Ubuntu 20.04 - Network Manager blocks port 68 so our device agent is not able to complete DHCP Discovery

Bug #1902200 reported by shailesh jain
6
This bug affects 1 person
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network-manager (Ubuntu)
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Bug Description

Network Manager blocks port 68 so our device agent is not able to complete DHCP Discovery

we have a component by name DCA-Enabler which does DHCP Discovery and expects response on port 68, this is generic DHCP behavior port number 68 is used by the client to receive (DHCP) server responses.
Refer https://en.wikipedia.org/wiki/Bootstrap_Protocol

In older Ubuntu versions like 16.04, 18.04 etc. Network Manager does not blocks port 68 so DCA-E is able to read the responses.
In Ubuntu 20.04, As network manager has already occupied port 68 it gets the DHCP response but DCA-E does not gets access to the port and cannot read the response.

So let us know what could be the solution for this, is there a way we can call network Manager API and read the DHCP Discovery response ?
Or can we have a call with Canonical and understand on this change in behavior ?

Revision history for this message
Ubuntu Foundations Team Bug Bot (crichton) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1902200/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

tags: added: bot-comment
Paul White (paulw2u)
affects: ubuntu → network-manager (Ubuntu)
tags: added: focal
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