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Trying to route outgoing http requests through VPN on Ubuntu Server 12.04

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http://serverfault.com – I've got an Ubuntu 12.04 server running on Amazon's EC2 that runs a web crawling process. We're running into a problem where some of the webservers hosting the sites we need to crawl are blocking all EC2 IP addresses. My brilliant idea was to tunnel outgoing HTTP requests through a VPN. I was able to get the VPN set up but it routed ALL traffic through the VPN which meant that I couldn't SSH into the machine and it wouldn't respond to any incoming http requests. (This server also hosts a web service that we need to be able to access) Really I just want to "proxy" all outgoing HTTP reque ()

taskli's picture
Submitted by taskli on 07/15/2012

Stories similar to Trying to route outgoing http requests through VPN on Ubuntu Server 12.04

My web-app tracks various online services and to do so, makes frequent outgoing TCP and UDP requests (through PHP).

Unfortunately, my web-app was recently hit by a DDoS attack. To counter it, I installed a proxy for incoming requests (CloudFlare) and this seems to work well.

I'm using a virtual Ubuntu Server (on Amazon EC2) and I want to connect to a PPTP VPN server to route outgoing traffic through this connection. To do this, I specify the following two options:

defaultroute replacedefaultroute

This works - but the moment the tunnel to route the traffic is established, my SSH connection to the server is broken and I can't reconnect.

For example, I'd like to monitor all outgoing connections initiated from my machine. Is there a simple way to do this?

I'd like to ignore incoming requests. For example, if my machine is a server, and someone visits foobar.com which is hosted on my server, then I'm considering that an incoming request.

I've got a cheap VPS running Ubuntu 12.04 that I sometimes proxy web traffic through via SSH when I don't trust the network I'm on. I'd like to have a closer look at some of that traffic on occasion.

I run a web server (Debian Squeeze on a VPS), and the graphs provided by the hosting company show consistently that around twice as much traffic is incoming to the server compared to the outgoing traffic.

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I am a Windows (IIS) software engineer, but recently I've been thrown into a Linux server admin role until we can find someone to fill the position. I am not ashamed to admit I have no idea what I am doing.

Currently the problem I am trying to solve is that the server is only responding to https requests. However, we need it to respond to standard http requests as well.

I understand that somebody would want to block incoming traffic as a general rule except for public resources. And I also understand that you could want to block all outgoing traffic except for certain external services.

But is there any serious security risk if I allow incoming traffic that represents responses to previous outgoing traffic, e.g. HTTP requests?

I am on a network where outgoing port 8080 is blocked on most machines (i.e.

I'm running ubuntu server in an EC2 instance. This server just does the job of executing some perl scripts.

I want to block all outgoing ports on this server.