Does Squid proxy support https?

How do I forward traffic in Squid proxy?

I'm trying to set up an Internet facing server (on a VPS) running Squid on port 3128 and to redirect incoming requests to it by doing the following;. Iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 3128. Iptables -t nat -A PREROUTING -p tcp --dport 443 -j REDIRECT --to-ports 3128. The reason for having the -p tpd is that I would prefer requests to go via Squid for the sake of speed before sending to the main server. I also have Squid running on Port 3128. I've then tried setting up a new site and the request hits this part just fine, it is when I hit the Internet site's root or anything above it that Squid won't work. If I had a VPS too, and it wasn't hosted by Amazon or Rackspace, I would use iptables for my redirections as well. That said, to my knowledge, the only two options are not to have the redirection rules (but that will probably not work), or to not forward the entire request. This isn't likely an option for an external service (if only some subpath is to be redirected). If that's the case, you should be able to look into -H in an attempt to only redirect the part of the URI after the hostname portion of your domain name (or other domain names of your choice) using whatever string you want to be the prefix after the hostname part.

From the man page for iptables: H, --hostmatch. Matches the given host-name part (after the hostname).

Does Squid proxy support https?

I'm using Squid as the default front end for my server and have setup https for my sites.

It works fine with standard http but not using https.

Check your squid. Apache can load balance HTTP requests and this means a webmaster can serve different people out of different machines.

I don't believe that squid supports SSL - at least not in all the ways I need it to work. Here are the things that didn't work when configuring an SSL proxy for apache http server and tomcat running ssl: When I tried to generate new keys, for example at one point during testing I would run apachectl start and I get "Warning: Can't create temp file for key/certs". The server does report a problem but doesn't ever seem to allow the server to run correctly.

The apache http server wouldn't work correctly when switching protocols. When using SSL it would give the same error to SSL debug messages as apache itself and report a 500 error on SSL handshake which would make ssl debug display these errors. If that's left turned on it would log lots of interesting stuff that we never saw as a website was accessed over https but would never let apache's http server access the files correctly. I found that if it wasn't turning on ssl debug by itself or if you manually disabled it through SSLDebug On the apache httpd.conf I'd leave the line in there because I couldn't shut off ssl debug while keeping it active. You'll end up with ssl debug logging even when no SSL is connected to the site until something weird happened.

Is Squid a forward proxy?

I've been wondering if squid3 can be used to act as a forward proxy for another system.

The primary machine is running Squid 3.5 and has a connection to a local ip address, let's say 123.45.67.89, and I would like to have the Squid on that machine forward any requests it receives to a second machine with a different ip address, let's say 10.11.13, and that second machine should also be able to access the internet.

Is squid3 suited to being a forward proxy? I understand that http requests are processed through either modjk or modevasive, but how can I tell whether or not the squid process uses these modules? Short answer: no, Squid 3 is not designed for use as a forward proxy. Forwarding is an application of Squid which requires Squid to be a client on the receiving end. In addition, since forwarding is implemented via a SOCKS5 tunnel, the receiver of the request must support SOCKS5. It's not currently supported to forward using Squid 3 as a SOCKS5 receiver.

What is https forward proxy?

In modern software products, it's not uncommon to need to connect to some kind of service through a firewall (or other restrictions on what you can do and what you can see). Maybe you're trying to make a request to an API for authentication. Or maybe you're attempting to upload data to a database, or make a web request, but it's all blocked by the firewall.

You're not likely to just put a direct connection in, because that will be filtered and likely blocked. And if you're lucky enough to have a free open port, you're still blocked if you use it.

So how do you get around this? You want to proxy the connection, making it look like it's coming from your site, and the site does not really want you to go through their firewall directly. If you use your browser's incognito mode, it can't even do that, as it uses cookies to remember information about your settings and preferences. It's no good to try and tunnel your connection. The firewall will detect the traffic and either block it completely or, at best, drop your packets.

How does https forward proxy work? There's no magic to it, so we'll look at how it works at the low level. A proxy is a bit like a gateway between different networks. The proxy listens one port, and forwards connections to another. For example, your Internet connection goes through your router, which connects you to the Internet and then forwards your request to the correct website.

Like the router, https forward proxy sits between the client and the server, listens on a particular port, and forwards the connection on to the correct destination. And just like the router, https forward proxy is a protocol. It needs to send messages and responses with the exact same format.

It's possible to do this, as it's possible to create TCP-over-TCP connections without an actual TCP connection being made. But it's more efficient to actually use TCP, so the protocol is defined to follow the TCP connection handshake, and the protocol is built on top of the TCP connection.