By default GridPane has blocked viber and ahrefs bots. We have to made some changes to the servers in order to allow these bots to communicate with our sites.1
Step 1
Edit this file: nano /etc/nginx/extra.d/allow-bots-7g-bad-bot-context.conf
The main concept here is to remove from these lines all the bots that we don’t want to have. So just copy and paste the following code:
"~*(acapbot|acoonbot|asterias|attackbot|backdorbot|becomebot|binlar|blackwidow|blekkobot|blexbot|blowfish|bullseye|bunnys|butterfly|careerbot|casper|checkpriv|cheesebot|cherrypick|chinaclaw|choppy|clshttp|cmsworld|copernic|copyrightcheck|cosmos|crescent|cy_cho|datacha|demon|diavol|discobot|dittospyder|dotbot|dotnetdotcom|dumbot|emailcollector|emailsiphon|emailwolf|exabot|extract|eyenetie|feedfinder|flaming|flashget|flicky|foobot|g00g1e|getright|gigabot|go-ahead-got|gozilla|grabnet|grafula|harvest|heritrix|httrack|icarus6j|jetbot|jetcar|jikespider|kmccrew|leechftp|libweb|linkextractor|linkscan|linkwalker|masscan|miner|mechanize|morfeus|moveoverbot|netmechanic|netspider|nicerspro|nikto|ninja|nutch|octopus|pagegrabber|petalbot|planetwork|postrank|proximic|purebot|pycurl|python|queryn|queryseeker|radian6|radiation|realdownload|scooter|seekerspider|semalt|siclab|sindice|sistrix|sitebot|siteexplorer|sitesnagger|skygrid|smartdownload|snoopy|sosospider|spankbot|spbot|sqlmap|stackrambler|stripper|sucker|surftbot|sux0r|suzukacz|suzuran|takeout|teleport|telesoft|true_robots|turingos|turnit|vampire|vikspider|voideye|webleacher|webreaper|webstripper|webvac|webviewer|webwhacker|winhttp|wwwoffle|woxbot|xaldon|xxxyy|yamanalab|yioopbot|youda|zeus|zmeu|zune|zyborg)" 3000;
"~*(alexibot|majestic|mj12bot|rogerbot)" 2002;
Step 2
Also edit this file: nano /etc/nginx/extra.d/bad-bot-whitelist-7g-context.conf
Just copy and paste the following code
# Remove Rule #5 for $bad_bot_7g
set $exclusion_rule_match "";
if ($bad_bot_7g) {
set $exclusion_rule_match 5;
set $exclusion_rule_match_ahrefs 2001;
}
if ($bad_bot_7g = $exclusion_rule_match) {
set $7g_drop_bad_bot 0;
}
# Remove Rule 2001 for $bad_bot_7g
if ($bad_bot_7g = $exclusion_rule_match_ahrefs) {
set $7g_drop_bad_bot 0;
}
Step 3
Check NGINX syntax with the following command: nginx -t
If everything is correct you should be able to see the following message:
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

Step 4
Reload NGINX with the following command: gp ngx reload
https://www.youtube.com/watch?v=TThpz9WfjD4
⚠️ Important step
if you are edit the file and you are seeing > in the end of the file this means the line is turncated.
"~*(acapbot|acoonbot|asterias|attackbot|backdorbot|becomebot|binlar|blackwidow|blekkobot|blexbot|blowfish|bullseye|bunnys|butterfly|careerbot|casper|checkpriv|cheesebot|cherrypick|chinaclaw|choppy|clshttp|cmsworld|copernic|copyrightcheck|cosmos|crescent|cy_cho|datacha|demon|diavol|discobot|dittospyder|dotbot|dotnetdotcom|dumb>
To resolve that and see the full line you have to run the file with cat command. Then you will be able to copy/paste the whole line.
cd /etc/nginx/common
cat 7g-mappings.conf