UDP 161
UDP port 161 protocol information and warnings.
Looking for information on Protocol UDP 161? This page will attempt to provide you with as much port information as possible on UDP Port 161.
UDP Port 161 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 161
Here is what we know about protocol UDP Port 161. If we do not have any information on port 161 in our database, a counter will be set for UDP port 161. After enough hits, we'll research this port and update the database.
If you have information on UDP port 161 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 161 will have the most accurate information.
PORT 161 - Information
| Port Number: | 161 |
| TCP / UDP: | UDP |
| Delivery: | No |
| Protocol / Name: | snmp |
| Port Description: | SNMP Agent. Used to connect with and configure or request data from a running snmp agent on a network host. Security Concerns: Many!. - Default community strings: \public\. - Cleartext data exchanges (inluding auth with string). - Not hard to trick agent into revealing its string & manager IP. - To access agent's data or reconfig it, only need string and source IP of snmp manager (then spoof manager). Snmp v2 has better security, but is not incorporated into many products. Snmp v3 is being fielded, thus will slowly take over. |
| Virus / Trojan: | No |
Side note: UDP port 161 uses the Datagram Protocol, a communications protocol for the Internet network layer, transport layer, and session layer. This protocol when used over PORT 161 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 161, UDP Port 161 is connectionless and does not guarantee reliable communication; it's up to the application that received the message on Port 161 to process any errors and verify correct delivery.
UDP 161 - Disclaimer
We do our best to provide you with accurate information on PORT 161 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!