I'd actually suggest grepping for the IP in /etc to see if the IP is listed anywhere:
Please replace
IP# with the IP in question. If the system believes it is already added, it might not be in /etc/ips but in some other file. This could also happen if it is somehow listed in httpd.conf, so please also check that file:
Code:
grep IP# /usr/local/apache/conf/httpd.conf
If it's already been added by someone in ifconfig, please check that:
I always prefer to grep for the specific occurrence over trying to cat files and getting extraneous data.