Apache Forward Proxy With SSL Termination - apache

Question

I'm trying to set up an Apache Forward Proxy that terminates the SSL connection. The reason I'm trying to do this is to run Apache filters (specifically mod_pagespeed) on the returned code. Before I deal with mod_pagespeed, I'm testing this POC by trying to insert a header into the response (which will prove that I can edit the response), but I'm having issues with SSL proxying (non-SSL proxying works fine).
Note that I'm not concerned about any certificate errors or the like -- this is purely for internal testing.
I've got the server set up and see the X-MSCProxy Header on a non-SSL page:
jshannon-macbookpro:pagespeed_proxy jshannon$ curl -vv --proxy pagespeed_proxy:3ja82ad9#localhost:8080 -D - -o /dev/null http://www.slate.com
* TCP_NODELAY set
* Connected to localhost (::1) port 8080 (#0)
* Proxy auth using Basic with user 'pagespeed_proxy'
> GET http://www.slate.com/ HTTP/1.1
> Host: www.slate.com
...
>
< HTTP/1.1 200 OK
HTTP/1.1 200 OK
< Date: Mon, 30 Oct 2017 18:10:40 GMT
Date: Mon, 30 Oct 2017 18:10:40 GMT
< Server: Apache/2.2.29 (Amazon)
Server: Apache/2.2.29 (Amazon)
...
< Content-Length: 187051
Content-Length: 187051
...
< X-Instart-Request-ID: 8286987369135064135:FWP01-NPPRY22:1509387040:0
X-Instart-Request-ID: 8286987369135064135:FWP01-NPPRY22:1509387040:0
< Via: 1.1 172.17.0.2:8080
Via: 1.1 172.17.0.2:8080
< X-MSCProxy: SansPS
X-MSCProxy: SansPS
But when I make the same request to Slate's SSL page I don't see my proxy:
jshannon-macbookpro:pagespeed_proxy jshannon$ curl -vv --proxy pagespeed_proxy:3ja82ad9#localhost:8080 -D - -o /dev/null https://www.slate.com
* Connected to localhost (::1) port 8080 (#0)
* Establish HTTP proxy tunnel to www.slate.com:443
* Proxy auth using Basic with user 'pagespeed_proxy'
> CONNECT www.slate.com:443 HTTP/1.1
> Host: www.slate.com:443
< HTTP/1.0 200 Connection Established
HTTP/1.0 200 Connection Established
< Proxy-agent: Apache/2.4.25 (Debian)
Proxy-agent: Apache/2.4.25 (Debian)
<
* Proxy replied OK to CONNECT request
* TLS 1.2 connection using TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
* Server certificate: ssl004.insnw.net
* Server certificate: GlobalSign CloudSSL CA - SHA256 - G3
* Server certificate: GlobalSign Root CA
> GET / HTTP/1.1
> Host: www.slate.com
> User-Agent: curl/7.54.0
> Accept: */*
>
< Content-Length: 187044
Content-Length: 187044
< Connection: keep-alive
Connection: keep-alive
< Server: Apache/2.2.29 (Amazon)
Server: Apache/2.2.29 (Amazon)
< X-Instart-Request-ID: 762420041708891440:FWP01-NPPRY21:1509387251:0
X-Instart-Request-ID: 762420041708891440:FWP01-NPPRY21:1509387251:0
I've found a lot of posts that say this is possible (and, technically, it should be) with various httpd.conf suggestions, but nothing I've tried has worked. Right now my httpd.conf looks like:
<VirtualHost *:8080>
ProxyRequests On
ProxyVia On
Header set X-MSCProxy SansPS
#SSLEngine On
# suggestion that this allows termination
ProxyPreserveHost On
SSLProxyEngine on
SSLProxyCheckPeerCN Off
SSLProxyCheckPeerExpire Off
SSLProxyCheckPeerName Off
SSLCertificateFile /etc/apache2/ssl/localhost.crt
SSLCertificateKeyFile /etc/apache2/ssl/localhost.key
ModPagespeed Off
</VirtualHost>
FWIW, when I enable SSLEngine on this proxy (as has been suggested) then the request simply doesn't work with this error from Apache:
[Mon Oct 30 18:20:20.705047 2017] [ssl:info] [pid 372:tid 140147985901312] [client 172.17.0.1:34012] AH01996: SSL handshake failed: HTTP spoken on HTTPS port; trying to send HTML error page
[Mon Oct 30 18:20:20.705107 2017] [ssl:info] [pid 372:tid 140147985901312] SSL Library Error: error:1407609C:SSL routines:SSL23_GET_CLIENT_HELLO:http request -- speaking HTTP to HTTPS port!?
Which I guess makes sense as the proxy protocol isn't expecting an HTTPS connection directly to the proxy.

Answer 1

I would try to use the output filter feautre fom apache.
https://www.modpagespeed.com/doc/configuration#apache_specific
AddOutputFilterByType MOD_PAGESPEED_OUTPUT_FILTER text/html

Answer 2

Try to add https:// to the curl proxy command like this:
jshannon-macbookpro:pagespeed_proxy jshannon$ curl -vv --proxy https://pagespeed_proxy:3ja82ad9#localhost:8080 -D - -o /dev/null https://www.slate.com
Apache complained about connecting to port 8080 with http even though https is configured for this port.