[KRdp] [Bug 488884] New: The RDP server is only listening for legacy-IP (IPv4) connections

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https://bugs.kde.org/show_bug.cgi?id=488884

            Bug ID: 488884
           Summary: The RDP server is only listening for legacy-IP (IPv4)
                    connections
    Classification: Plasma
           Product: KRdp
           Version: 6.1.0
          Platform: Arch Linux
                OS: Linux
            Status: REPORTED
          Severity: minor
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: fell at fellr.net
                CC: ahiemstra at heimr.nl
  Target Milestone: ---

TLDR: KRdp does not support IPv6.

SUMMARY
When starting an RDP server from the new page in system settings, it
automatically creates a legacy-IP (IPv4) socket and is not reachable via IPv6.
This is indicated by the listen adresses shown in the GUI and also confirmed by
running `ss` and observing that the bound IP address is `0.0.0.0`, preventing
IPv6 connections. There is no option to enable IPv6.

STEPS TO REPRODUCE
1. Start RDP server via system settings.
2. Run `ss -tl | grep 3389`.

OBSERVED RESULT
 - Observe, that the displayed IP addresses in the GUI are only IPv4.
 - Observe, that the listening IP in the command line output is `0.0.0.0`,
which prevents IPv6 connections.

EXPECTED RESULT
 - The server should support IPv6 by default.
 - The displayed IP addresses after starting it from the GUI should include at
least one IPv6 address.
 - The listening IP should be `::` to support both IPv4 and IPv6 connections.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 6.1.0
KDE Frameworks Version: 6.3.0
Qt Version: 6.7.1
Kernel Version: 6.9.5-zen1-1.1-zen (64-bit)
Graphics Platform: wayland
Processors: 24 × AMD Ryzen 9 3900X 12-Core Processor
Memory: 31.3 GiB of RAM

ADDITIONAL INFORMATION
This bug may be related to https://bugs.kde.org/show_bug.cgi?id=352434

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