs such as antivirus blocking a file attached to an email that contains a virus. IM replacement messages are text messages.

 

NNTP replacement messages

The FortiGate unit sends the NNTP replacement messages listed in the following table to NNTP clients when an event occurs such as antivirus blocking a file attached to an NNTP message that contains a virus. NNTP replacement messages are text messages.

 

Spam replacement messages

The FortiGate unit adds the Spam replacement messages listed in the following table to SMTP server responses if the email message is identified as spam and the spam action is discard. If the FortiGate unit supports SSL content scanning and inspection these replacement messages can also be added to SMTPS server responses.

 

NAC quarantine replacement messages

The page that is displayed for the user depends on whether NAC quarantine blocked the user because a virus was found, a DoS sensor detected an attack, an IPS sensor detected an attack, or a DLP rule with action set to Quarantine IP address or Quarantine Interface matched a session from the user.

The default messages inform the user of why they are seeing this page and recommend they contact the system administrator. You can customize the pages as required, for example to include an email address or other contact information or if applicable a note about how long the user can expect to be blocked.

 

SSL VPN replacement message

The SSL VPN login replacement message is an HTML replacement message that formats the FortiGate SSL VPN portal login page. You can customize this replacement message according to your organization’s needs. The page is linked to FortiGate functionality and you must construct it according to the following guidelines to ensure that it will work.

  • The login page must be an HTML page containing a form with ACTION=”%%SSL_ACT%%” and METHOD=”%%SSL_METHOD%%”
  • The form must contain the %%SSL_LOGIN%% tag to provide the login form.
  • The form must contain the %%SSL_HIDDEN%% tag.

 

Web Proxy replacement messages

The FortiGate unit sends Web Proxy replacement messages listed in the table below when a web proxy event occurs that is detected and matches the web proxy configuration. These replacement messages are web pages that appear within your web browser.

The following web proxy replacement messages require an identity-based security policy so that the web proxy is successful. You can also enable FTP-over-HTTP by selecting the FTP option in System > Network > Explicit Proxy.

 

Traffic quota control replacement messages

When user traffic is going through the FortiGate unit and it is blocked by traffic shaping quota controls, users see the Traffic shaper block message or the Per IP traffic shaper block message when they attempt to connect through the FortiGate unit using HTTP.

The traffic quota HTTP pages should contain the %%QUOTA_INFO%% tag to display information about the traffic shaping quota setting that is blocking the user.

 

MM1 replacement messages

MM1 replacement messages are sent when, during MMS content scanning, FortiOS Carrier detects, for example a virus, using the MMS profile.

You must have Remove Blocked selected within the MMS profile if you want to remove the content that is intercepted during MMS scanning on the FortiGate unit.

 

MM3 replacement messages

MM3 replacement messages are sent when, during MMS content scanning, FortiOS Carrier detects, for example a virus, using the MMS profile.

You must have Remove Blocked selected within the MMS profile if you want to remove the content that is intercepted during MMS scanning on the unit.

 

MM4 replacement messages

MM4 replacement messages are sent when, during MMS content scanning, FortiOS Carrier detects, for example a virus, using the MMS profile.

 

MM7 replacement messages

MM7 replacement messages are sent when, during MMS content scanning, FortiOS Carrier detects, for example a virus, using the MMS profile.

 

MMS replacement messages

The MMS replacement message is sent when a section of an MMS message has been replaced because it contains a blocked file. This replacement message is in HTML format.

 

The message text is:

<HTML><BODY>This section of the message has been replaced because it contained a blocked file</BODY></HTML>

 

Replacement message groups

Replacement message groups enable you to view common messages in groups for large carriers. Message groups can be configured by going to Config > Replacement Message Group.

Using the defined groups, you can manage specific replacement messages from a single location, rather than searching through the entire replacement message list.

If you enable virtual domains (VDOMs) on the FortiGate unit, replacement message groups are configured separately for each virtual domain. Each virtual domain has its own default replacement message group, configured from System > Config > Replacement Messages Group.

When you modify a message in a replacement message group, a Reset icon appears beside the message in the group. You can select this Reset icon to reset the message in the replacement message group to the default version.

All MM1/4/7 notification messages for FortiOS Carrier (and MM1 retrieve-conf messages) can contain a SMIL layer and all MM4 notification messages can contain an HTML layer in the message. These layers can be used to brand messages by using logos uploaded to the FortiGate unit via the ‘Manage Images’ link found on the replacement message group configuration page.

Administration for schools

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Administration for schools

For system administrator in the school system it is particularly difficult to maintain a network and access to the Internet. There are potential legal liabilities if content is not properly filtered and children are allowed to view pornography and other non-productive and potentially dangerous content. For a school, too much filtering is better than too little. This section describes some basic practices administrators can employ to help maintain control without being too draconian for access to the internet.

 

Security policies

The default security policies in FortiOS allow all traffic on all ports and all IP addresses. Not the most secure. While applying UTM profiles can help to block viruses, detect attacks and prevent spam, this doesn’t provide a solid overall security option. The best approach is a layered approach; the first layer being the security policy.

When creating outbound security policies, you need to know the answer to the question “What are the students allowed to do?” The answer is surf the web, connect to FTP sites, send/receive email, and so on.

Once you know what the students need to do, you can research the software used and determine the ports the applications use. For example, if the students only require web surfing, then there are only two ports (80 – HTTP and 443 – HTTPS) needed to complete their tasks. Setting the security policies to only allow traffic through two ports (rather than all 65,000), this will significantly lower any possible exploits. By restricting the ports to known services, means stopping the use of proxy servers, as many of them operate on a non-standard port to hide their traffic from URL filtering or HTTP inspection.

 

DNS

Students should not be allowed to use whatever DNS they want. this opens another port for them to use and potentially smuggle traffic on. The best approach is to point to an internal DNS server and only allow those devices out on port 53. Its the same approach one would use for SMTP. Only allow the mail server to use port 25 since nothing else should be sending email.

If there is no internal DNS server, then the list of allowed DNS servers they can use should be restrictive. One possible exploit would be for them to set up their own DNS server at home that serves different IPs for known hosts, such as having Google.com sent back the IP for playboy.com.

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IP addresses for self-originated traffic

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IP addresses for self-originated traffic

On the FortiGate unit, there are a number of protocols and traffic that is specific to the internal workings of FortiOS. For many of these traffic sources, you can identify a specific port/IP address for this self-originating traffic. The following traffic can be configured to a specific port/IP address:

  • SNMP
  • Syslog
  • alert email
  • FortiManager connection IP
  • FortiGuard services
  • FortiAnalyzer logging
  • NTP
  • DNS
  • Authorization requests such as RADIUS
  • FSSO

Configuration of these services is performed in the CLI. In each instance, there is a command set source-ip. For example, to set the source IP of NTP to be on the DMZ1 port with an IP of 192.168.4.5, the commands are:

config system ntp

set ntpsync enable set syncinterval 5

set source-ip 192.168.4.5 end

 

To see which services are configured with source-ip settings, use the get command:

get system source-ip status

 

The output will appear similar to the sample below:

NTP: x.x.x.x DNS: x.x.x.x SNMP: x.x.x.x

Central Management: x.x.x.x

FortiGuard Updates (AV/IPS): x.x.x.x

FortiGuard Queries (WebFilter/SpamFilter): x.x.x.x

FortiClient discovery and registration

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FortiClient discovery and registration

FortiOS provides, FortiHeartBeat, a means of allowing users running FortiClient Endpoint Control software to connect to specific interfaces when connecting to the FortiGate unit. As well as ensuring that remote or local users have FortiClient Endpoint Control software installed on their PC or mobile device.

 

FortiClient discovery

You can configure a FortiGate interface as an interface that will accept FortiClient connections. When configured, the FortiGate unit sends broadcast messages which the FortiClient software running on an end user PC is listening for.

 

To enable the broadcast message

1. Go to System > Network > Interface.

2. Edit the interface to send the broadcast messages.

3. Select FortiHeartBeat.

4. In Admission Control, select Enforce FortiHeartBeat for all FortiClients.

5. Select OK.

Once enabled, the FortiGate unit broadcasts a discovery message that includes the IP address of the interface and listening port number to the local network. All PCs running FortiClient on that network listen for this discovery message.

You also have the option of including a registration key. When the FortiClient discovers the FortiGate unit, it is prompted to enter a registration key, defined by the administrator.

 

To add a registration key

1. Go to System > Config > Advanced.

2. Select Enable Registration Key for FortiClient, and enter the key.

3. Select Apply.

Ensure you distribute the key to the users that need to connect to the FortiGate unit.

 

FortiClient Registration

On the end user side, if FortiClient has not been registered with the FortiGate unit, it is continually listening for the FortiGate discovery message. When this message is detected the un-registered client will pop-up a FortiGate Detected message. The user can choose to either register or ignore the message.

Clients that have registered with that FortiGate unit will not be listening for these messages and will not display the message again.

If you enabled the registration key, the user is prompted to enter the key before a connection can be completed.

There can be some confusion when discussing the compatibility of FortiClient with FortiGate. There is technical compatibility and licensing compatibility. FortiClient software may not be licence compatible with previous versions of FortiOS.

For instance, while FortiClient 5.2 software is technologically compatible with a FortiGate running FortiOS 5.0 firmware. A FortiGate running FortiOS 5.0 will not recognize the FortiClient 5.2 licence code. Depending on the restrictions of your particular situation, you can:

  • Use FortiClient 5.2 without licensing
  • Use FortiClient 5.0 with licensing
  • Upgrade to FortiOS firmware 5.2

 

For more information on FortiGate registration, see the FortiClient Administration Guide.

Dynamic DNS

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Dynamic DNS

If your ISP changes your external IP address on a regular basis, and you have a static domain name, you can configure the external interface to use a dynamic DNS service to ensure external users and/or customers can always connect to your company firewall.

If you have a FortiGuard subscription, you can use FortiGuard as your DDNS server. To configure dynamic DNS in the web-based manager, go to System > Network > DNS, select Enable FortiGuard DDNS, and enter the relevant information for the interface communicating to the server, and which server to use, and relevant information.

If you do not have a FortiGuard subscription, or want to use an alternate server, you can configure dynamic DNS in the CLI use the commands below. Within the CLI you can configure a DDNS for each interface. Only the first configured port appears in the web-based manager. Additional commands vary with the DDNS server you select.

 

config system ddns

edit <instance_value>

set monitor-interface <external_interface>

set ddns-server <ddns_server_selection>

end

 

You can also use FortiGuard (when subscribed) as a DDNS as well. To configure, use the CLI commands:

config system fortiguard set ddns-server-ip

set ddns-server-port end

DNS services

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DNS services

A DNS server is a public service that converts symbolic node names to IP addresses. A Domain Name System (DNS) server implements the protocol. In simple terms, it acts as a phone book for the Internet. A DNS server matches domain names with the computer IP address. This enables you to use readable locations, such as fortinet.com when browsing the Internet. FortiOS supports DNS configuration for both IPv4 and IPv6 addressing.

The FortiGate unit includes default DNS server addresses. However, these should be changed to those provided by your Internet Service Provider. The defaults are DNS proxies and are not as reliable as those from your ISP.

Within FortiOS, there are two DNS configuration options; each provide a specific service, and can work together to provide a complete DNS solution.

 

DNS settings

Basic DNS queries are configured on interfaces that connect to the Internet. When a web site is requested, for example, the FortiGate unit will look to the configured DNS servers to provide the IP address to know which server to contact to complete the transaction.

DNS server addresses are configured by going to System > Network > DNS. Here you specify the DNS server addresses. Typically, these addresses are supplied by your ISP. An additional option is available if you have local Microsoft domains on the network, by entering a domain name in the Local Domain Name field.

In a situation where all three fields are configured, the FortiGate unit will first look to the local domain. If no match is found, a request is sent to the external DNS servers.

If virtual domains are enabled, you create a DNS database in each VDOM. All of the interfaces in a VDOM share the DNS database in that VDOM.

 

Additional DNS CLI configuration

Further options are available from the CLI with the command config system dns. Within this command you can set the following commands:

  • dns-cache-limit – enables you to set how many DNS entries are stored in the cache. Entries that remain in the cache provide a quicker response to requests than going out to the Internet to get the same information.
  • dns-cache-ttl – enables you to set how long entries remain in the cache in seconds, between 60 and 86,400 (24 hours).
  • cache-notfound-responses – when enabled, any DNS requests that are returned with NOTFOUND can be stored in the cache.
  • source-ip – enables you to define a dedicated IP address for communications with the DNS server.

 

DNS server

You can also create local DNS servers for your network. Depending on your requirements, you can manually maintain your entries (master DNS server), or use it as a jumping point, where the server refers to an outside source (slave DNS server). A local master DNS server works similarly to the DNS server addresses configured in System > Network > DNS, but all entries must be added manually. This enables you to add a local DNS server to include specific URL/IP address combinations.

 

The DNS server options are not visible in the web-based manager by default. To enable the server, go to System > Config > Featuresand select DNS Database.

While a master DNS server is an easy method of including regularly used addresses to save on going to an outside DNS server, it is not recommended to make it the authoritative DNS server. IP addresses may change, and maintaining any type of list can quickly become labor-intensive.

A FortiGate master DNS server is best set for local services. For example, if your company has a web server on the DMZ that is accessed by internal employees as well as external users, such as customers or remote users. In this situation, the internal users when accessing the site would send a request for website.example.com, that would go out to the DNS server on the web, to return an IP address or virtual IP. With an internal DNS, the same site request is resolved internally to the internal web server IP address, minimizing inbound/outbound traffic and access time.

As a slave, DNS server, the FortiGate server refers to an external or alternate source as way to obtain the url/IP combination. This useful if there is a master DNS server for a large company where a list is maintained. Satellite offices can then connect to the master DNS server to obtain the correct addressing.

The DNS server entries does not allow CNAME entries, as per RFC 1912, section 2.4.

 

To configure a master DNS server – web-based manager

1. Go to System > Network > DNS Server, and select Create New for DNS Database.

2. Select the Type of Master.

3. Select the View as Shadow.

4. The view is the accessibility of the DNS server. Selecting Public, external users can access, or use, the DNS server. Selecting Shadow, only internal users can use it.

5. Enter the DNS Zone, for example, WebServer.

6. Enter the domain name for the zone, for example com.

7. Enter the hostname of the DNS server, for example, Corporate.

8. Enter the contact address for the administrator, for example, admin@example.com.

9. Set Authoritative to Disable.

10. Select OK.

11. Enter the DNS entries for the server by selecting Create New.

12. Select the Type, for example, Address (A).

13. Enter the Hostname, for example example.com.

14. Enter the remaining information, which varies depending on the Type selected.

15. Select OK.

 

To configure a DNS server – CLI

config system dns-database edit WebServer

set domain example.com set type master

set view shadow set ttl 86400

set primary-name corporate set contact admin@exmple.com set authoritative disable

config dns-entry edit 1

set hostname web.example.com set type A

set ip 192.168.21.12 set status enable

end end

 

Recursive DNS

You can set an option to ensure these types of DNS server is not the authoritative server. When configured, the FortiGate unit will check its internal DNS server (Master or Slave). If the request cannot be fulfilled, it will look to the external DNS servers. This is known as a split DNS configuration.

You can also have the FortiGate unit look to an internal server should the Master or Slave not fulfill the request by using the CLI commands:

config system dns-database edit example.com

…

set view shadow

end

 

For this behavior to work completely, for the external port, you must set the DNS query for the external interface to be recursive. This option is configured in the CLI only.

 

To set the DNS query

config system dns-server edit wan1

end

set mode recursive