Hello,

We have noticed some wrong url on our site lately, and it appears to be a crawler from Faceboοk crawler (facebookexternalhit) requesting with wrong querystring parameter “&” instead of “?”. We're seeing a every day amount of those wrong requests from facebookexternalhit/1.1

• I also checked the requested urls on the debugger tool and those are not been shared on facebook. • The user agent for all requests is: "facebookexternalhit/1.1 (+http://www.facebook.com/externalhit_uatext.php)", and the traffic is spread from your whole IP block, so not a single IP sending the requests.

1: Can you guys look into this and resolve it? 2: Is there some we can do too?

Log follows below: Those url have wrong querystring parameter “&” instead of “?”. Sample urls https://www.xo.gr/profile/profile-911438579/el/&ved=2ahUKEwjLiL3TiaPsAhUwNOwKHXvyDpkQFjANegQIARAB&usg=AOvVaw https://www.xo.gr/profile/profile-905958412/el/&ved=2ahUKEwigzJvKgKPsAhUBA2MBHaOhDMUQFjAFegQIBxAB&usg=AOvVaw https://www.xo.gr/profile/profile-907370676/el/&ved=2ahUKEwit3eb-naLsAhWMM-wKHfaRBSEQFjAKegQIAhAB&usg=AOvVaw https://www.xo.gr/dir-az/&ved=2ahUKEwiC7cegp-DmAhXqsosKHXntAq4QFjAAegQIAhAB&usg=AOvVaw https://www.xo.gr/profile/profile-907370676/el/&ved=2ahUKEwit3eb-naLsAhWMM-wKHfaRBSEQFjAKegQIAhAB&usg=AOvVaw https://www.xo.gr/profile/profile-907370676/el/&ved=2ahUKEwit3eb-naLsAhWMM-wKHfaRBSEQFjAKegQIAhAB&usg=AOvVaw https://www.xo.gr/profile/profile-910995504/el/&ved=2ahUKEwiC7cegp-DmAhXqsosKHXntAq4QFjAAegQIAhAB&usg=AOvVaw

The crawler appears to even be hitting non existent pages https://www.xo.gr/dir-az/T/Trapezeshttp:/www.xo.gr/dir-az/T/Trapezes/Thessaloniki (Kentro - Dimos)/ https://www.xo.gr/dir-az/T/Trapezeshttp:/www.xo.gr/dir-az/T/Trapezes/Thessaloniki (Kentro - Dimos)/

Best Regards,