Update purchase/subscribe links

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

Author: alexellis

docs/reference/inlets-operator.md

@@ -13,7 +13,7 @@ For each provider, the minimum requirements tend to be:
 
 You can install the inlets-operator's Helm chart using a single command with [arkade](https://arkade.dev/). arkade is an open-source Kubernetes marketplace and easy to use. Helm involves more commands, and is preferred by power users.
 
-> You can [subscribe to inlets for personal or commercial use via Gumroad](https://inlets.dev/pricing)
+> [Get your inlets subscription here](https://inlets.dev/pricing)
 
 ## Tunnel Custom Resource Definition (CRD) and lifecycle
 

docs/tutorial/automated-http-server.md

@@ -175,7 +175,7 @@ I used this technique to test a live demo for the KubeCon conference. I then too
 
 In a very short period of time we created a private tunnel server on a public cloud of our choice, then we created a DNS record for it, and connected a client and accessed our local website.
 
-You can [get started with inlets through a monthly subscription](https://inlets.dev/pricing), or save on a yearly plan.
+You can [get started with inlets through a monthly subscription](https://inlets.dev/pricing).
 
 When would you need this?
 

docs/tutorial/caddy-http-tunnel.md

@@ -16,7 +16,7 @@ Scenario:
 * You want to share a file such as a VM image or a ISO over the Internet, with HTTPS, directly from your laptop.
 * You have one or more websites or APIs running on-premises or within your home-lab and want to expose them on the Internet.
 
-> You can [subscribe to inlets for personal or commercial use via Gumroad](https://inlets.dev/blog/2021/07/27/monthly-subscription.html)
+> > [Get your inlets subscription here](https://inlets.dev/pricing)
 
 ## Setup your exit node
 

docs/tutorial/http-authentication.md

@@ -10,6 +10,8 @@ The `inlets-pro http` command provides three options:
 2. Bearer Token Authentication
 3. OAuth
 
+You may also be interested in [IP filtering](/tutorial/ip-filtering), which is configured on the server. This restricts access to a provided set of source IPs or CIDRs. 
+
 ## Basic Authentication
 
 Basic authentication is a simple way to restrict access to your service by requiring a username and password.

docs/tutorial/kubernetes-ingress.md

@@ -4,7 +4,7 @@ In this quick-start we will configure the [inlets-operator](https://github.com/i
 
 The inlets-operator creates a VM for each tunnel server in the cloud of your choice, then plumbs in an inlets client to connect to it using a Deployment. There is an alternative approach that we also recommend which involves creating the tunnel server with [inletsctl](https://github.com/inlets/inletsctl), followed by installing the inlets client with Helm: [Fixing Ingress for short-lived local Kubernetes clusters](https://inlets.dev/blog/2021/07/08/short-lived-clusters.html).
 
-> You can [subscribe to inlets for personal or commercial use via Gumroad](https://inlets.dev/blog/2021/07/27/monthly-subscription.html)
+> [Get your inlets subscription here](https://inlets.dev/pricing)
 
 ## Pre-reqs
 

docs/tutorial/postgresql-tcp-tunnel.md

@@ -2,7 +2,7 @@
 
 In this tutorial we will tunnel Postgresql over inlets Pro to a remote machine. From there you can expose it to the Internet, or bind it to the local network for private VPN-like access.
 
-> You can [subscribe to inlets for personal or commercial use via Gumroad](https://inlets.dev/blog/2021/07/27/monthly-subscription.html)
+> > [Get your inlets subscription here](https://inlets.dev/pricing)
 
 ## Setup your exit node
 

docs/tutorial/ssh-tcp-tunnel.md

@@ -4,7 +4,7 @@ In this tutorial we will use inlets-pro to access your computer behind NAT or a
 
 Scenario: You want to allow SSH access to a computer that doesn't have a public IP, is inside a private network or behind a firewall. A common scenario is connecting to a Raspberry Pi on a home network or a home-lab.
 
-> You can [subscribe to inlets for personal or commercial use via Gumroad](https://inlets.dev/blog/2021/07/27/monthly-subscription.html)
+> > [Get your inlets subscription here](https://inlets.dev/pricing)
 
 ## Setup your tunnel server with `inletsctl`