Hi,

It looks like your server name is set to "https://example.com"; in the
Review Board General Settings page. SAML requires the server name to be set
correctly to whatever domain your IdP is expecting.

David

On Mon, Feb 26, 2024 at 9:23 AM Enzo <enzo.gaut...@gmail.com> wrote:

> Hello!
>
> I was wondering if anyone had more precise instructions on configuring
> Sign-on with SAML for a web application with Azure AD (Now Entra ID).
>
> I have created an enterprise application and enabled SAML. However, when I
> try to use "Log in with SAML" on the application, I receive a 502 Bad
> Gateway error code.
>
> In the Docker-compose logs, I can find the following error:
>
>
>    - nginx_1        | 172.23.0.6 - - [26/Feb/2024:05:08:57 +0000] "GET
>    /jsi18n/ HTTP/1.1" 304 0 "https://example.com/account/login/?next=/";
>    "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like
>    Gecko) Chrome/121.0.0.0 Safari/537.36 Edg/121.0.0.0" "125.102.190.34"
>    - reviewboard_1  | [2024-02-26 05:08:57 +0000] [2421] [DEBUG] GET
>    /account/sso/saml/login/
>    - nginx_1        | 172.23.0.6 - - [26/Feb/2024:05:08:57 +0000] "GET
>    /account/sso/saml/login/?next=/ HTTP/1.1" 302 0 "
>    https://example.com/account/login/?next=/"; "Mozilla/5.0 (Windows NT
>    10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/
>    121.0.0.0 Safari/537.36 Edg/121.0.0.0" "125.102.190.34"
>    - reviewboard_1  | [2024-02-26 05:08:57 +0000] [2421] [DEBUG] Closing
>    connection.
>    - reviewboard_1  | [2024-02-26 05:08:57 +0000] [2421] [DEBUG] GET
>    /health/
>    - reviewboard_1  | [2024-02-26 05:08:57 +0000] [2421] [DEBUG] Closing
>    connection.
>    - reviewboard_1  | [2024-02-26 05:08:59 +0000] [2309] [DEBUG] POST
>    /account/sso/saml/acs/
>    - reviewboard_1  | [2024-02-26 05:08:59 +0000] [20] [ERROR] Worker
>    (pid:2309) was sent code 139!
>    - nginx_1        | 2024/02/26 05:08:59 [error] 35#35: *136 upstream
>    prematurely closed connection while reading response header from upstream,
>    client: 172.23.0.6, server: example.com, request: "POST
>    /account/sso/saml/acs/ HTTP/1.1", upstream: "
>    http://172.23.0.5:8080/account/sso/saml/acs/";, host: "example.com",
>    referrer: "https://login.microsoftonline.com/";
>    - nginx_1        | 172.23.0.6 - - [26/Feb/2024:05:08:59 +0000] "POST
>    /account/sso/saml/acs/ HTTP/1.1" 502 559 "
>    https://login.microsoftonline.com/"; "Mozilla/5.0 (Windows NT 10.0;
>    Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0
>    Safari/537.36 Edg/121.0.0.0" "125.102.190.34"
>    - reviewboard_1  | [2024-02-26 05:08:59 +0000] [2437] [INFO] Booting
>    worker with pid: 2437
>    - reviewboard_1  | [2024-02-26 05:09:28 +0000] [2421] [DEBUG] GET
>    /health/
>    - reviewboard_1  | [2024-02-26 05:09:28 +0000] [2421] [DEBUG] Closing
>    connection.
>
>
> Regarding authentication settings, I picked these options:
>
>
>    - Signature algorithm: DSA-SHA1
>    - Digest algorithm: SHA1
>    - NameID format: Email address
>    - Custom email attribute: user.mail
>    - Custom first name attribute: user.firstname
>    - Custom last name attribute: user.lastname
>    - Custom full name attribute: user.fullname
>
>
> Additionally, I'm using Caddy as a reverse proxy within the same
> Docker-compose file, which handles HTTPS.
>
> Thanks in advance!
>
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