I am plagued by some mysterious console output in either of the tty CTRL+ALT+F1-F6
When I go to a console tty these pops up regularly

SFWZ-INext-ACC IN=eth0 OUT= MAC= SRC= DST= LEN=122 TOS=0x00 PREC=0x00 TTL=1 ID=62116 DF PROTO=UDP
SFWZ-INext-DROP-DEFLT IN=eth0 OUT= MAC=00:22:15:41:1c:83:e4...... SRC= DST= LEN=286

No matter where I am in the console, writing a command, reading a file with less.
It makes it hard to write commands when these pop up in between.

I have just upgraded to Leap 15. I experienced this problem before also on Leap 42.3