https://community.cisco.com/t5/collaboration-applications/jabber-over-vpn-requirement/m-p/5548388#M51491 <P>I'm not aware of a Cisco document that instructs you how to configure the firewall (you didn't specify make/model) for Jabber. The most common gotchas I have seen here are:</P> <OL> <LI>Is protocol inspection (SIP, RTP, etc.) disabled for VPN users? Verify it is disabled for traffic amongst VPN-connected users as well as between the internal network and the VPN client. I have seen customers overlook the former a few times.</LI> <LI>If this is a split tunnel setup, be sure that&nbsp;<EM>everything</EM> the VPN-connected Jabber app needs to communicate with on the internal network - such as PSTN gateways - are included in the tunnel list. The VPN client address pool also needs to be included in the tunnel list. <UL> <LI>Also ensure that split DNS tunnels the domains needed for Jabber to complete Service Discovery correctly (_cisco-uds&nbsp;<EM>not</EM> _collab-edge).</LI> </UL> </LI> <LI>An ACL blocking traffic. The Jabber Planning Guide includes a condensed <A href="https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/jabber/14_1/cjab_b_planning-guide-for-jabber141/cjab_m_planning-requirements-129.html#reference_4E62DC7251D527BB31B4D5C25A77ED7A" rel="noopener" target="_blank">ports and protocols table</A>, for reference.</LI> </OL> Mon, 27 Apr 2026 15:56:41 GMT Jonathan Schulenberg 2026-04-27T15:56:41Z https://community.cisco.com/t5/collaboration-applications/jabber-over-vpn-requirement/m-p/5548264#M51490 <P>client is trying to establish jabber over vpn. every thing looks ok except facing one way audio issue.<BR /><BR />what are requirement for jabber over vpn ?any guide for this? routing issues? what all things to consider in this case.<BR /><BR />jabber over vpn to jabber over vpn<BR />jabber over vpn to internal office exension<BR />jabber over vpn to PSTN calls<BR /><BR />what all requirement to be considered. cucm version seems 14.x&nbsp;</P> Mon, 27 Apr 2026 08:22:59 GMT https://community.cisco.com/t5/collaboration-applications/jabber-over-vpn-requirement/m-p/5548264#M51490 jaheshkhan 2026-04-27T08:22:59Z https://community.cisco.com/t5/collaboration-applications/jabber-over-vpn-requirement/m-p/5548388#M51491 <P>I'm not aware of a Cisco document that instructs you how to configure the firewall (you didn't specify make/model) for Jabber. The most common gotchas I have seen here are:</P> <OL> <LI>Is protocol inspection (SIP, RTP, etc.) disabled for VPN users? Verify it is disabled for traffic amongst VPN-connected users as well as between the internal network and the VPN client. I have seen customers overlook the former a few times.</LI> <LI>If this is a split tunnel setup, be sure that&nbsp;<EM>everything</EM> the VPN-connected Jabber app needs to communicate with on the internal network - such as PSTN gateways - are included in the tunnel list. The VPN client address pool also needs to be included in the tunnel list. <UL> <LI>Also ensure that split DNS tunnels the domains needed for Jabber to complete Service Discovery correctly (_cisco-uds&nbsp;<EM>not</EM> _collab-edge).</LI> </UL> </LI> <LI>An ACL blocking traffic. The Jabber Planning Guide includes a condensed <A href="https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/jabber/14_1/cjab_b_planning-guide-for-jabber141/cjab_m_planning-requirements-129.html#reference_4E62DC7251D527BB31B4D5C25A77ED7A" rel="noopener" target="_blank">ports and protocols table</A>, for reference.</LI> </OL> Mon, 27 Apr 2026 15:56:41 GMT https://community.cisco.com/t5/collaboration-applications/jabber-over-vpn-requirement/m-p/5548388#M51491 Jonathan Schulenberg 2026-04-27T15:56:41Z