I would like to prevent the particular IP address from accessing my jomsocial web site, who often commented like a spam in my site.
Would you teach me how to investigate his IP address and ban his IP address on Jomsocial or Joomla?
I would like to investigate and ban his IP address on Joomla admin site.

And would you tell me the other site administrator in general takes measures against the person like a spammer on Joomla ?
Which extension is suitable for me?

Hi,

You cant do it from Jomsocial side, but you can do it on your server side, or by installing 3rd party joomla plugin
extensions.joomla.org/extension/cfblockcountry
extensions.joomla.org/profile/extension/...te-access/geoblocker
extensions.joomla.org/extension/ju-blockip

thank you

Hi Dimas,

Thank you for your advice!
I'll try it.

Thank you.

you're welcome ;)