Recent Discussions
IIS app pool in-memory cache miss
Hi, Our IIS server runs on windows 2016 servers, recently we are experiencing frequent miss from in-memory cache, and instead of connecting to NCache which is our cache solution, it is sending request to database. After lots of debug we still could not identify the issue here. But as a best practice we are going to change some setting. But, one suggestion is to change max worker count from 4 to 1. Will that impact our performance? How much will it be effective to bring that value to 1 from 4, in terms of single worker cache miss issue occurrences?
Binding a website that already uses required port.
Hello devs, I hope you are having a great day. I have already developed a website that runs on port 8081 in localhost. When i start a new site in IIS and set 8081 as the port in the bind section(which is already open via the website), I receive the error that the port is already in use. My question is how can I connect my domain to the local host and specified port in IIS or any other application. The IIS has a default website(which brings the welcome page up) and by using that the connection between domain and server is assured(name servers are set and ready). If only the IIS could relay all traffic to the localhost and port 8081 of the server, my problem would be solved. I have attached some pictures for better understanding. Thank you in advance Best wishes, Sahand -As you see in this picture my website has started and working in the specified IP and port. ,-In this picture while binding the new website to port 8081 the IIS refuses to start the site with this error(port 8081 is already in use by my website).
IIS SERVER_PROTOCOL never returns HTTP2 (HTTP/2)
Using Windows Server 2025, I can not get the "SERVER_PROTOCOL" response header to return anything other than HTTP/1.1: For example, a simple classic ASP page with: <% Response.Write(Request.ServerVariables("SERVER_PROTOCOL")) %> Always returns "HTTP/1.1". I have verified the page is served via HTTP2 via developer tools in the browser and it's even upgraded to HTTP3/QUIC later on in the response sucessfully.Error executing JScript
I switched from Windows Server 2022 to 2025. I migrated all my domains and it works fine, but with an error: I can't run a script like "<SCRIPT Language="JScript" RUNAT=SERVER>" because it gives me a 500 error. If I go to https://www.vidauna.com/aaa.asp, there's an example from Microsoft, and if the page is refreshed, it gives a 500 error (once yes, once no). Looking for the reason for the error, I found it's because on another of my pages on the same domain I have set the string: "Session.Timeout = 20." If I create a new subdomain with just the example, it works fine, but without the example, I put: <% Session.Timeout = 20 %> It starts doing the same thing. When I refresh the page (F5), it gives a 500 error, and if I refresh it again, it appears fine, and so on. I've been searching for a solution for almost a month and can't find it. I can't have the page that uses JScript on the domain because it doesn't work (it worked fine on the previous server), and I'm trying to find the problem with the example. What I think is that I need to configure something in Windows Server 2025's IIS to prevent this error, but I don't know what it is. I hope someone knows the solution to this problem. Thank you. I'm Spanish, and the text was translated using Google Translate. The content of the aaa.asp example is: <%@ Language= "VBScript" %> <HTML> <BODY> <!-- Call the JScript procedure from within VBScript--> <% call printDate() %> <!--Call the VBScript procedure from within VBScrip--> <% Echo %> <BR> </BODY> </HTML> <%Sub Echo%> <!--Note: this will not output anything unless the page is called with a query string like https://localhost/test.asp?x=1%20have&y=a%20cunning&z=plan --> <% Response.Write "<TABLE BORDER=1>" & _ "<TR><TH>Name</TH><TH>Value</TH></TR>" Set objQueryString = Request.QueryString For Each strSelection In objQueryString Response.Write "<TR><TD>" & strSelection & "</TD><TD>" & _ objQueryString(strSelection) & "</TD></TR>" Next Response.Write "</TABLE>" End Sub %> <SCRIPT Language= "JScript" RUNAT=SERVER> function printDate() { var x x = new Date() Response.Write(x.toString()) Response.Write("<BR>") } </SCRIPT> The error is: Información detallada de error: Módulo IsapiModule Notificación ExecuteRequestHandler Controlador ASPClassic Código de error 0x00000000 Dirección URL solicitada https://www.vidauna.com:443/aaa.asp Ruta de acceso física ...\aaa.asp Método de inicio de sesión Anónimo Usuario de inicio de sesión Anónimo
ARR 3.0 Route to Server Farm Missing
I am encountering a persistent and frustrating issue with Application Request Routing (ARR) 3.0 on my Windows system (details below). I have successfully installed ARR 3.0, but the crucial "Route to Server Farm..." option is consistently missing from the "Action type:" dropdown when I edit or create a URL Rewrite rule in IIS Manager. I have spent a significant amount of time troubleshooting this, and I am hoping someone with more experience might be able to shed some light on what I am missing or what might be going wrong. Here is a detailed breakdown of my situation and the steps I have taken: System Information: Operating System: Windows 10 Pro 64-bit IIS Version: 10.0.19041.1 Problem Description: The "Route to Server Farm..." option is not present in the "Action type:" dropdown when configuring the "Action" of a URL Rewrite rule for my "Default Web Site" (and any other site I've tested). My goal is to use ARR as a reverse proxy to forward requests to a backend Nginx server (running on the same machine or a different one - please specify if relevant). I have created a Server Farm named "NginxFarm" (or whatever you named it) in IIS Manager. 3. Steps Taken So Far (in chronological order as best as I can recall): Initial ARR Installation: I downloaded and successfully ran the ARR 3.0 installer (requestRouter_amd64 (1).exe). The installation completed without any apparent errors. Verification of Modules: In IIS Manager, at the server level, under "Modules," I can see "ApplicationRequestRouting" listed with "Module Type: Native" and "Enabled: True". However, "RequestRouter" was initially missing. Manual Registration Attempts: I tried to register RequestRouter.dll (located in C:\Program Files (x86)\IIS\Application Request Routing\) using regsvr32, but it reported that the entry-point DllRegisterServer was not found. I tried using iisreg.exe (from C:\Windows\System32\inetsrv\) to register RequestRouter.dll, but the command was not recognized. I looked for gacutil.exe to register the DLL in the Global Assembly Cache but could not find it (Windows SDK is not installed). Manual Module Addition (Server Level Configuration Editor): I used the Configuration Editor at the server level to navigate to system.webServer -> modules. I found "ApplicationRequestRouting" listed, but the "type" attribute was empty. I set it to Microsoft.Web.Arr.ApplicationRequestRoutingModule, Microsoft.Web.Arr. "RequestRouter" was missing, so I added a new module with the name "RequestRouter" and the type Microsoft.Web.Arr.RequestRouterModule, Microsoft.Web.Arr. I applied these changes and restarted the entire computer. Checking "Configure Native Modules..." (Default Web Site): I checked the "Configure Native Modules..." option for my "Default Web Site" under "Modules," but "RequestRouter" was not listed there. Examination of applicationHost.config: I located C:\Windows\System32\inetsrv\config\applicationHost.config and made a backup. In the <globalModules> section, I found entries for ARRHelper, RequestRouter (pointing to C:\Program Files (x86)\IIS\Application Request Routing\requestRouter.dll), and ApplicationRequestRouting (which I changed to also point to C:\Program Files (x86)\IIS\Application Request Routing\requestRouter.dll to ensure consistency). The <modules> section within <system.webServer> at the server level now correctly lists ApplicationRequestRouting and RequestRouter with the type attributes set. IIS Logs: I examined the IIS logs in %SystemDrive%\inetpub\logs\LogFiles\ but did not find any specific errors related to the loading or initialization of the ARR modules. The logs primarily show 404 errors for the root and favicon.ico. Full System Restarts: I have restarted my computer multiple times after installing ARR and making configuration changes. Clean Re-installation of ARR 3.0: I uninstalled ARR 3.0 through "Programs and Features," restarted my computer, re-downloaded and re-installed ARR 3.0 as administrator, and restarted again. The issue persists. Server Level Rewrite Configuration: I checked system.webServer -> rewrite -> providers and rules at the server level in the Configuration Editor, and both had zero items. 4. Current Status: "ApplicationRequestRouting" is listed as a Native module and enabled at the server level. "RequestRouter" is listed as a Native module with the correct type at the server level. Neither "RequestRouter" nor "ApplicationRequestRouting" appears in the "Configure Native Modules..." list for the "Default Web Site". The "Route to Server Farm..." option is still missing from the "Action type:" dropdown in the URL Rewrite rule editor. 5. Questions for the Community: Has anyone else encountered this specific issue with ARR 3.0 on a similar system configuration? Are there any known compatibility issues between ARR 3.0 and specific versions of Windows or other IIS components? Are there any prerequisites for ARR 3.0 that might not be obvious or automatically installed? Are there any specific IIS features that need to be enabled for "Route to Server Farm..." to appear? (I have the core Web Server role and Management Tools installed). Could there be an issue with the permissions on the ARR installation directories or the DLL files? Are there any specific entries I should be looking for in the Windows Event Viewer (Application or System logs) that might indicate a problem with ARR? Is there a specific order in which ARR components need to be installed or configured? Are there any alternative methods to enable or verify the functionality of the RequestRouter module? I am at a loss and would greatly appreciate any guidance or suggestions you might have. Thank you in advance for your time and assistance.Web site was working then my public IP address changed due to a move
I have update my public IP address here: And I have created a https certificate for the find-a-tradie.com.au web site using 'Certify the Web' windows software. All good that far. But I can't access https://www.find-a-tradie.com.au in chrome. So what settings in IIS do I need to modify to make it work again?
IIS URL redirect
I want to enable access to the same website from two different URLs. The website is hosted for internal use. The internal URL is internal.example.com But now I want to open this website to the public using external.example.com There is no option to add a new building to this website. How can I enable URL redirect on IIS to achieve this? I want to access all the internal website pages from an outside URL without any issues. Is there an option to achieve this on IIS?IIS port problem
Hi everybody! My company would like to use MantisBT and i got the task to setup mantis but i have some problem with it. I would like to run MantisBT on port 443 (https) but one application already use this port. (This application isn't based on IIS). The server which should run MantisBT has two network cards and using Windows Server 2019. The first (x.x.x.1) is used by the necessary monitoring application, the other one (x.x.x.2) should used by MantisBT. The problem is if i bind x.x.x.2 IP to port 443 than i got an error message: The process cannot access the file because: it is being used by another process.(Exception from HRESULT: 0x80070020) Any idea what should i do? Can you give me step by step advice? Thank you. Have a nice day! PN
Update to de lastest version of IIS
HI! In the company I work for, we have many servers with several versions of Windows Server (from 2012 R2 to 2022) and some of them have the IIS role installed. I have to check if IIS is updated in every server, so I'd like to know if you can help me whit the following: How can I Update IIS to te lastest version? I searched the web and looks like the only way to upgrade it is using WIndows Update, but in my organisation it is disabled by policy. I was searching for information about the different versions of IIS in Microsoft learn and all I found was this: https://learn.microsoft.com/es-es/lifecycle/products/internet-information-services-iis. I understand that there are several versions of IIS 10, some of the available only for Windows server 2019 and others only for Win Server 2022. Where can I find that info? Thank you.How to integrate with Angular ngCspNonce`
Good Day I'm trying to set up CSP Nonce support with Angular, using IIS on Windows-based Azure App Service Plans. I can't switch to a different web server due to other requirements, so I'm stuck with IIS. What I need to configure is a replacement for 'nonce-random_nonce_value' In Apache or Nginx, this is trivial, but on IIS how do I tell it to replace "nonce-random_nonce_value" with "nonce-<blah-long-hash>". ThanksNeed Help Understanding Why .NET SDK and Runtime Were Required for IIS Hosting of ASP.NET
I'm hosting an ASP.NET Core application (v6.0.33) on an AWS virtual machine with IIS. I installed the .NET Hosting Bundle matching the application’s version. After verifying the website runs fine with dotnet run, I encountered an "HTTP Error 500.30 - ASP.NET Core App Failed to Start" when trying to access it via IIS. After troubleshooting extensively—including checking various threads on Stack Overflow, GitHub, and Microsoft forums—I found this article https://www.quickpickdeal.com/coding/http-error-500-30-asp-net-core-app-failed-to-start-with-iis-a-real-world-solut that suggested installing not only the Hosting Bundle but also the .NET SDK and Runtime. Surprisingly, this approach worked. My question is: Why did I need all three components (Hosting Bundle, SDK, and Runtime) to get this application working in IIS? I expected the Hosting Bundle alone to be sufficient for deployment. Could there be a dependency that IIS requires that isn't covered by the Hosting Bundle?
How to Host a Rails App on IIS: Seeking a Simple Approach
Hello, I’m having trouble hosting my Rails app on IIS (Windows Server 2019). Unfortunately, I don’t have the option to choose a different server since the app will be hosted on an on-premise server, which also runs other applications on IIS (Windows Server 2019). I’ve read numerous discussions on this topic, and the most common feedback is that “it’s painful.” However, I haven’t been able to find a clear, step-by-step guide or solution. So far, I’ve come across the following options: Hosting with a reverse proxy Hosting with WSL Hosting with Docker However, I’m looking for a more traditional approach to hosting the app, similar to how one would typically host an application in other languages. As a developer with limited experience in server management, I’m not sure where to start. If anyone has any tips, tutorials, or guidance, I would greatly appreciate your help!
IIS issue - apsnetcore.dll not found
Hi, I am working on upgrading a server from 2012 to 2022 (on AWS). I have installed a fresh 2022 instance and have sued webdeploy to copy the entire IIS configuration from the 2012 server to the 2022 server. To try to further bring the server up to date, the 2012 server is running .Net 2.x and on 2022 I have installed .Net 8.x When I launch the 2022 server IIS runs but my websites won't come up - I keep getting a 503 error. When I look in the Event Viewer the error message I see is "apsnetcore.dll not found". I have spent some time trying to identify how to rectify this but so far have not been successful. Could anyone please give me any suggestions to try to find a fix ? TIAChunked data through IIS
I am trying to chunk data through iis but it is not happning I tried <rewrite> <outboundRules> <!-- <rule name="Remove Content-Length" stopProcessing="false"> <match serverVariable="RESPONSE_Content-Length" pattern=".*" /> <action type="Rewrite" value="0" /> </rule> --> <!-- <rule name="Add Chunked Encoding" patternSyntax="ECMAScript"> <match serverVariable="RESPONSE_Transfer-Encoding" pattern=".*" /> <action type="Rewrite" value="chunked" /> </rule> --> and <rule name="Transfer-Encoding chunked"> <serverVariables> <set name="RESPONSE_Content-Length" value="" /> <set name="RESPONSE_Transfer-Encoding" value="chunked" /> </serverVariables> <action type="CustomResponse" statusCode="200" /> </rule> and <httpProtocol allowKeepAlive="false"> <customHeaders> <!-- <remove name="Content-Length" /> <add name="Transfer-Encoding" value="chunked" /> --> <add name="X-Content-Type-Options" value="nosniff" /> </customHeaders> </httpProtocol> in these cases in response header transfer-encoding is coming as chunked but response body is not coming
Temporary error 403 on images
I've been having the following problem for some time now. Some images are repeatedly not displayed on the website (error 403). These are also linked as an image. If I click on the link, they appear without any problems. When I refresh the page with cache turned off, different images are affected. Does anyone have an idea? for instance http://www.salzlandkreis.de/bildungkultur/ringheiligtum-poemmelte/impressionen http and https same behavior
