My understanding of how this works is that for external traffic, your ICA traffic between the client and CAG is encrypted. The strength depends on the cert you purchase. If you add RSA then of course you have two factor authentication. You can use another cert to encrypt the traffic between WI and Presentation server to secure the XML traffic. By turning on ICA encryption you are essentially protecting the internal ICA traffic. Anyone using certs to secure their XML traffic between WI and Presentation server if both are in internal network? Mike Original Message: ----------------- From: Steve Greenberg steveg@xxxxxxxxxxxxxx Date: Thu, 10 Jul 2008 07:05:22 -0700 To: thin@xxxxxxxxxxxxx Subject: [THIN] Re: ICA Client Encryption Yes, Briforum rocked!! If all external connections are AG then the outside is "protected", the question is how important is it to encrypt traffic on the inside. Keep in mind that ICA is not your biggest internal exposure, the html and xml stuff between WI, AG and the XML service is actually more vulnerable. To secure this stuff you need certs between these boxes. As far as 128 ICA encryption I would always turn it on, the few % of CPU it might take is worth knowing that the ICA traffic is secure as it travels around, also consider encrypting authentication in any scenario . Steve Greenberg Thin Client Computing 34522 N. Scottsdale Rd D8453 Scottsdale, AZ 85266 (602) 432-8649 www.thinclient.net steveg@xxxxxxxxxxxxxx _____ From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Jensen, Jay Sent: Thursday, July 10, 2008 5:58 AM To: thin@xxxxxxxxxxxxx Subject: [THIN] ICA Client Encryption Hello gang, BriForum 2008 at Chicago Navy's Pier rocked!! What a relaxed and awesome venue! My new boss wants to put the ICA (XenApp Client 10.20) encryption level from our previous 128-bit encryption to Basic encryption when we migrate to our new XenApp 4.5 Farm. In the past we have always used 128-bit encryption due to security to reduce any chance a hacker could intercept our ICA TCP/IP packets and jeopardize our Citrix Farm / Corporate data. We are an international business with over a 250-server farm so it is imperative we get it right! We use CSG today for our External Citrix connection and we are in the process of migrating to Access Gateway both internally and externally. What is everyone else using for ICA client encryption and/or can you point me to a whitepaper or recommendation site what is the best practice on ICA Client encryption? I guess I am old school and maybe I am being stupid in recommending 128-bit encryption on the ICA client and I would like one of experts in this list to guide me in the rigiht direction and ease my fears that Basic ICA encryption is what should be used! Thank You in advance for your assistance. Jay Jensen Citrix Team Americas Sales and Distribution IT Trane Commercial Systems Ingersoll Rand 3600 Pammel Creek Road, La Crosse, WI 54601 Tel: 608-787-4619 E-mail: jjensen@xxxxxxxxx www.trane.com The information in this message is the property of Ingersoll Rand Company. This message is intended only for the use of the addressee named above and may contain legally privileged and/or confidential information. If you are not the intended recipient of this message, you are hereby notified that any use, dissemination, distribution or copying of this message is strictly prohibited. If you receive this message in error, please notify us immediately by telephone or return e-mail and delete the message, all copies thereof and any attachments. We thank you for your cooperation. -------------------------------------------------------------------- mail2web.com ? Enhanced email for the mobile individual based on Microsoft® Exchange - http://link.mail2web.com/Personal/EnhancedEmail ************************************************ For Archives, RSS, to Unsubscribe, Subscribe or set Digest or Vacation mode use the below link: //www.freelists.org/list/thin NEW! Follow Thin List on Twitter! http://twitter.com/thinlist Thin List discussion is now available in blog format at: http://thinmaillist.blogspot.com HOT! Thinlist MOBILE Feed! http://thinlist.net/mobile Thinlist quick pick http://thinlist.net ************************************************