Enabling net.tcp in IIS7

How can I make IIS handle net.tcp connections?

You need to add net.tcp to the enabled protocols of your site. Go to IIS Manager, right-click on your website, go to 'Manage Web Site' or 'Manage Application', then to 'Advanced Settings...'. There you see 'Enabled Protocols'. It probably says http. Change it to http,net.tcp.

If you want to configure bindings, right-click on your website and go to 'Edit Bindings...'. The default net.tcp binding is 808:*.

If you want to use WCF services hosted by IIS behind net.tcp, you may also want to check whether you have activated the required Windows Features. Go to your Windows Features and check you have activated 'Windows Communication Foundation Non-HTTP Activation' (found under 'Microsoft .NET Framework 3.5.1').

When you activate this feature, you will get some extra Windows Services. If it still doesn't work, check that the Windows Service named 'Net.Tcp Listener Adapter' is running (should start automatically but sometimes it doesn't and this is the first place I check when one of my net.tcp services stops working).

This might help someone in the future. I created a powershell script that will come in useful if you need to automate the creation of the bindings.

It will automatically check if the binding exists already and only add it when required.

Actual Script

Import-Module WebAdministration
 
$websites = Get-ChildItem 'IIS:\Sites'
$site = $websites | Where-object { $_.Name -eq 'Default Web Site' }
$netTcpExists = [bool]($site.bindings.Collection | ? { $_.bindingInformation -eq '808:*' -and $_.protocol -eq 'net.tcp' })
 
if (!$netTcpExists)
{
    Write-Output "Net TCP binding does not exist. Creating binding now..."
    # Create the binding
    New-ItemProperty 'IIS:\Sites\Default Web Site' -name bindings -Value @{protocol="net.tcp";bindingInformation="808:*"}
 
    Write-Output "Binding created"
}
else
{
    Write-Output "TCP Binding already exists"
}

Write-Output "Updating enabled protocols..."

Set-ItemProperty 'IIS:\sites\Default Web Site' -name EnabledProtocols -Value "http,net.tcp"

Write-Output "Enabled protocols updated"

The last step worked for me.

1. Make sure that these protocols are defined in the “Advanced Settings” of the website
2. Make sure the features below are installed
3. The services below should be running
4. Your application pool should use Integrated pipeline
5. Close IIS Manager, reset IIS, and open IIS Manager again
6. Check the listenerAdapters section in the applicationHost.config file ( Located in C:\Windows\System32\inetsrv\config). If you don’t see those listener adapters you want to use in bindings, add them manually Source: Missing bindings in IIS (net.tcp, net.pipe, net.msmq, msmq.formatname)

In my case, I had to add the net.tcp protocol not only to the website, but to the application below it (right-click the application, advanced settings, enabled protocols).