Most likely malware in your network.
invest in a firewall and antivirus for your lan.
Regards,
Sent from Samsung tablet
Hi skunks,In the recent few days, I have kept on getting my public IP blocked. Essentially the scenario has been that users including myself can access the internet from the LAN, but cant reach my mail and web host servers. No emails as I am popping directly from the server. However when I use a Modem/Phone tethering, I am able to reach the servers. I am not an expert in networks so would appreciate advice from the experts in the list-including recommendations such as change your ISP, Host etc etc