[squid-users] Squid 4.6 Transparent HTTP & HTTPS Proxy

[dkanejs]

Foreword

I'm by no means an expert so please bear with me...

I have seen many questions about this but they are all for Squid 3 and none
of the configurations work for Squid 4.

I have also tried using (with adjustment for Squid 4) answers from questions
on here and serverfault, etc but without success.
What I'm trying to do

I'm trying to create a transparent (requires no client configuration) Squid
proxy for HTTP and HTTPS.

In short, I want to whitelist specific domains on both HTTP and HTTPS.
Details

- Building / Running in AWS
- Ubuntu 18.04
- Instance has Source/Destination check disabled
- Private subnets route table points 0.0.0.0/0 to EC2 Instance
- Squid 4.6 compiled with SSL support options: 

Current Configuration


iptables


Results

Using the proxy via a host in the private subnet for HTTP:


Using the proxy via a host in the private subnet for HTTPS:


Happy to share more information / configuration if I've missed something
important.

If anyone can help shed some light on what I'm doing wrong, (or share a
working configuration to put me out of my misery!), it would be much
appreciated thanks!



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