<div dir="ltr">It's always up to the caller and what SRV records they check and in which order. Webex always prefers the TLS SRV records first though.</div><br><div class="gmail_quote"><div dir="ltr">On Thu, Aug 2, 2018 at 12:10 PM Lelio Fulgenzi <<a href="mailto:lelio@uoguelph.ca">lelio@uoguelph.ca</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal">Thanks Brian. <u></u><u></u></p>
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<p class="MsoNormal">I meant to write: _<i>without</i>_ the need for licenses – but good to be corrected, since it does firm up my assumptions.<u></u><u></u></p>
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<p class="MsoNormal">I’ll take a look at the document. We’re working with a partner, so I’m hoping not to have to be to versed with he deployment details too much, but the options available will be good to review.<u></u><u></u></p>
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<p class="MsoNormal">Will all B2B calls try 5061? If so, then that breaks my theory / thought about using ACLs, since MRA needs those ports.<u></u><u></u></p>
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<p class="MsoNormal"><b><span style="font-family:"Arial",sans-serif">Lelio Fulgenzi, B.A.</span></b><span style="font-family:"Arial",sans-serif"> | Senior Analyst<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:#333333">Computing and Communications Services</span><span style="font-family:"Arial",sans-serif"> | University of Guelph<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Room 037 Animal Science & Nutrition Bldg | 50 Stone Rd E | Guelph, ON | N1G 2W1<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">519-824-4120 Ext. 56354 |
<a href="mailto:lelio@uoguelph.ca" target="_blank"><span style="color:#0563c1">lelio@uoguelph.ca</span></a><u></u><u></u></span></p>
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<p class="MsoNormal"><a href="http://www.uoguelph.ca/ccs" target="_blank"><span style="font-family:"Arial",sans-serif">www.uoguelph.ca/ccs</span></a><span style="font-family:"Arial",sans-serif;color:#1f497d"> | @UofGCCS on Instagram, Twitter and Facebook<u></u><u></u></span></p>
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<p class="MsoNormal"><b>From:</b> Brian Meade <<a href="mailto:bmeade90@vt.edu" target="_blank">bmeade90@vt.edu</a>> <br>
<b>Sent:</b> Wednesday, August 1, 2018 9:16 AM<br>
<b>To:</b> Lelio Fulgenzi <<a href="mailto:lelio@uoguelph.ca" target="_blank">lelio@uoguelph.ca</a>><br>
<b>Cc:</b> cisco-voip voyp list <<a href="mailto:cisco-voip@puck.nether.net" target="_blank">cisco-voip@puck.nether.net</a>><br>
<b>Subject:</b> Re: [cisco-voip] Enabling CUCM/WebEx/B2B - firewall’ing thoughts?<u></u><u></u></p>
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<p class="MsoNormal">Lelio,<u></u><u></u></p>
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<p class="MsoNormal">You don't need RMS licenses for Webex calls. You need to use the exact settings mentioned in the Webex CMR Guide though- <a href="https://www.cisco.com/c/dam/en/us/td/docs/collaboration/webex_centers/esp/WebEx_Meeting_Center_Video_Conferencing_Enterprise_Deployment_Guide_WBS31_WBS32.pdf" target="_blank">https://www.cisco.com/c/dam/en/us/td/docs/collaboration/webex_centers/esp/WebEx_Meeting_Center_Video_Conferencing_Enterprise_Deployment_Guide_WBS31_WBS32.pdf</a><u></u><u></u></p>
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<p class="MsoNormal">Also Webex will typically try TLS inbound so I would just go with the _sips SRV record and just open inbound 5061 along with the audio ports. You can disable TCP/UDP 5060 from the Expressway as well.<u></u><u></u></p>
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<p class="MsoNormal">You can also setup mutual TLS with Webex for even more security. That way Expressway is only trusting Webex certificates for inbound calls. Most of that documentation is in the Hybrid Services Call Service Connect documentation.<u></u><u></u></p>
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<p class="MsoNormal">On Wed, Aug 1, 2018 at 9:09 AM Lelio Fulgenzi <<a href="mailto:lelio@uoguelph.ca" target="_blank">lelio@uoguelph.ca</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal">We’re finally taking a turn (not to be confused with TURN - hahaha) at getting CUCM talking to WebEx. Im guessing this is simply a B2B setup with the need for licenses. <u></u><u></u></p>
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<p class="MsoNormal">The question I have is whether or not I should be activating ACLs anywhere along the path to avoid the expressways from getting hammered and clogging up the logs. <u></u><u></u></p>
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<p class="MsoNormal">We’ll be enabling this on the MRA expressway pairs for the time being. <u></u><u></u></p>
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<p class="MsoNormal">From my understanding, MRA uses 5061, 8443, 5222 inbound and B2B uses 5060. <u></u><u></u></p>
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<p class="MsoNormal">Would it be advisable, to build ACLs only allowing certain address (space) to connect?<u></u><u></u></p>
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<p class="MsoNormal">This would be on top of any rules/zones we build into the ExpE and CUCM (css). <u></u><u></u></p>
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<p class="MsoNormal">We’re trying to avoid the obvious impact of scanning Ip addresses/uri’s for sip connectivity. <u></u><u></u></p>
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<p class="MsoNormal">What are people doing?<u></u><u></u></p>
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<p class="MsoNormal"><i>-sent from mobile device-</i><u></u><u></u></p>
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<p class="MsoNormal"><b>Lelio Fulgenzi, B.A.</b> | Senior Analyst<u></u><u></u></p>
<p class="MsoNormal">Computing and Communications Services | University of Guelph<u></u><u></u></p>
<p class="MsoNormal">Room 037 Animal Science & Nutrition Bldg | 50 Stone Rd E | Guelph, ON | N1G 2W1<u></u><u></u></p>
<p class="MsoNormal"><span style="color:black"><a href="tel:519-824-4120;56354" target="_blank">519-824-4120 Ext. 56354</a> | <a href="mailto:lelio@uoguelph.ca" target="_blank">lelio@uoguelph.ca</a></span><u></u><u></u></p>
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<p class="MsoNormal"><span style="color:black"><a href="http://www.uoguelph.ca/ccs" target="_blank">www.uoguelph.ca/ccs</a> | @UofGCCS on Instagram, Twitter and Facebook</span><u></u><u></u></p>
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