nginx can definitely do this and divide/redirect traffic by conditions specified all the way up to the application layer (as a 'reverse' proxy).

However, I'm feeling this is an XY Problem, and that OP really doesn't want to be writing their own 'filter' or 'proxy'. Furthermore, it doesn't seem OP has the hardware resources (nor the financial resources or C-level backing) to do things properly.

Perhaps if OP would state a bit more about their infrastructure, traffic patterns (how does traffic arrive to the box), DNS setup (from the external and internal sides) and what they're trying to achieve overall, the network people here may be able to help them come up with a solution that isn't overly insecure, and doesn't compromise traffic destined for other services.

You do not want to promise something that you can't deliver, especially in an environment where you've got no backing whatsoever to make it so.

In reply to Re^3: Networking with IO::Socket by stevieb
in thread Networking with IO::Socket by TheVend

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.