503 Response when RewriteLocalhost=false

[klym1]

Prerequisites

• I have written a descriptive issue title
• I have verified that I am running the latest version of Nancy
• I have verified if the problem exist in both DEBUG and RELEASE mode
• I have searched open and closed issues to ensure it has not already been reported

Description

Trying to run self-hosted Nancy with RewriteLocalhost=false:

_host = new NancyHost(new Uri("http://localhost:4444/"), 
 new HostBootstrapper(), 
 new HostConfiguration
             {
                 RewriteLocalhost = false
             });
_host.Start();

But it doesn't work, when I try to send some request it always responses with 503 Status:

GET / HTTP/1.1
Host: localhost:4444
User-Agent: insomnia/6.0.2
Accept: */*

HTTP/1.1 503 Service Unavailable
Content-Type: text/html; charset=us-ascii
Server: Microsoft-HTTPAPI/2.0
Date: Tue, 28 Aug 2018 16:40:50 GMT
Connection: close
Content-Length: 326

I don't want Nancy to listen on http://+:4444/ but simply on the IP I provide.

System Configuration

• Nancy self-hosted
• Nancy 1.4.4.0, Nancy.Hosting.Self 1.4.1.0
• Windows 10 x64
• .Net 4.7.1

[cloudhunter89]

Did you run the application once with RewriteLocalHost = true? Your problem is likely an issue with how Windows handles overlapping/conflicting http urlacl reservations. If there is an entries for both http://+:4444/ and http://localhost:4444/ Windows will return a 503 for the application listening on localhost. You can list all reservations with `netsh http show urlacl`. You can remove the wildcard reservation by running `nesth http remove urlacl http://+:4444/` (from an administrator cmd prompt)

…

On Tue, Aug 28, 2018 at 10:50 AM Mykola Klymyuk ***@***.***> wrote: Prerequisites - I have written a descriptive issue title - I have verified that I am running the latest version of Nancy - I have verified if the problem exist in both DEBUG and RELEASE mode - I have searched open <https://github.com/NancyFx/Nancy/issues> and closed <https://github.com/NancyFx/Nancy/issues?q=is%3Aissue+is%3Aclosed> issues to ensure it has not already been reported Description Trying to run self-hosted Nancy with RewriteLocalhost=false: _host = new NancyHost(new Uri("http://localhost:4444/"), new HostBootstrapper(), new HostConfiguration { RewriteLocalhost = false });_host.Start(); But it doesn't work, when I try to send some request it always responses with 503 Status: GET / HTTP/1.1 Host: localhost:4444 User-Agent: insomnia/6.0.2 Accept: */* HTTP/1.1 503 Service Unavailable Content-Type: text/html; charset=us-ascii Server: Microsoft-HTTPAPI/2.0 Date: Tue, 28 Aug 2018 16:40:50 GMT Connection: close Content-Length: 326 I don't want Nancy to listen on http://+:4444/ but simply on the IP I provide. System Configuration - Nancy self-hosted - Nancy 1.4.4.0, Nancy.Hosting.Self 1.4.1.0 - Windows 10 x64 - .Net 4.7.1 — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#2925>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AEEilnKHS2zheNFCdydtfm4g2lKDqxrEks5uVXTagaJpZM4WQAYC> .

-- Jonathon Koyle

[klym1]

@cloudhunter89 Thanks for the answer. Yes, indeed, previously Nancy host was usually started with default RewriteLocalHost value (which is true). Who would expect that 503 is returned by OS!
Removing the reservation has fixed the problem.