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[Network Security]
An engineer is configuring 802.1X authentication on Cisco switches in the network and is using CoA as a mechanism. Which port on the firewall must be opened to allow the CoA traffic to traverse the network?
Suggested Answer: B
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CoA Messages are sent on two different udp ports depending on the platform. Cisco standardizes on UDP port
1700, while the actual RFC calls out using UDP port 3799.
20 comments · newest first
LA
Lashonda
2 months ago
Definitely UDP 1700. It’s used for CoA in some setups.
NO
Novella
2 months ago
I doubt TCP 6514 is correct. It's not related to CoA.
RO
Roslyn
2 months ago
What about TCP 6514? Isn't that for syslog?
VA
Vallie
2 months ago
I agree with Margarett. RADIUS uses UDP 1812 for authentication.
MA
Margarett
2 months ago
I feel like UDP 1812 is the right choice. It's for RADIUS, right?
KA
Kattie
2 months ago
I think it's TCP 49. Seems logical for authentication.
MA
Margarett
3 months ago
Wait, are we sure about that? I thought CoA used a different port.
AS
Ashanti
3 months ago
I agree with UDP 1812, seems like the best choice.
GI
Gilma
3 months ago
Definitely TCP 6514, that's for syslog!
FA
Fannie
3 months ago
I thought it was UDP 1812, isn't that the standard for RADIUS?
CL
Clement
3 months ago
It's TCP 49 for RADIUS, right?
GO
Goldie
3 months ago
I agree, but why not UDP 1700?
ME
Meaghan
4 months ago
Definitely TCP 49, no doubt!
RA
Rana
4 months ago
Wait, are we sure about that?
BE
Beckie
5 months ago
I thought it was UDP 1812!
BR
Brigette
6 months ago
It's TCP 49 for RADIUS, right?
AN
Anissa
6 months ago
I’m leaning towards UDP 1700 since it sounds familiar, but I might be mixing it up with something else.
AS
Asha
6 months ago
I feel like I read that CoA traffic needs to go through a specific port, but I can't recall if it's UDP or TCP.
AL
Allene
6 months ago
I remember practicing a similar question, and I think TCP 49 was mentioned for TACACS+, but I'm confused about the CoA specifics.
KA
Kaitlyn
7 months ago
I think CoA uses RADIUS, so it might be UDP 1812, but I'm not entirely sure.