WebJun 9, 2014 · To allow outbound packets from your SSH daemon to the SSH client you need to add the following rule: iptables -A OUTPUT -p tcp --sport 22 -j ACCEPT. You might also want to add destination IP criteria to the above rule, if you are only connecting from a single location. This rule needs to come before the ultimate 'DROP anything else' rule for ... WebMar 18, 2024 · iptables -A INPUT -p tcp --dport 22 -j DROP NOTE: My “INPUT” chain is being used only for SSH. I use Cloudflare Zero Trust for web access. If you have more rules in the “INPUT” chain, make sure you update the script. I put the line below in the crontab, it makes the script run daily: @daily /opt/scripts/iptables-Cloudflare.sh Thank you.

How to allow only ssh and internet access with iptables?

WebApr 30, 2024 · sudo iptables -A INPUT -p icmp --icmp-type any -j DROP sudo iptables -A OUTPUT -p icmp -j DROP Allow established connections: sudo iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT Allow SSH: sudo iptables -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT Default policies: WebSep 10, 2012 · CloudFlare helps protect the website then by filtering out threat traffic. It’s a good piece of the defense in depth strategy. However, this service is of little benefit if … incline anthem

How to drop 10 million packets per second - The Cloudflare Blog

WebJun 21, 2012 · Only allowing traffic from Cloudflare. I am new to Linux System Administration and I am experimenting with iptables trying to learn how to really lock … WebSep 13, 2024 · So here’s how to make sure only Cloudflare can talk to your web ports. 1. Install ipset, which is a utility that lets you create text hashes that can be used with firewall rules. apt install ipset 2. Create the firewall object “cf4” ipset create cf4 hash:net 3. Populate that object with Cloudflare’s list of IPv4 addresses. Web7 hours ago · PostUp = iptables-A FORWARD-i % i-j ACCEPT; iptables-A FORWARD-o % i-j ACCEPT; iptables-t nat-A POSTROUTING-o wg0-j MASQUERADE. ... Spending Hours Making it Work with Cloudflare ; ... These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. incline alternating chest press