Bug 508270 - network multicast and network broadcast should stay in local domain. set IPv4header field TTL=1
Summary: network multicast and network broadcast should stay in local domain. set IPv4...
Status: REPORTED
Alias: None
Product: plasma-mobile
Classification: Plasma
Component: general (other bugs)
Version First Reported In: unspecified
Platform: Android Android 14.x
: NOR normal
Target Milestone: ---
Assignee: Plasma Mobile Bugs
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-08-15 06:48 UTC by Riegler Bernhard
Modified: 2025-08-15 06:48 UTC (History)
1 user (show)

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Description Riegler Bernhard 2025-08-15 06:48:20 UTC 
KDEconnect v1.33.4

UDP    multicast   to IP4 255.255.255.255 dest_port 1716 sends IP.TTL=64
mDNS broadcast to IP4 224.0.0.251          dest_port 5353 sends IP.TTL=255 for _kdeconnect._udp.local


STEPS TO REPRODUCE
1. POWER on Android 16
2. enable Wi-Fi network
3. start "KDEconnect"

the frames travel Wi-Fi into the LAN-Access-Point into ethernet
I use "wireshark" on PC Linux Ubuntu 22.04LTS to trace the network. (ethernet)
I find the BEACON with UDPport 1716
I find the mDNS with UDPport 5353

EXPECTED RESULT
all multicast and broadcast should have limit TTL=1 for the IP4-Routers.