What would the following IP tables command do? IP tables -I INPUT -s 99.23.45.1/32 -j DROP

The -I INPUT flag inserts a rule at the top of the INPUT chain, which processes inbound traffic destined for the local host. The -s 99.23.45.1/32 specifies the source IP with /32 CIDR notation targeting a single host, and -j DROP silently discards all matching packets. Together these flags block all incoming traffic from that specific source address.

The -I flag inserts a rule into a chain and does not forward or deliver packets to an address - there is no iptables action that 'inputs packets to' a destination.

Logging in iptables requires the -j LOG target; this command uses -j DROP, which silently discards packets without generating any log entries.

The -s flag specifies the source address, not the destination; to match destination traffic the -d flag is used, so this rule affects traffic coming FROM 99.23.45.1, not traffic going TO it.