TCP 123
TCP port 123 protocol information and warnings.
Looking for information on Protocol TCP 123? This page will attempt to provide you with as much port information as possible on TCP Port 123.
TCP Port 123 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.
TCP Port 123
Here is what we know about protocol TCP Port 123. If we do not have any information on port 123 in our database, a counter will be set for TCP port 123. After enough hits, we'll research this port and update the database.
If you have information on TCP port 123 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 123 will have the most accurate information.
PORT 123 - Information
| Port Number: | 123 |
| TCP / UDP: | TCP |
| Delivery: | Yes |
| Protocol / Name: | ntp NetController |
| Port Description: | Network Time Protocol. Provides time synch between computers and network systems. Assists in database mgmt, auth schemes, and audit/logging accuracy. Security Concerns: It provides both info and an avenue of attack for intruders. Info gathered can include: system uptime, time since reset, time server pkt, I/O, & memory statistics, and ntp peer list. Further, if a host is susceptible to time altering via ntp, an attacker can: 1) Run replay attacks, using captured OTP and Kerberos tickets before they expire. 2) Stop security-related cron jobs from running or cause them to run at incorrect times. 3) Make system and audit logs unreliable, since time is alterable. Net Controller |
| Virus / Trojan: | Yes, Caution! Use our free Anonymous Surfing and Firewall Test. |
Side note: TCP port 123 uses the Transmission Control Protocol. TCP is one of the main protocols in TCP/IP networks. Whereas the IP protocol deals only with packets, TCP enables two hosts to establish a connection and exchange streams of data. TCP guarantees delivery of data and also guarantees that packets will be delivered on port 123 in the same order in which they were sent. Guaranteed communication over port 123 is the key difference between TCP and UDP. UDP port 123 would not have guaranteed communication in the same way as TCP.
Because protocol TCP port 123 was flagged as a virus (colored red) does not mean that a virus is using port 123, but that a Trojan or Virus has used this port in the past to communicate.
TCP 123 - Disclaimer
We do our best to provide you with accurate information on PORT 123 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!