ConfigServer Community Forum

Check your latest update log and see if SSH has been updated. If it has, stop the service then restart as the old executable may still be running even though a new version has been installed.

If it's a forum that is PHP based consider installing Suhosin for additional protection and ensure your software is up to date. Check a portion of the IP's and consider using country blocks as opposed to individual blocks, this can make a huge difference.

Same happening to me too, this seems to be a common occurrence.

SPT=64348 DPT=26 are for the ports.

SPT = Source Port, the port the incoming packet has been sent from.
DPT = Destination Port, the server port the packet is aimed at.