how can I release a UDP port 161?

I want to use Udp Port 161 for my applicatipon to run but when I start my application it will show a message that port 161 is already in use.How can i use it?

Feb 22 '07 #1

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12539

bartonc

6,596

Expert 4TB

I want to use Udp Port 161 for my applicatipon to run but when I start my application it will show a message that port 161 is already in use.How can i use it?

There's probably a better way, but for now you can go to Control Panel; Windows Firewall; Exception tab. Then click on enabled items and use the Edit button to see which port it is using that port. Once you find it you can disable it and see what breaks. If everything still works then this entry is out of date and can be deleted (or just leave it disabled "just in case").

Feb 22 '07 #2

Cyberdyne

627

Expert 512MB

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.

Regards, Cyber.

Feb 23 '07 #3

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