Firewall Stateful inspection questions
Posted on 2014-10-23
I am a system administration and would like to know some concept about Firewall Stateful inspection. We will create a firewall rule e.g.
Source IP port Destination IP Port
220.127.116.11 any 5..6.7.8 1433 (e.g. for SQL server)
1) When I submit the following firewall rule to our network department, do I need to submit any rule for the packet to coming back to the source ip (i.e. 18.104.22.168) assuming that a stateful firewall is between the two hosts ?
2) Another question is that if we submit the firewall rule update as below related to ICMP and UDP do I need to submit any rule for the packet to coming back to the source ip (i.e. 22.214.171.124) still assuming stateful firewall is between the two hosts as I know ICMP and UDP are stateless protocol ?
Source IP port Destination IP Protocol
126.96.36.199 any 5..6.7.8 ICMP or UDP
Thank you so much for your technical view in advance.