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 …
Forward port 514 to 5514 only from specific source ip with firewalld
willemdh asked: I’ve been trying to find a way to forward traffic from a specific ip, eg 10.17.1.3 on port 514 to port 5514 with firewalld on CentOS This works: …
iptables TRACE No chain/target/match by that name
pablochacin asked: I’m debugging the iptables for a kvm VM running a Buildroot image.When I try to set the following TRACE rule I get the error iptables: No chain/target/match by …
CentOS 7 iptables output does match output of firewall-cmd
Aren Tahmasian asked: Output of iptables -L -v -n does not match firewall-cmd –list-all-zones. Specifically, I’m looking for the forwarding rules I have in place for two virtual machines. They …