DNAT to another hidden port on same host
user12304836 asked: I am hoping to use iptables to silently redirect incoming traffic arriving at a privileged port on the public eth interface (public IPv4 address) to a hidden unprivileged …
VoIP and NAT (and blocked ports)
Bastien Matthai asked: I’m making a VoIP application and I have trouble to make it working properly. On each side there are SIP clients. In my office, we use 2 …
Debian 10.6 Tayga package missing in ISO default repository
Tobias H asked: I’d like to implement NAT64 on my Debian Linux server running on non-internet connection. But it seems that the Tayga package is not in the local repository. …
Wireguard not completing handshake
Lucio Crusca asked: I have two Debian GNU/Linux systems (bullseye/sid), both running wireguard on port 33456, both behind NAT. Both run a kernel version > 5.6. System A is the …
IPTables source NAT (SNAT) to /etc/ufw/before.rules
Tim asked: I have a need to source NAT (SNAT) traffic between two interfaces in an Ubuntu 18.04 server. I’ve been trying to use the ‘/etc/ufw/before.rules’ file to implement my …
iptables configuration & logging of dropped packages due to missing ports when using masquerading
Phylu asked: I am setting up iptables for natting of multiple hosts in a server cluster. There will be connection bursts from multiple servers usually to a single system. The …
How can I setup NAT on my OpenVPN Server for the client?
Mohi asked: I have created a VM instance in Oracle Cloud to use as my OpenVPN server. I am able to connect my client (Android phone) with the server but …
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 …
Router's Parental Controls Really Block All Internet Traffics?
RRN asked: I am using Asus 4G-AC53U router. When I turn ON “Parental Controls” to block a client’s Internet access, does the router really block ALL kinds of Internet traffics …
different firewalld rich rule behavior in kvm host compared to kvm guests
J D asked: I have a CentOS 7 KVM host with a single public IPv4, which is housing multiple guest OS’s and acting as a firewall / gateway for guest …