I set up a VM running openSUSE Tumbleweed and changed the default shell to zsh. My AVM Fritzbox router regularly probes the VM on port 80 to check for webservices. Because port 80 is closed on the openSUSE system, the request gets blocked.

I also get a dmesg (?) message written to my current zsh prompt. That didn't seem to be the case with bash. What could be the reason and how do I stop the messages from appearing (besides opening port 80 of course).

  • What exactly does the message say? – Kamil Maciorowski Jul 4 '17 at 21:45
  • @KamilMaciorowski [ 1018.144672] SFW2-INext-DROP-DEFLT IN=ens33 OUT= MAC=00:0c:29:d0:ce:63:c8:0e:14:d2:4d:dc:08:00 SRC= DST= LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=60930 DF PROTO=TCP SPT=51668 DPT=80 WINDOW=14600 RES=0x00 SYN URGP=0 OPT (020405B40402080A044A1C170000000001030305) but I don't think that is going to help alot, since i already described its meaning. – Xaser Jul 7 '17 at 21:53
  • Does it happen on /dev/tty1 only? This may help. – Kamil Maciorowski Jul 7 '17 at 22:13
  • seems to be printed to the current tty, but not to ssh ptys. still you may be on to something with sysctl – Xaser Jul 8 '17 at 13:59

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