Search result for 'Troubleshooting'

This runbook is designed to methodically diagnose and resolve server connectivity issues. It caters to various scenarios, from simple DNS problems to more complex network or hardware failures

• Objective: Verify if the server is reachable.
• Outcomes and Actions:

1. If Both Hostname and IP Address are Pingable: The issue may lie on the client side, as the server is reachable. Inve...

• Objective: Determine if the issue is isolated to the server or affects the wider network.
• Action: Ping another server within the same network.
• Outcome:

1. FalseLinuxTroubleshooting

• Objective: Assess server's network configuration and operational status.
• Actions:

1. Virtual Console Check
2. Network Interface and IP Configuration

• Objective: Ensure there's no physical disruption to the network connection.
• Action: Perform a physical inspection of network cables and hardware. Verify the link lights on the network interface card (NIC).

• Objective: Identify misconfigurations in DNS settings.
• Checks:

1. /etc/hosts: cat /etc/hosts
2. /etc/resolv.conf: cat /etc/resolv.conf
3. /etc/nsswitch.conf: cat /etc/nsswitch.conf
4. ...

Log into the server via virtual console. Check if the server is powered on and operational by verifying its uptime.

Action: Ensure SELinux is not blocking access to the service/server.

Command:

• sudo iptables -L (for iptables)
• sudo firewall-cmd --list-all (for firewalld)