The last "column" in my Apache server logs lists either a pair of IPs, one single IP, or is empty (i.e. "-"). Sometimes the first in a pair of IPs is "unknown". It looks something like this:
"unknown, 141.91.240.141"
"172.26.243.42"
"-"
"10.14.2.6, 10.14.2.65"
What is that?
I'm on a shared server and cannot access the config file.