?
Solved

Port 89?

Posted on 2001-06-26
6
Medium Priority
?
1,305 Views
Last Modified: 2011-10-03
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"?
0
Comment
Question by:nkong
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 3
6 Comments
 
LVL 79

Expert Comment

by:lrmoore
ID: 6229980
This tells you all about ports and port assignments:
http://www.iana.org/assignments/port-numbers

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".

0
 

Author Comment

by:nkong
ID: 6236878
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?
0
 
LVL 79

Expert Comment

by:lrmoore
ID: 6237929
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:

http://www.nethog.com/feeds/niteryder/trojans.htm

And this one:
http://www.robertgraham.com/pubs/firewall-seen.html
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 

Author Comment

by:nkong
ID: 6243939
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.
0
 
LVL 79

Accepted Solution

by:
lrmoore earned 150 total points
ID: 6244765
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.
0
 

Author Comment

by:nkong
ID: 6247194
Thanks Irmore
0

Featured Post

VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

New Server 172.16.200.2  was moved from behind Router R2 f0/1 to behind router R1 int f/01 and has now address 172.16.100.2. But we want users still to be able to connected to it by old IP. How to do it ? We can used destination NAT (DNAT).  In DNAT…
This article is a guide to configure bridging on Cisco Routers.  This is something I never knew was possible until after making a few phone calls to Cisco.  Using bridging saved our company money by not requiring us to purchase a new switch.  Bridgi…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Suggested Courses

764 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question