1. HARDWARE
1.1. PALO ALTO
1.1.1. Managed by Enterprise Network Security Team
1.1.2. By default they will block all inbound/outbound connections using Palo Alto firewall and allow based on Request.
1.1.3. Request Submission Procedure : https://collaborate.td.com/display/NETSEC/How+to+Submit+Requests+to+Add+or+Change+Global+and+Pre-Approved+Rules
2. SOFTWARE
2.1. IPTABLES
2.1.1. Supporting By PSS and IPD
2.1.2. Update / Modify using valid CO/ JIRA Req
2.1.3. It's Used for restriction connections and allowing Hadoop Component ports between Hadoop nodes
2.1.4. Configurations
2.1.4.1. conf file /etc/sysconfig/iptables
2.1.4.2. Managed Through Salt
2.1.4.3. Any Config update need to raise request to IPD team.
2.1.4.4. Service check /etc/init.d/iptables (start/status/stop)
2.1.4.5. List configured rules using below command Iptables -L
2.1.5. Logs
2.1.5.1. /var/log/messages