UDP 111

Looking for information on Protocol UDP 111? This page will attempt to provide you with as much port information as possible on UDP Port 111.

UDP Port 111 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 111

Here is what we know about protocol UDP Port 111. If you have information on UDP port 111 that is not reflected on this page, simply leave a comment and we’ll update our information.

PORT 111 – Information

• Port Number: 111
• TCP / UDP: UDP
• Delivery: No
• Protocol / Name: sunrpc
• Port Description: Sun’s RPC Portmapper. Used to map non-registered rpc service ports on most Unix systems (Irix uses port 1). Security Concerns: Provides rpc port map w/o auth. – Has no filtering or logging. – Attacker rpcinfo probes quickly find your Unix hosts. – Solaris hosts open a second port above 32770. Attackers will scan for and use it, knowing net devices won’t watch & log this like 111 traffic. Enhance your portmapper to get ACL filtering and logging: BSD: Install \portmap wrapper\. – System V & Solaris: Install Venema’s \rpcbind replacement\. Both require libwrap.a from a compiled TCP Wrapper program. Shut down portmapper on any hosts not requiring rpc’s. Ensure blocked at all net perimeters.
• Virus / Trojan: No

  Tip! Use our free Digital Footprint and Firewall Test to help verify you are not infected.

Side note: UDP port 111 uses the Datagram Protocol, a communications protocol for the Internet network layer, transport layer, and session layer. This protocol when used over PORT 111 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 111, UDP Port 111 is connectionless and does not guarantee reliable communication; it’s up to the application that received the message on Port 111 to process any errors and verify correct delivery.

Because protocol UDP port 111 was flagged as a virus (colored red) does not mean that a virus is using port 111, but that a Trojan or Virus has used this port in the past to communicate.

UDP 111 – Disclaimer

We do our best to provide you with accurate information on PORT 111 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!