My IT notes
A network refers to a group of interconnected devices or systems that can communicate with each other. This can include computer networks, telecommunications networks, and transportation networks. In computing, a network is a group of computers and other devices connected together, often using a wired or wireless connection, to share resources and exchange data. Examples of networks include local area networks (LANs), wide area networks (WANs), and the internet.
The Advanced Research Projects Agency Network (ARPANET) was the first network to implement TCP/IP, one of the world’s first operational packet switching networks, and was a pioneer of what would become the global Internet. The network was initially funded by the Advanced Research Projects Agency (ARPA, later DARPA) at the U.S. Department of Defense, for … Read more
It is a term formed from the words “International” Network, which means international network. The Internet is a multi-protocol network and can also be defined as all interconnected computer networks. It is characterized as an electronic communication network that is independent of all restrictions and borders around the world, functions outside of central control and … Read more
IP is an abbreviation of the words “Internet Protocol”. IP is a protocol that allows devices on the internet to communicate with each other. All devices on the Internet (computers, smartphones, tablets, servers, etc.) It has a unique identification number called an IP address. These IP addresses are used to transmit data packets over the … Read more
Enabling SNMP on Fortinet This article discusses SNMP activation on Fortinet. SNMP is also enabled on the Network –> Interfaces menu on fortinet. In the second stage, SNMP Agent is activated in the System –> SNMP menu. A record is created to set the requirements based on the type of SNMP v1/v2c you will use. … Read more
This note mentions how to learn the serial number in Ubiquiti Unifi access points. There is no field on the panel where we manage Ubiquiiti devices that shows the serial number of access points. To access this information, we need to connect to the device with SSH and run the following code. SSH information can … Read more
Intrusion Prevention System is a critical component of network security that protects devices, servers from new and existing vulnerabilities. IPS technologies examine all network traffic, including encrypted traffic, helping organizations identify malicious traffic and proactively preventing such traffic from entering their networks. You can check out the article below. Apply IPS filtering on Fortigate
Fortigate also create a valid firewall policy to apply its IPS (What is intrusion Prevention System ?) filter, from Wan to Clinet or Wan, and in rules such as Server, the Security Profiles section also processs with defult settings. Since defult settings have over 7000 (constantly updated) IPS signatures, it would be a better decision … Read more
Fortinet users were affected globally due to a problem with a root certification authority’s (ISRG Root X1) certificate chain, and users encountered the problem as follows. The following steps can be applied as a workaround to this problem. Because this solution will create a security vulnerability, the system update that … Read more
“Starting services” error in Mikrotik. During the opening of microtic devices, we may encounter an error of “starting services” on the screen. In this case, the device becomes inoperable. “Starting services” may become inexplifiable due to damage to the configuration on the device due to a power outage and the installation of a configuration backup … Read more
Fortigate – Adjustments made on the Microtic side during the final stage of IPSEC VPN configuration between Mikrotik consist of NAT and IPSEC sections. Nat creation first Ip -> FIREWALL -> Nat tab creates a new rule and determines the source and destination address blocks with the srcnat option. The IPSEC phase completes in 3 steps; In Phase 2, the IP -> IPSEC ->Peer tab enters the WAN ip address … Read more