Hi,
I have tried using your nginx config on my reverse proxy and still seem to be coming across the error where my browser is returning a 502 bad gateway when clicking on the login button (that should pop up a list of certificates to choose from). It's almost as if something is getting blocked and Gluu can't get access to the browsers certificates. Again from the logs within Gluu the only error I am receiving is this one
```
[Mon Jun 05 10:28:58.545075 2017] [ssl:error] [pid 21763] [client 192.168.XX.XX:48140] AH02261: Re-negotiation handshake failed: Not accepted by client!?, referer: https://my.gluu.idp/oxauth/auth/cert/login
```
When accessing the page and clicking the login button I also get this result in the oxauth log file wonder if you can spot anything that may be going on in here?
```
2017-06-05 10:53:45,809 DEBUG [qtp1395089624-345] [xdi.oxauth.authorize.ws.rs.AuthorizeRestWebServiceImpl] (AuthorizeRestWebServiceImpl.java:147) - Attempting to request authorization: responseType = code id_token, clientId = @!1C46.38AE.D077.C150!0001!849C.7440!0008!3604.E9CB, scope = openid profile email user_name, redirectUri = https://my.gluu.idp/identity/authentication/authcode, nonce = nonce, state = null, request = null, isSecure = true, requestSessionState = null, sessionState = null
2017-06-05 10:53:45,810 DEBUG [qtp1395089624-345] [xdi.oxauth.authorize.ws.rs.AuthorizeRestWebServiceImpl] (AuthorizeRestWebServiceImpl.java:153) - Attempting to request authorization: acrValues = cert, amrValues = null, originHeaders = null, codeChallenge = null, codeChallengeMethod = null
2017-06-05 10:53:45,817 DEBUG [qtp1395089624-345] [org.xdi.oxauth.service.ClientService] (ClientService.java:128) - Found 1 entries for client id = @!1C46.38AE.D077.C150!0001!849C.7440!0008!3604.E9CB
2017-06-05 10:53:45,818 DEBUG [qtp1395089624-345] [org.xdi.oxauth.model.authorize.ScopeChecker] (ScopeChecker.java:43) - Checking scopes policy for: openid profile email user_name
2017-06-05 10:53:45,828 DEBUG [qtp1395089624-345] [org.xdi.oxauth.model.authorize.ScopeChecker] (ScopeChecker.java:63) - Granted scopes: [openid, user_name, profile, email]
2017-06-05 10:53:45,829 DEBUG [qtp1395089624-345] [org.xdi.oxauth.service.ClientService] (ClientService.java:128) - Found 1 entries for client id = @!1C46.38AE.D077.C150!0001!849C.7440!0008!3604.E9CB
2017-06-05 10:53:45,830 DEBUG [qtp1395089624-345] [org.xdi.oxauth.service.RedirectionUriService] (RedirectionUriService.java:80) - Validating redirection URI: clientIdentifier = @!1C46.38AE.D077.C150!0001!849C.7440!0008!3604.E9CB, redirectionUri = https://my.gluu.idp/identity/authentication/authcode, found = 4
2017-06-05 10:53:45,830 DEBUG [qtp1395089624-345] [org.xdi.oxauth.service.RedirectionUriService] (RedirectionUriService.java:86) - Comparing https://my.gluu.idp/identity/scim/auth == https://my.gluu.idp/identity/authentication/authcode
2017-06-05 10:53:45,831 DEBUG [qtp1395089624-345] [org.xdi.oxauth.service.RedirectionUriService] (RedirectionUriService.java:86) - Comparing https://my.gluu.idp/identity/authentication/authcode == https://my.gluu.idp/identity/authentication/authcode
2017-06-05 10:53:45,860 DEBUG [qtp1395089624-156] [org.xdi.oxauth.service.ClientService] (ClientService.java:128) - Found 1 entries for client id = @!1C46.38AE.D077.C150!0001!849C.7440!0008!3604.E9CB
2017-06-05 10:53:45,875 DEBUG [qtp1395089624-156] [org.xdi.oxauth.service.external.ExternalAuthenticationService] (ExternalAuthenticationService.java:247) - Executing python 'getPageForStep' authenticator method
2017-06-05 10:53:45,944 DEBUG [qtp1395089624-322] [org.xdi.oxauth.service.external.ExternalAuthenticationService] (ExternalAuthenticationService.java:337) - Validating acr_values: 'cert'
2017-06-05 10:53:45,944 DEBUG [qtp1395089624-322] [org.xdi.oxauth.service.external.ExternalAuthenticationService] (ExternalAuthenticationService.java:132) - Executing python 'isValidAuthenticationMethod' authenticator method
2017-06-05 10:53:45,945 DEBUG [qtp1395089624-322] [org.xdi.oxauth.service.external.ExternalAuthenticationService] (ExternalAuthenticationService.java:221) - Executing python 'prepareForStep' authenticator method
2017-06-05 10:53:45,946 DEBUG [qtp1395089624-322] [org.xdi.oxauth.service.external.ExternalAuthenticationService] (ExternalAuthenticationService.java:234) - Executing python 'getExtraParametersForStep' authenticator method
2017-06-05 10:53:45,956 DEBUG [qtp1395089624-322] [org.xdi.oxauth.service.ClientService] (ClientService.java:128) - Found 1 entries for client id = @!1C46.38AE.D077.C150!0001!849C.7440!0008!3604.E9CB
2017-06-05 10:53:45,957 DEBUG [qtp1395089624-322] [org.xdi.oxauth.service.ClientService] (ClientService.java:128) - Found 1 entries for client id = @!1C46.38AE.D077.C150!0001!849C.7440!0008!3604.E9CB
2017-06-05 10:53:45,958 DEBUG [qtp1395089624-322] [org.xdi.oxauth.service.ClientService] (ClientService.java:128) - Found 1 entries for client id = @!1C46.38AE.D077.C150!0001!849C.7440!0008!3604.E9CB
2017-06-05 10:53:53,541 DEBUG [qtp1395089624-161] [org.xdi.oxauth.service.external.ExternalAuthenticationService] (ExternalAuthenticationService.java:171) - Executing python 'authenticate' authenticator method
2017-06-05 10:53:53,543 DEBUG [qtp1395089624-161] [org.xdi.oxauth.auth.Authenticator] (Authenticator.java:233) - Authentication result for user 'null'. auth_step: '1', result: 'true', credentials: '1,933,581,664'
2017-06-05 10:53:53,543 DEBUG [qtp1395089624-161] [org.xdi.oxauth.service.external.ExternalAuthenticationService] (ExternalAuthenticationService.java:260) - Executing python 'getApiVersion' authenticator method
2017-06-05 10:53:53,544 DEBUG [qtp1395089624-161] [org.xdi.oxauth.service.external.ExternalAuthenticationService] (ExternalAuthenticationService.java:234) - Executing python 'getExtraParametersForStep' authenticator method
2017-06-05 10:53:53,545 DEBUG [qtp1395089624-161] [org.xdi.oxauth.service.external.ExternalAuthenticationService] (ExternalAuthenticationService.java:158) - Executing python 'getCountAuthenticationSteps' authenticator method
2017-06-05 10:53:53,549 DEBUG [qtp1395089624-161] [org.xdi.oxauth.service.external.ExternalAuthenticationService] (ExternalAuthenticationService.java:247) - Executing python 'getPageForStep' authenticator method
2017-06-05 10:53:53,550 DEBUG [qtp1395089624-161] [org.xdi.oxauth.service.external.ExternalAuthenticationService] (ExternalAuthenticationService.java:234) - Executing python 'getExtraParametersForStep' authenticator method
```
Any help or ideas would be great thanks.