Q9SecurityMultiple answers
Which two conditions can make port 8443 unreachable from the Internet to the Expressway-E? (Choose two.)
Select 2 answers.
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Community votes
Discussion · 12
6
Either the port is blocked, or the UC traversal zone is down.
6
Traffic is coming from the internet, so it cannot be the cisco_uds record, since it is created on the internal DNS only. Collab_edge is the external DNS record. It has to be port blocked or the traversal zone is down
B, E 5
Selected Answer: BE
B and E. Collab-edge is used for MRA, not UDS.
4
https://www.cisco.com/c/en/us/support/docs/unified-communications/expressway/118798-technote-cucm-00.html#anc6
Topic 1
B - The Unified Communications zone is down.
E - Firewall is blocking.
B, E 4
Selected Answer: BE
It should be BE
D, E 3
Selected Answer: DE
Traffic coming through an MRA pair (C&E) DOES use the _cisco-uds record to get from the C to CUCM. B is wrong because there is no unified Communications Zone (there is a UC Traversal zone, close, but different) in the expressway. Since the 8443 traffic is actually destined for CUCM, if the _cisco-uds record is botched, it won't get there...and thus it will be unreachable.
2
Not D, cisco-uds is an internal srv, collab-edge is the external (internet facing) srv record
1
D and E are the correct ones
D, E 1
Selected Answer: DE
There is no "Unified Communications zone", B can't be right....you cannot assume it refers to "Unified Communications traversal zone"
D, E 1
Selected Answer: DE
there is no unified communications zone, it is definitely DE, the _cisco-uds record must be present
1
Nothing in this link says anything about a "UC Zone". It does mention both the _cisco-uds SRV and firewalls blocking ports,
D, E 1
Selected Answer: DE
D & E are correct. The links in the comments do not refer to UC Zone at all.