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How Do I Create a Firewall Rule in Linux?

Maya Lin-Takahashi • • 5 min read
How Do I Create a Firewall Rule in Linux?
Contents

How do you write firewall rules in Linux?

Firewall Rule Parameters

  1. Indicates the protocol for the rule.
  2. Possible values are tcp, udp, icmp.
  3. Use “all” to allow all protocols. …
  4. Use either the name (for example: tcp), or the number (for example: 6 for tcp) for protocol.
  5. /etc/protocols file contains all allowed protocol name and number.
  6. You an also use –protocol.

14 февр. 2011 г.

How do you set firewall rules?

How to Configure a Firewall in 5 Steps

  1. Step 1: Secure your firewall. …
  2. Step 2: Architect your firewall zones and IP addresses. …
  3. Step 3: Configure access control lists. …
  4. Step 4: Configure your other firewall services and logging. …
  5. Step 5: Test your firewall configuration. …
  6. Firewall management.
Maya Lin-Takahashi
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Maya Lin-Takahashi

Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.