Hi Florian,
Yes all services are configured with forward and revers DNS records, and I have 
all the configurations validated and working fine in another client site with 
only one difference which is users here are created locally on CUCM while in 
the other client environment which is working there is LDAP integration for 
users provisioning.




BR
Ahmed Abd EL-Rahman
Senior Network Engineer

Sent from my iPhone

On Dec 22, 2017, at 12:01 AM, Florian Kroessbacher 
<[email protected]<mailto:[email protected]>> wrote:

Hy out there
Have u configured Revers DNS
Important!
From version X8.8 onward, you must create forward and reverse DNS entries for 
all Expressway-E systems, so that systems making TLS connections to them can 
resolve their FQDNs and validate their certificates.

Page 19
https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X8-9/Mobile-Remote-Access-via-Expressway-Deployment-Guide-X8-9.pdf


--

Florian Krößbacher
[email protected]<mailto:[email protected]>

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2017-12-21 17:15 GMT+01:00 Ahmed Abd EL-Rahman 
<[email protected]<mailto:[email protected]>>:
Hi Brian,

Under presence there is only one domain and all my servers are in the same 
domain which is the same internally and externally, we just have some users 
accounts on a different domain that’s why I added that domain just to EXP-E and 
added it’s related SRV records.

Please have a look on the attached logs taken from both Expressway C and E for 
a client which works fine from internal network then connected successfully 
from outside but the IM service is not working from outside.

I really do appreciate if you can hint me about possible reasons that make IM 
service not working from outside company network.








Best Regards

Ahmed Abd EL-Rahman
Senior Network Engineer

From: [email protected]<mailto:[email protected]> 
[mailto:[email protected]<mailto:[email protected]>] On Behalf Of Brian Meade
Sent: Tuesday, December 19, 2017 1:01 AM
To: Ahmed Abd EL-Rahman 
<[email protected]<mailto:[email protected]>>
Cc: [email protected]<mailto:[email protected]>
Subject: Re: [cisco-voip] Jabber IM service Issue

In IM&Presence under Presence->Domains, do you have multiple domains listed?  
Do you have something other than default under Presence Advanced configuration 
for setting domain names?  Setting the voice services domain is one of the few 
reasons you need to login internally first.

If you are using UserID@Default Domain then you shouldn't need to login 
internally first.  You may just need to remove the domain portion from the 
username on the username/password page when logging in the first time.

On Mon, Dec 18, 2017 at 4:06 PM, Ahmed Abd EL-Rahman 
<[email protected]<mailto:[email protected]>> wrote:
What’s the flexible Jabber ID? Also I have local users created on CUCM with no 
LDAP integration.

For the domain portion it’s not removed if the first login is through MRA and 
the login failed but as mentioned if I logged in thought inside network before 
the login through MRA goes smooth and login successfully but with one exception 
that IM service is not available.






Best Regards

Ahmed Abd EL-Rahman
Senior Network Engineer

From: [email protected]<mailto:[email protected]> 
[mailto:[email protected]<mailto:[email protected]>] On Behalf Of Brian Meade
Sent: Monday, December 18, 2017 11:50 PM

To: Ahmed Abd EL-Rahman 
<[email protected]<mailto:[email protected]>>
Cc: [email protected]<mailto:[email protected]>
Subject: Re: [cisco-voip] Jabber IM service Issue

Are you using flexible Jabber ID?

One thing to make sure is that first time MRA login gets rid of the domain 
portion in the username on the username/password form after entering 
username@domain in the service discovery window.

On Mon, Dec 18, 2017 at 3:43 PM, Ahmed Abd EL-Rahman 
<[email protected]<mailto:[email protected]>> wrote:
Hi Brian,

Will try what you suggested, but other than this issue I have another symptom, 
the user must use Jabber for first time from inside the network then afterwards 
he can use it from outside but if he tries the first time from outside the 
network it won’t register as all, even the login stage is not passed.

Does this point to anything ?






Best Regards

Ahmed Abd EL-Rahman
Senior Network Engineer

From: [email protected]<mailto:[email protected]> 
[mailto:[email protected]<mailto:[email protected]>] On Behalf Of Brian Meade
Sent: Monday, December 18, 2017 11:27 PM

To: Ahmed Abd EL-Rahman 
<[email protected]<mailto:[email protected]>>
Cc: [email protected]<mailto:[email protected]>
Subject: Re: [cisco-voip] Jabber IM service Issue

Try removing "inspect sip" from the global policy.  You don't want that in 
there with Expressway.  Not sure if XMPP traffic hits that as well or not.

You can also try refreshing the IM&P Servers on the Expressway-C Unified 
Communications configuration.

Enabling diagnostic logging on the Expressway-E and Expressway-C then trying to 
connect should help show what is going on as well.

On Mon, Dec 18, 2017 at 3:16 PM, Ahmed Abd EL-Rahman 
<[email protected]<mailto:[email protected]>> wrote:
Hi Brian,

Currently I’m opening all IP traffic to Expressway public IP on our Cisco ASA FW

Regarding the inspection configured here it is :
policy-map global_policy
class inspection_default
  inspect dns maximum-length 512
  inspect ftp
  inspect h323 h225
  inspect h323 ras
  inspect rsh
  inspect rtsp
  inspect esmtp
  inspect sqlnet
  inspect skinny
  inspect sunrpc
  inspect xdmcp
  inspect sip
  inspect netbios
  inspect tftp

which one could cause this issue ?






Best Regards

Ahmed Abd EL-Rahman
Senior Network Engineer

From: [email protected]<mailto:[email protected]> 
[mailto:[email protected]<mailto:[email protected]>] On Behalf Of Brian Meade
Sent: Monday, December 18, 2017 10:43 PM
To: Ahmed Abd EL-Rahman 
<[email protected]<mailto:[email protected]>>
Cc: [email protected]<mailto:[email protected]>
Subject: Re: [cisco-voip] Jabber IM service Issue

Looks like possible XMPP/TCP 5222 connection issues from the logs.  It just 
keeps reconnecting over and over again but the port is open on the Expressway 
and through the firewall.

What model firewall are you using?  You may need to disable some XMPP 
inspection/application filtering.


On Mon, Dec 18, 2017 at 2:25 PM, Ahmed Abd EL-Rahman 
<[email protected]<mailto:[email protected]>> wrote:
Dear Gents,

I have a question regarding Jabber setup, I have Jabber client working fine 
from internal network but externally it’s able to login and both phone and 
voice mail services are connected but IM service is not working while IM 
service works just fine from inside network.

Attached is Jabber client logs for this case.

So any ideas ?

Best Regards

Ahmed Abd EL-Rahman
Senior Network Engineer


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