Still seeing CUPS related IPv6 multicast requests from my machine on 18.04
bionic, right after plugging in a USB device:
[11593.578868] usb 2-1.1: new high-speed USB device number 4 using ehci-pci
[11593.693173] usb 2-1.1: New USB device found, idVendor=0e8d, idProduct=1807
[11593.693182] usb 2-1.1: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[11593.693187] usb 2-1.1: Product: MT1807
[11593.693192] usb 2-1.1: Manufacturer: MediaTek Inc
[11593.693196] usb 2-1.1: SerialNumber:
[11594.085831] usb-storage 2-1.1:1.0: USB Mass Storage device detected
[11594.086113] scsi host6: usb-storage 2-1.1:1.0
[11594.086272] usbcore: registered new interface driver usb-storage
[11594.257746] [UFW BLOCK] IN=wlp2s0 OUT= MAC= SRC=<Ubuntu machine IPv6>
DST=ff02:0000:0000:0000:0000:0000:0000:0001 LEN=64 TC=0 HOPLIMIT=1
FLOWLBL=659619 PROTO=UDP SPT=8612 DPT=8612 LEN=24
[11594.257765] [UFW BLOCK] IN=wlp2s0 OUT= MAC= SRC=<Ubuntu machine IPv6>
DST=ff02:0000:0000:0000:0000:0000:0000:0001 LEN=64 TC=0 HOPLIMIT=1
FLOWLBL=952340 PROTO=UDP SPT=8612 DPT=8610 LEN=24
[11594.268122] [UFW BLOCK] IN=wlp2s0 OUT= MAC= SRC=<Ubuntu machine IPv6>
DST=ff02:0000:0000:0000:0000:0000:0000:0001 LEN=64 TC=0 HOPLIMIT=1
FLOWLBL=659619 PROTO=UDP SPT=8612 DPT=8612 LEN=24
[11594.268197] [UFW BLOCK] IN=wlp2s0 OUT= MAC= SRC=<Ubuntu machine IPv6>
DST=ff02:0000:0000:0000:0000:0000:0000:0001 LEN=64 TC=0 HOPLIMIT=1
FLOWLBL=952340 PROTO=UDP SPT=8612 DPT=8610 LEN=24
No longer seeing IPv4 requests though
** Changed in: cups (Ubuntu)
Status: Expired => Confirmed
** Tags added: bionic
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https://bugs.launchpad.net/bugs/1671974
Title:
CUPS - Excessive Amounts of UDP Multicast Traffic for BJNP
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