Skip to content

Root Fan

Linux & Oracle DBA Blog

  • Home
  • Contact
  • About
  • Index

Category: Firewall

Posted on October 1, 2018April 3, 2022

Commands to Troubleshoot Ubuntu UFW

green trees surrounding lake

I was having problems with ufw not allowing me to add a new rule.

# ufw deny from 54.38.157.178 to any
ERROR: initcaps
[Errno 2] iptables: Chain already exists.

So this is what I did:

Continue reading “Commands to Troubleshoot Ubuntu UFW”

Unmissable Posts

  • Copy Password File From Primary ASM to Standby ASM on Oracle 19c
  • Oracle Exadata vs ExaCC vs ExaCS
  • Top 7 Oracle Wait Events Explained
  • Oracle 19c Data Guard Configuration Step by Step
  • How to Read an AWR Report in Oracle

Recent Posts

  • PostgreSQL High Availability with Patroni, etcd, HAProxy and keepalived
  • 5 Oracle to PostgreSQL Migration Projects That Failed (And Why)
  • Oracle to PostgreSQL Migration Best Practices: A Checklist for DBAs and Architects
  • Oracle to PostgreSQL Migration Cost: A Realistic Breakdown
  • Why Companies Are Leaving Oracle for PostgreSQL (And How to Do It Safely)

Categories

  • Apache
  • Exadata
  • Firewall
  • Linux
  • Oracle
  • Postfix
  • PostgreSQL
  • Security
  • Ubuntu

Unmissable posts

  • How to Read an AWR Report in Oracle
  • crsctl Commands Cheat Sheet
  • Exadata HCC Compression
  • PostgreSQL High Availability with Patroni, etcd, HAProxy and keepalived
  • Oracle Exadata Health Checks
  • PostgreSQL High Availability with Patroni, etcd, HAProxy and keepalived
  • 5 Oracle to PostgreSQL Migration Projects That Failed (And Why)
  • Oracle to PostgreSQL Migration Best Practices: A Checklist for DBAs and Architects
  • Oracle to PostgreSQL Migration Cost: A Realistic Breakdown
  • Why Companies Are Leaving Oracle for PostgreSQL (And How to Do It Safely)

Categories

  • Apache
  • Exadata
  • Firewall
  • Linux
  • Oracle
  • Postfix
  • PostgreSQL
  • Security
  • Ubuntu

EN
EN
ES FR

  • Facebook
  • Twitter
  • Email
Privacy Policy Proudly powered by WordPress