[Privoxy-users] Binding to port 80

[Rubén Llorente]

Priviledged ports (such as port 80) require administrator (root)
permissions.

If you don't want to run privoxy as a privileged user, you can make
privoxy listen at an unprivileged port (such as 8118) and then use some
iptables trick to redirect traffic that hits your host at port 80 to
port 8118. Doing this requires to have administrative control on the
firewall of your host or its network.

Transparent proxification for TLS/SSL traffic does not work, so
redirecting to port 443 is useless.

If you cannot run privileged applications and cannot administrate the
firewall, you cannot use privileged ports.

Justin Fielding <justinfielding at gmail.com> wrote:
> Hi,
> 
> I've just started playing around with Privoxy and it seems like just what I
> need.  I have a requirement to intercept and divert web traffic for certain
> domains and forward that to an upstream SOCKS proxy.
> 
> This works great with my initial testing (in terms of privoxy identifying
> and forwarding the correct traffic) but my issue is now redirecting all
> HTTP traffic on the network via Privoxy.
> 
> The only real option I have for doing this is to use a route-map on the
> core network which diverts all traffic on ports 80/443 to the privoxy host.
> 
> Now my issue.  I cannot change the destination port while diverting the
> traffic (I can only change the next-hop IP) so need to bind privoxy to
> ports 80/443.  Unfortunately when I try to bind to port 80 I get hte
> following error:
> 
> Fatal error: can't bind to INADDR_ANY:80: Permission denied
> 
> Any ideas why I'm getting this and how to resolve?  Privoxy is running on a
> dedicated Ubuntu VM and there should be no other processes binding to port
> 80.
> 
> Thanks,
> 
> Justin.

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