Cloudflare behind site iptables not blocking HTTP and HTTPS ports
Chathu asked: When the Fail2ban trigger an IP ban action, I want to block all the ports on my Ubuntu Server. Right now, I use banaction = iptables-allports and CSF. …
Network activity through port 17500
ishahak asked: I’m trying to track network activities on my machine running CentOS-7. According to iptables logs, I’m getting many inputs from unknown machines into port 17500. Is there any …
Limiting total number of incoming connections for a port with iptables for high loading server
someone asked: I have a server program listening on a port, and I want to limit the total number of incoming TCP connections for the port. I tried the following …
NUMIPTENT is too low to add 5333 rules (CSF firewall error)
Horace asked: The VPS iptables rule limit (numiptent) is too low to add 5333 rules (19469/24000) CSF stopped working spontaneously today. Saying it can’t start because it can’t add 5333 …
iptables egress firewall works with IPv4 but not with IPv6
TommyPeanuts asked: I have a server running Ubuntu 16.04 with an application that only needs outgoing connections for package updates and NTP time syncing. It has a dynamic IPv6 address …
IPv6 firewall on Linux router
Syn Romana asked: I have IPv6 tunnel (he.net) on my NAT router. I also have a simple firewall and routing setup to allow hosts behind the router to use IPv6 …
Issue insulating docker containers
Ricardo Mendes asked: I have a question, I have the following iptables config: [[email protected] ~]# iptables -L INPUT –line-numbers -n Chain INPUT (policy DROP) num target prot opt source destination …
Why does firewall-cmd throws error "ALREADY_ENABLED" but is the port not listed when calling firewall-cmd –list-ports?
user007 asked: I am trying to use firewall-cmd to add 443 to my allowed ports. Unfortunately this throws error ALREADY_ENABLED: 443:tcp. But when I use firewall-cmd –list-ports it does not …
Firewalld kills iptables
Kandrat asked: I have centos7 with installed firewalld and fail2ban. When i’m start firewalld(service firewalld start) it kills iptables (and starting iptables kills runing firewalld). Can i remove iptables and …
Ansible open port on iptables
Farrukh Sadykov asked: Currently I am changing the port for remote machine. I also have to allow the firewall rules on Centos 6.9. The folling is my command to open …