Mike's questions

Can anyone recommend a linux command line tool to monitor the number of bytes transferred between the local server and a specified IP address/port.

The equivalent tcpdump command would be:

tcpdump -s 0 -i any -w mycapture.trc port 80 host google.com

which outputs :

46 packets captured
131 packets received by filter
0 packets dropped by kernel

I'd like something similar that outputs:

54 bytes out, 176 bytes in

I'd like it to work on RHEL and be free/open-source. It would be good if there was an existing tool which I was just missing too!

I have nginx configured to be my externally visible webserver which talks to a backend over HTTP.

The scenario I want to achieve is:

1. Client makes HTTP request to nginx which is redirect to the same URL but over HTTPS
2. nginx proxies request over HTTP to the backend
3. nginx receives response from backend over HTTP.
4. nginx passes this back to the client over HTTPS

My current config (where backend is configured correctly) is:

server {
        listen       80;
        server_name  localhost;

        location ~ .* {
            proxy_pass http://backend;
            proxy_redirect http://backend https://$host;
            proxy_set_header Host $host;
            }
        }

My problem is the response to the client (step 4) is sent over HTTP not HTTPS. Any ideas?