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Not able to render captive portal page on Edge Client

Edge client is not able to render captive portal page. I see the following in edge client logs:

0,2019-01-15,15:58:58:581,Standalone,5796,15560,Captive portal detected
48,2019-01-15,15:58:58:605,Standalone,5796,15560,URL, http://cdn.f5.com/product/avail.txt
1,2019-01-15,15:58:58:757,Standalone,5796,15560,Run refresh for navigate error, 0xffffffff800c0005, http://cdn.f5.com/product/avail.txt
48,2019-01-15,15:58:58:773,Standalone,5796,15560,URL, res://ieframe.dll/dnserrordiagoff.htm#http://cdn.f5.com/product/avail.txt
48,2019-01-15,15:58:59:073,Standalone,5796,15560,URL, http://cdn.f5.com/product/avail.txt
48,2019-01-15,15:58:59:157,Standalone,5796,15560,Document received from URL, http://cdn.f5.com/product/avail.txt
48,2019-01-15,15:58:59:169,Standalone,5796,15560,Captive portal content detected. (URL), http://cdn.f5.com/product/avail.txt
48,2019-01-15,15:59:16:121,Standalone,5796,15560,HTTP status), Download failed, -1, 302
48,2019-01-15,15:59:16:125,Standalone,5796,15560,Prompt for cancelling captive portal window
48,2019-01-15,15:59:17:528,Standalone,5796,15560,URL, about:blank
48,2019-01-15,15:59:17:544,Standalone,5796,15560,URL, about:blank
48,2019-01-15,15:59:17:552,Standalone,5796,15560,Document received from URL, about:blank
48,2019-01-15,15:59:17:556,Standalone,5796,15560,IsWindowVisible - no need to track captive portal detection URL if captive portal windows is not open.
48,2019-01-15,16:04:42:776,Standalone,12692,16148,Detecting captive portal
48,2019-01-15,16:04:43:010,Standalone,12692,16148,HTTP status), Download failed, -1, 302
0,2019-01-15,16:04:43:026,Standalone,12692,16148,Captive portal detected
48,2019-01-15,16:04:43:041,Standalone,12692,16148,URL, http://cdn.f5.com/product/avail.txt
1,2019-01-15,16:04:43:088,Standalone,12692,16148,Run refresh for navigate error, 0xffffffff800c0005, http://cdn.f5.com/product/avail.txt
48,2019-01-15,16:04:43:104,Standalone,12692,16148,URL, res://ieframe.dll/dnserrordiagoff.htm#http://cdn.f5.com/product/avail.txt
48,2019-01-15,16:04:43:291,Standalone,12692,16148,URL, http://cdn.f5.com/product/avail.txt
48,2019-01-15,16:04:43:354,Standalone,12692,16148,Captive portal content detected. (URL), http://cdn.f5.com/product/avail.txt
48,2019-01-15,16:04:43:354,Standalone,12692,16148,Document received from URL, http://cdn.f5.com/product/avail.txt
48,2019-01-15,16:05:03:778,Standalone,12692,16148,URL, http://cdn.f5.com/product/avail.txt
1,2019-01-15,16:05:03:825,Standalone,12692,16148,Run refresh for navigate error, 0xffffffff800c0005, http://10.10.10.254:9997/user/guest_tou.asp?origurl=http%3a%2f%2fcdn%2ef5%2ecom%2fproduct%2favail%2etxt&langname=en%5fUS&logo=%2flogo%5f1
48,2019-01-15,16:05:03:856,Standalone,12692,16148,URL, res://ieframe.dll/dnserrordiagoff.htm#http://cdn.f5.com/product/avail.txt
48,2019-01-15,16:05:03:887,Standalone,12692,16148,URL, http://cdn.f5.com/product/avail.txt
48,2019-01-15,16:05:03:903,Standalone,12692,16148,Document received from URL, http://cdn.f5.com/product/avail.txt
48,2019-01-15,16:05:03:903,Standalone,12692,16148,Captive portal content detected. (URL), http://cdn.f5.com/product/avail.txt
48,2019-01-15,16:06:55:047,Standalone,12692,16148,URL, http://10.10.10.254:9997/user/guest_tou.asp?origurl=http%3a%2f%2fcdn%2ef5%2ecom%2fproduct%2favail%2etxt&langname=en%5fUS&logo=%2flogo%5f1
1,2019-01-15,16:06:55:063,Standalone,12692,16148,Run refresh for navigate error, 0xffffffff800c0005, http://10.10.10.254:9997/user/guest_tou.asp?origurl=http%3a%2f%2fcdn%2ef5%2ecom%2fproduct%2favail%2etxt&langname=en%5fUS&logo=%2flogo%5f1
48,2019-01-15,16:06:55:078,Standalone,12692,16148,URL, res://ieframe.dll/dnserrordiagoff.htm#http://cdn.f5.com/product/avail.txt
48,2019-01-15,16:06:55:110,Standalone,12692,16148,URL, http://cdn.f5.com/product/avail.txt
48,2019-01-15,16:06:55:125,Standalone,12692,16148,Document received from URL, http://cdn.f5.com/product/avail.txt
48,2019-01-15,16:06:55:125,Standalone,12692,16148,Captive portal content detected. (URL), http://cdn.f5.com/product/avail.txt
48,2019-01-15,16:06:57:751,Standalone,12692,16148,URL, about:blank
48,2019-01-15,16:06:57:766,Standalone,12692,16148,URL, about:blank
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Comment made 1 month ago by DevBabu 662

When I take capture I see the following:

GET /product/avail.txt HTTP/1.1
Host: cdn.f5.com
User-Agent: BIG-IP Edge Client
Connection: Close
Cache-Control: no-cache

HTTP/1.0 302 Redirect
Server: GoAhead-Webs
Date: Tue Jan 15 17:19:07 2019
Pragma: no-cache
Cache-Control: no-cache, no-store
Content-Type: text/html
Location: http://10.10.10.254:9997/user/guest_tou.asp?origurl=http%3a%2f%2fcdn%2ef5%2ecom%2fproduct%2favail%2etxt&langname=en%5fUS&logo=%2flogo%5f1

So, I get a redirect but I don't see edge client sending request to the redirect site in the capture. Though, I see the client is trying to do SSL handshake to some Public IP.

When I try to open the redirect page in my browser, I notice though it is HTTP I get SSL handshkae warning since, it is presenting a cert that is not trusted and once I accept i get the captive portal page.

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