/ip firewall filter add chain=input connection-state=invalid action=drop /ip firewall filter add chain=input connection-state=established,related action=accept /ip firewall filter add chain=input protocol=icmp action=accept /ip firewall filter add chain=input action=drop

Before installing or upgrading to Mikrotik 6.48.6, make sure to:

. This requires booting the device into a special mode and connecting via a Windows PC. Architecture Matching

Download |best|: Mikrotik 6.48.6

/ip firewall filter add chain=input connection-state=invalid action=drop /ip firewall filter add chain=input connection-state=established,related action=accept /ip firewall filter add chain=input protocol=icmp action=accept /ip firewall filter add chain=input action=drop

Before installing or upgrading to Mikrotik 6.48.6, make sure to: Mikrotik 6.48.6 Download

. This requires booting the device into a special mode and connecting via a Windows PC. Architecture Matching Mikrotik 6.48.6 Download