300-820 · Question #177
Refer to the exhibit. When users sign in to Cisco Jabber through Mobile and Remote Access, they cannot see their own photo or the photo of their contacts next to each name. Which action must be…
The correct answer is D. Add an HTTP allow list for the web server that contains the photos. When Jabber users connected via MRA cannot see contact photos, the Expressway-C HTTP allow list must include the external web server hosting the photos so that photo retrieval requests are permitted through the Expressway proxy.
Question
Refer to the exhibit. When users sign in to Cisco Jabber through Mobile and Remote Access, they cannot see their own photo or the photo of their contacts next to each name. Which action must be taken in Cisco Expressway-C to resolve the issue?
Exhibit
Options
- AAdd an HTTP allow list for the Instant Message and Presence server.
- BAdd an allow call policy rule from the Cisco UCM traversal zone.
- CUpload the missing Instant Messaging and Presence server certificate to fix the connection to its
- DAdd an HTTP allow list for the web server that contains the photos.
How the community answered
(48 responses)- A4% (2)
- B8% (4)
- C15% (7)
- D73% (35)
Why each option
When Jabber users connected via MRA cannot see contact photos, the Expressway-C HTTP allow list must include the external web server hosting the photos so that photo retrieval requests are permitted through the Expressway proxy.
The Instant Message and Presence (IMP) server does not host contact photos; adding it to the allow list does not resolve photo retrieval failures from a separate web server.
An allow call policy rule governs call routing decisions, not HTTP-based photo retrieval traffic.
Uploading a certificate from the IMP server addresses TLS trust for presence connectivity, not the ability to fetch photos from a photo-hosting web server.
Expressway-C acts as an HTTP proxy for MRA clients, and by default it blocks HTTP/HTTPS requests to arbitrary external servers. Adding the web server that stores the contact photos to the HTTP allow list on Expressway-C explicitly permits Jabber clients to retrieve photo URLs through the MRA infrastructure.
Concept tested: Expressway-C HTTP allow list for MRA photo retrieval
Source: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/config_guide/X14-3/exwy_b_mra-deployment-guide/exwy_m_jabber-and-mra.html
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