Foreword: I hope I did the right thing in creating this topic. I was uncertain whether to continue the discussion on the topic mentioned below. Please correct me if I was wrong.
As suggested by @bbitsch
I checked some logs on my server, because it is my habit to brutally modify configuration files.
Below are a few logs that are not clear to me (I have removed what might violate privacy).
Could they be due to damage I did in editing the configuration files? Or is everything regular?
warning kernel: DROP_CTINVALID IN=blue0 OUT=red0 MAC=............ SRC=10.10.1.24 DST=47.nnn.nnn.nnn LEN=480 TOS=0x00 PREC=0x00 TTL=63 ID=9096 DF PROTO=TCP SPT=56102 DPT=443 WINDOW=558 RES=0x00 ACK PSH FIN URGP=0
info dhcpd: DHCPREQUEST for 10.10.1.36 from d8:....mac...:55 via blue0
dhcpd 1b daemon err dhcpd: uid lease 10.10.155.4 for client ff:......:ff is duplicate on 10.10.0.0/16
dhcpd 1e daemon info dhcpd: DHCPDISCOVER from ff:......:ff via blue0
dhcpd 1e daemon info dhcpd: DHCPOFFER on 10.10.1.37 to ff............ff via blue0
kernel 04 kern warning kernel: IPv4: martian source 192.168.0.1 from 192.168.0.108, on dev blue0
kernel 04 kern warning kernel: ll header: 00000000: ...........................
More or less these are the “mystery” errors I see at the moment. They keep repeating themselves. If they are regular, maybe I currently should not have done any damage.
I thank you in advance.