i required Jabber Client register with IM & Presence from Internet. i have VCS Expressway-E (have CA certificate) and VCS Expressway-C (have certificate form CA Authority) but i did not purchase certificate for CUCM/IM & Presence. when i am trying to add CUCM and IM & Presence server in Expressway-C as TLS 'on' i am getting error so i found in the search that i need Cluster Security Mode '1' in CUCM enterprise parameter that currently i have '0' what else i need for this?
do i need certificate as well from CUCM? i do not want spend money for external certificate so can i generate certificate from CUCM and upload to Expressway-C. OR if i leave TLS off then what is would i loose?
i have VCS Expressway 8.7 version and CUCM/IM & Presence version 11.
it would be more helpful if you provided the error you are receiving. You do not need to have external certs for your CUCM and IMP, they will have either self-signed certs generated for them or internal CA certs you have installed.
TLS between is mandatory between EXPC and EXPE 5060 TCP/UDP can be used from EXPC to CUCM/IMP/UNITY (traffic between CUCM/IMP/UNITY to expressway C will not be encrypted) you can use TLS for these as well if you want to secure your traffic between EXPE and infrastructure
the only public cert required is for the expressway E everything else can use selfsigned or internal CA signed, you just need to ensure that you either provide the RootCA / Intermediate CA in the Trust stores for each Application or have the individual certs in the trust stores
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