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RTP encryption

I have configured IP phone encryption phone-to-phone. Now I would like to configure encryption phone to h323 gateways so incoming and outgoing calls are encrypted to/from the gateways. Does anyone have a link or any information about this?

Thanks,

Chris

1 ACCEPTED SOLUTION

Accepted Solutions

Re: RTP encryption

Chris, I didnt mean to say that.

H323 encryption is supported in 4.1,4.2, 5.x etc. You have to have a min. IOS version to support SRTP command under dial-peers.

http://www.cisco.com/en/US/products/ps6441/products_feature_guide09186a008068b526.html

9 REPLIES

Re: RTP encryption

Yes, its very simple. Enable encryption under the dial peers, using command

"srtp".

If using a MGCP gateway, you have to configure a few commands for MGCP to enable signalling encryption. To setup media encryption for RTP you will have to build a ipsec tunnel to callmanager (pub and sub's).

http://www.cisco.com/en/US/products/ps6441/products_feature_guide09186a008068b526.html#wp1123262

HTh

Sankar

PS: please remember to rate posts!

New Member

Re: RTP encryption

Do you know how RTP encryption works with IPCC?

Thanks,

Chris

Re: RTP encryption

Chris,

CM 4.1 doesnt support encryption on CTI devices. It seems CM 5.x has support for encryption on CTI devices, but i have never setup encryption to IPCC.

New Member

Re: RTP encryption

So this would mean any RTP traffic from IPCC wouldn't be encrypted?

Also, do you know if this is the case in CM 4.2?

Thanks,

Chris

Re: RTP encryption

Looks like its not supported in 4.2 as well.

http://www.cisco.com/univercd/cc/td/doc/product/voice/c_callmg/4_2/sec_vir/ae/sec423/secuview.htm

Hopefully this is roadmapped for 4.x train in future.

New Member

Re: RTP encryption

So the H323 encryption is only supported in CM5.0 and above?????

Thanks,

Chris

Re: RTP encryption

Chris, I didnt mean to say that.

H323 encryption is supported in 4.1,4.2, 5.x etc. You have to have a min. IOS version to support SRTP command under dial-peers.

http://www.cisco.com/en/US/products/ps6441/products_feature_guide09186a008068b526.html

Re: RTP encryption

I would discourage srtp/encryption, too many things won't work or have caveats. Give it some time to work out the issues.

New Member

Re: RTP encryption

Can you tell me some of the things that don't work or have caveats?

Thanks,

Chris

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