UDP 53
UDP port 53 protocol information and warnings.
Looking for information on Protocol UDP 53? This page will attempt to provide you with as much port information as possible on UDP Port 53.
UDP Port 53 may use a defined protocol to communicate depending on the application. A protocol is a set of formalized rules that explains how data is communicated over a network. Think of it as the language spoken between computers to help them communicate more efficiently.
Protocol HTTP for example defines the format for communication between internet browsers and web sites. Another example is the IMAP protocol that defines the communication between IMAP email servers and clients or finally, the SSL protocol which states the format to use for encrypted communications.
UDP Port 53
Here is what we know about protocol UDP Port 53. If we do not have any information on port 53 in our database, a counter will be set for UDP port 53. After enough hits, we'll research this port and update the database.
If you have information on UDP port 53 that is not reflected in our database, please leave a comment or post your information on our Web Security Forum. We'll update our database so that the next user searching for port 53 will have the most accurate information.
PORT 53 - Information
| Port Number: | 53 |
| TCP / UDP: | UDP |
| Delivery: | No |
| Protocol / Name: | domain |
| Port Description: | Domain Name Server (DNS).DNS servers offer different services on TCP and UDP. TCP is used for "zone transfers" of full name record databases, while UDP is used for individual lookups. Security Concerns: Zone Transfers give away entire network maps; high value to attackers. - DNS (BIND) is a popular target, since DNS servers must exist, must be reachable, and exploits usually result DOS or root. Keep BIND version/patches current (refer to www.isca.org). Use "split-DNS" |
| Virus / Trojan: | No |
Side note: UDP port 53 uses the Datagram Protocol, a communications protocol for the Internet network layer, transport layer, and session layer. This protocol when used over PORT 53 makes possible the transmission of a datagram message from one computer to an application running in another computer. Like TCP (Transmission Control Protocol), UDP is used with IP (the Internet Protocol) but unlike TCP on Port 53, UDP Port 53 is connectionless and does not guarantee reliable communication; it's up to the application that received the message on Port 53 to process any errors and verify correct delivery.
UDP 53 - Disclaimer
We do our best to provide you with accurate information on PORT 53 and work hard to keep our database up to date. This is a free service and accuracy is not guaranteed. We do our best to correct any errors and welcome feedback!