Issues with IIS10 member in ARR 2.5.1130 farm. [Answered]RSS

4 replies

Last post Aug 28, 2019 09:56 PM by KWMcCann

  • Issues with IIS10 member in ARR 2.5.1130 farm.

    Aug 19, 2019 08:45 PM|KWMcCann|LINK

    Hi,

    I'm just looking for some Ideas to get to root cause if anyone has any.

    I have an issue trying to use an IIS 10 Server 2016 member in my existing farm.  Currently I have an server 2008 server with IIS 7.5 in the farm.  Everything works fine when using the server with IIS 7.5.  If I browse to localhost url on the reverse proxy server or to the external URL it will forward properly and get the correct response.  If I take the 2008 server offline and just make the 2016 server online, then I get a 502.3 error.   Remote clients see "

    <div id="content"> <div class="content-container">

    502 - Web server received an invalid response while acting as a gateway or proxy server. There is a problem with the page you are looking for, and it cannot be displayed. When the Web server (while acting as a gateway or proxy) contacted the upstream content server, it received an invalid response from the content server."

    and on the local server you get:

    "HTTP Error 502.3 - Bad Gateway
    The connection with the server was terminated abnormally Most likely causes:
    The CGI application did not return a valid set of HTTP errors.
    A server acting as a proxy or gateway was unable to process the request due to an error in a parent gateway."

    These tests are just trying to connect to the webroot.  If I connect directly to the server address of the 2016 server it pulls up the pages like I expect.

    Is there a compatibility issue with ARR 2.5 and IIS 10 or something that I am missing?  Does ARR/Server Farm have logging? I tried FRL but it only gave me more details about the exact same error - "Bad Gateway" - nothing about why it is a bad gateway.  It is acting like the IIS 10 is just blocking the ARR requests outright since there is nothing in the IIS 10 logs that show communication from the ARR server. 

    Thanks!

    </div> </div>
  • Rovastar Rovastar

    5417 Posts

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    Re: Issues with IIS10 member in ARR 2.5.1130 farm.

    Aug 19, 2019 10:30 PM|Rovastar|LINK

    Troubleshoot IIS in style
    https://www.leansentry.com/
  • Re: Issues with IIS10 member in ARR 2.5.1130 farm.

    Aug 20, 2019 05:30 PM|KWMcCann|LINK

    Thanks, I'll do some packet  captures and see what comes up.

  • Re: Issues with IIS10 member in ARR 2.5.1130 farm.

    Aug 21, 2019 08:41 PM|KWMcCann|LINK

    Here is the result of the packet captures:

    all communication via TCP 443

    ARR Server sends [SYN, ECN, CWR]  to member server

    Member Server responds with [SYN, ACK, ECN] 

    ARR Sends ACK 

    ARR Sends [FIN, ACK]

    Members Server sends [RST, ACK] - resetting the connection

  • Re: Issues with IIS10 member in ARR 2.5.1130 farm.

    Aug 28, 2019 09:56 PM|KWMcCann|LINK