I am running Ubuntu 14.04 on a VPS for business purposes. The firewall is setup using ufw; testing reveals that it's working well. I'd like to further secure my server using techniques described here:
Are there any known conflicts between UFW and ipsets that might cause problems if I were to use ipsets to block malicious hosts attempting to probe my server for vulnerabilities? I understand that ufw makes configuring iptables simpler. My primary concern is the impact on ufw. Are there any known issues with using multiple apps to setup iptables?