Port 89?

Can anyone tell me what is this port 89 for? I understand that it is "SU/MIT Telnet Gateway". But what
is it for? What is "SU/MIT"?
Who is Participating?
lrmooreConnect With a Mentor Commented:
If Oracle is using port 89 for parts of their web, then it can't hurt to setup an explicit rule to allow port 89, but restrict it to only oracle's IP network.
This tells you all about ports and port assignments:

If you're looking for protocol 89, that is OSPF. See RFC 1583.

port 89 is a dedicated services port used as a Telnet Gateway between Mass Institue of Technology (MIT) and ___ University (SU)

Ports are used in the TCP [RFC793] to name the ends of logical connections which carry long term conversations. For the purpose of providing services to unknown callers, a service contact port is defined. This list specifies the port used by the server process as its contact port. The contact port is sometimes called the "well-known port".

nkongAuthor Commented:
Sorry for delay.
Actually what I'm worrying is if I open the port 89 at our Firewall. What's the impact and threat to our security. Do you have any info regarding this or any info regarding security issue. I really don't know which port is safe to be opened and which is not. What're the actions that will open the opportunity for hacker to intrude our system?
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Unless you have a very specific reason for opening it, why would you even consider it? Why open a port that won't be used?

Keep this port list handy for future reference:


And this one:
nkongAuthor Commented:
To access this site http://technet.oracle.com/support/bboard/discussions.htm, this port has to be allowed for the connection to this URL. That's why we're wondering whether any impact if we do so.
nkongAuthor Commented:
Thanks Irmore
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