write the iptable command for linux

1. Block any and all traffic to/from a system. Good for quickly stopping any traffic to a system.

2. Allow traffic inbound to a DNS server on port 53 UDP from the local network (192.168.11.0/24)

3. Allow DNS server responses outbound on port 53 UDP to the local network (192.168.11.0/24)

4. Block traffic from a known bad IP address (64.90.64.90) on any port to the local system.

5. Allow common internet ports outbound from a workstation to anywhere: 80/443/53/25/110/143/67/68/123

6. Allow any traffic outbound from a workstation to an FTP server on the internet with a name ftp.internet.org

7. Why is this, by design, a conflicting rule: Allow established only NTP connections to a time server ntp1.time.org