Top 20 and 200 most scanned ports in the cybersecurity

14 rows Allow Both TCP and UDP Port 53 to Your DNS Servers TCP port 53 can be used in the cases where the DNS responses greater than 512 bytes. However, using UDP messages are preferable to using TCP for large DNS messages is due to the fact that TCP TCP 53 - Port Protocol Information and Warning! Port 53 is used by the Domain Name System (DNS), a service that turns human readable names like AuditMyPc.com into IP addresses that the computer understands. Because port 53 is usually open, malicious programs may attempt to communicate on it. PORT 53 – Information. Port Number: 53; TCP / UDP: TCP; Delivery: Yes; Protocol / Name: DNS (legitimate) [Malware known as Lion] What is port 53 used for - Answers Is Port 53 a wide known port number? Yes, Port 53 is a widely-known port number. In Internet connections, every port labeled 1 to 1023 is considered a 'well-known' port. These ports are used as

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If our port analysis reveals that your system's port 53 is open and listening for incoming traffic, you should determine what's going on. Even though only a few Trojan programs are known to open port 53, the exact behavior of malicious software is a constantly moving target which is why periodic security checkups here are always worthwhile. List of TCP and UDP port numbers - Wikipedia 248 rows Ports Used For Active Directory Authentication and

Client - Server Connection Ports. Port 3306 is the default port for the MySQL Protocol (port), which is used by the mysql client, MySQL Connectors, and utilities such as mysqldump and mysqlpump.The port for X Protocol (mysqlx_port), supported by clients such as MySQL Shell, MySQL Connectors and MySQL Router, is calculated by multiplying the port used for MySQL Protocol by 10.

Jul 11, 2017 linux - When would I open Port 53 for DNS? - Server Fault Port 53 is open for DNS. Why would I need this? You need to have UDP 53 allowed for responses to DNS queries that your server sends, as UDP is a stateless protocol. Don't block it if you want any kind of outbound connectivity, software updates, etc. Commonly Hacked Ports - dummies TCP port 25 — SMTP (Simple Mail Transfer Protocol) TCP and UDP port 53 — DNS (Domain Name System) TCP port 443 — HTTP (Hypertext Transport Protocol) and HTTPS (HTTP over SSL) TCP port 110 — POP3 (Post Office Protocol version 3) TCP and UDP port 135 — Windows RPC. TCP and UDP ports 137–139 — Windows NetBIOS over TCP/IP.