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- <title>Re: GSoC Port Forwarding</title>
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- <table border=0 cellspacing=0 cellpadding=0 width="100%" class="header-part1"><tr><td><div class="headerdisplayname" style="display:inline;">Oggetto: </div>Re: GSoC Port Forwarding</td></tr><tr><td><div class="headerdisplayname" style="display:inline;">Mittente: </div>Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com></td></tr><tr><td><div class="headerdisplayname" style="display:inline;">Data: </div>23/06/2021, 23:11</td></tr></table><table border=0 cellspacing=0 cellpadding=0 width="100%" class="header-part2"><tr><td><div class="headerdisplayname" style="display:inline;">A: </div>Giulio <giulio@gmx.com></td></tr><tr><td><div class="headerdisplayname" style="display:inline;">CC: </div>Frédéric Pierret <frederic.pierret@qubes-os.org></td></tr></table><br>
- <div class="moz-text-plain" wrap=true graphical-quote=true style="font-family: -moz-fixed; font-size: 14px;" lang="x-unicode"><pre wrap class="moz-quote-pre">
- On Wed, Jun 23, 2021 at 04:37:20PM +0200, Giulio wrote:
- </pre><blockquote type=cite style="color: #007cff;"><pre wrap class="moz-quote-pre">
- <span class="moz-txt-citetags">> </span>Hello,
- <span class="moz-txt-citetags">> </span>thank you again for your time and the explanations, as well as the
- <span class="moz-txt-citetags">> </span>network graph. I have now a better understanding of the overall design
- <span class="moz-txt-citetags">> </span>and I am moving myself trhough the source code in order to think what to
- <span class="moz-txt-citetags">> </span>place where.
- <span class="moz-txt-citetags">> </span>
- <span class="moz-txt-citetags">> </span>So, in order to translate what we discussed in practice and also check
- <span class="moz-txt-citetags">> </span>my understanding of the code so far:
- <span class="moz-txt-citetags">> </span>
- <span class="moz-txt-citetags">> </span>1) In core-admin-client/qubesadmin/firewall.py firewall.py > The code
- <span class="moz-txt-citetags">> </span>needs to support the new options for the rule (action=forward
- <span class="moz-txt-citetags">> </span>frowardtype=<internal/external> srcports=443-443 srchosts=0.0.0.0/0
- <span class="moz-txt-citetags">> </span>2) In core-admin/qubes/firewall.py -> The code needs to support the same
- <span class="moz-txt-citetags">> </span>options as the point above
- <span class="moz-txt-citetags">> </span>3) In core-admin/qubes/vm/mix/net.py -> The most important logic goes
- <span class="moz-txt-citetags">> </span>here. Here there is the need to resolve the full network chain for
- <span class="moz-txt-citetags">> </span>external port forwarding. From here it is possible to add the respective
- <span class="moz-txt-citetags">> </span>rules to the QubesDB of each netvm in he chain and trigger a reload event.
- <span class="moz-txt-citetags">> </span>4) in core-agent-linux/qubesagent/firewall.py -> Here goes the logic for
- <span class="moz-txt-citetags">> </span>building the correct syntax for iptables or nft and the actual execution
- <span class="moz-txt-citetags">> </span>
- <span class="moz-txt-citetags">> </span>Does it makes sense for you?
- </pre></blockquote><pre wrap class="moz-quote-pre">
- Yes, I think you got this perfectly correct.
- </pre><blockquote type=cite style="color: #007cff;"><pre wrap class="moz-quote-pre">
- <span class="moz-txt-citetags">> </span>I now totally understand your doubts, and I think the simplest solution
- <span class="moz-txt-citetags">> </span>then would be a time/date picker, so if the user is planning anything
- <span class="moz-txt-citetags">> </span>specific he can configure all the set of rules to the same expiration
- <span class="moz-txt-citetags">> </span>timewithout incurring in the synchronization issues you mentioned.
- </pre></blockquote><pre wrap class="moz-quote-pre">
- Yes, that could work, with some easy way to use the same time for
- multiple rules (for example default to the last choice).
- <div class="moz-txt-sig">--
- Best Regards,
- Marek Marczykowski-Górecki
- Invisible Things Lab
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