Configuring DHCP Relay service on the FortiGate unit

Configuring DHCP Relay service on the FortiGate unit

If the clients are configured to obtain a IP address using DHCP relay, configure the FortiGate server as below:

To configure DHCP relay on the FortiGate unit
  1. Go to System > Network > Interfaces and select Interface want to configure DHCP relay.
  2. Enable DHCP Server in the interface and choose Advanced
  3. For Mode, select Relay.
  4. In Type select Regular.
  5. Select OK.
  6. If a router is installed between the FortiGate unit and the DHCP server, define a static route to the DHCP server.

Note : Sometimes it is required to specify more than one DHCP relay IP, to allow for the coverage of additional LAN subnets. Although the Web Based Manager (GUI) does not provide an option to configure this, it is possible to set up to 8 IPs from the CLI.

      config system interface
            edit <REQUIRED_INTERFACE_HERE>
              set dhcp-relay-ip <FIRST_IP> <SECOND_IP> ....<EIGHTH_IP>
            end
       end

In sone case the Advanced... option do not show in the Web UI. We can enable with the command below:

config system global   
     set gui-dhcp-advanced enable
end

Troubleshooting – DHCP

The following commands are used to best troubleshoot the DHCP process:
#diag debug en
#diag debug console timestamp en
The following is used if we use IPSec DHCP relay
#diag debug app dhcprelay 7
The following is used if we are using IPsec DHCP Server
#diag debug app dhcps 7

Nhận xét

Đăng nhận xét

Bài đăng phổ biến từ blog này

CLEANING UP THE ZABBIX DATABASE

My Zabbix database size increased a lot in the last few months and since my disk was running out space, I decided to clean up the old events from the database. Looking at the database tables, the biggest one was  history_uint , which holds the items history data – over 400 millions of records and over 30 Gb of disk space before the clean up. Since deleting the old records from this table directly would be a very slow process, I decided to create a new table and insert the latest records from the  history_uint  table and then just replace the old table with a new one. Since this is not an offical procedure, use it at your own risk. Environment: Zabbix v2.2 MySql 5.1 – InnoDB with  innodb_file_per_table=ON Step 1 – Stop the Zabbix server Step 2 – Open your favourite MySQL client and create a new table CREATE TABLE  history_uint_new  LIKE  history_uint; Step 3 – Insert the latest records from the  history_uint  table to the  history_uint_new table First you need to de
Đọc thêm

Stuxnet Trojan - Memory Forensics with Volatility | Part I

Hình ảnh
Stuxnet could be the first advanced malware. It is thought that it was developed by the United States and Israel to attack Iran's nuclear facilities. It attacked Windows systems using a zero-day exploit and It was focused on SCADA systems in order to  affect critical infrastructures... Also, it may be spread from USB drivers. It is necessary a squad of highly capable programmers with depth of knowledge of industrial processes and an interest in attacking industrial infrastructure to develop this malware. Kaspersky Lab concluded that the sophisticated attack could only have been conducted "with nation-state support" and a study of the spread of Stuxnet by Symantec says that it was spread to Iran (58.85%), Indonesia (18.22%), India (8.31%), Azerbaijan (2.57%).... Thanks to Malware Cookbook we can download a memory dump from an infected host with this malware in the URL below:  http://www.jonrajewski.com/data/Malware/stuxnet.vmem.zip Ok, let’s go. We are going to analyze i
Đọc thêm