Create README.md

Draytek/README.md

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+# Draytek External Captive Portal
+
+This portal has been tested on the following hardware:
+
+```
+Vendor: Draytek
+Device: Vigor2862
+Redirect Method: GET
+```
+
+Redirecting client to captive portal:-
+
+URL format: http://<URL.of.external.portal>/login.php?apmac=<AP MAC>&clientmac=<Client MAC>&loginurl=<URL to which username password should be sent>&target=<URL which client was accessing>
+
+Redirecting client from captive portal to router (for authorization):-
+
+URL format: http://portal.draytek.com:8001/cgi-bin/wifilogin.cgi?username=<username>&password=<password>
+
+Apache Access Log (on captive portal server):-
+```
+apmac=00-1D-AA-09-44-10&client_mac=D8-8F-76-6D-A8-7B&loginurl=http://portal.draytek.com:8001/cgi-bin/wifilogin.cgi&target=http://captive.apple.com/hotspot-detect.html HTTP/1.0" 404 379 "-" "CaptiveNetworkSupport-355.270.2 wispr"
+```
+RADIUS Access-Request Packet (in FreeRADIUS debug):-
+```
+User-Name = "draytek"
+User-Password = "draytek"
+Called-Station-Id = "00-1D-AA-09-44-10"
+Calling-Station-Id = "D8-8F-76-6D-A8-7B"
+NAS-IP-Address = <NAS IP Address>
+Service-Type = Authenticate-Only
+```
+Notes: portal.draytek.com is the address of the Draytek router