How to prevent remote access in iptables
polymath asked: I have iptables set up with docker-compose but my whitelisting of only the ip addresses I want doesn’t seem to be working as the server is still getting …
Blocking all ports except 80 and 443 with cloudflare
Googlebot asked: I try to block all ports except 22, 80, and 443. I added the following rules to iptables. *filter :INPUT ACCEPT [36878:18003219] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [33947:26518456] …
My VM backend server cannot see external IP routed with Iptables to VPN internal IP
Ecofintech asked: I am using Iptables to route https traffic from Internet to a internal network through HAproxy. The Iptables NAt rules are: iptables -i eth0 -t nat -A PREROUTING …
iptables DNAT change not showing up in Wireshark
QF0 asked: I want to re-route all incoming traffic on interface ens4f0 to IP address 192.168.50.10, but Wireshark is showing that the destination IP address on incoming packets is unchanged. …
How can I block all traffic to PlayStation network?
master lfc6 asked: Guys I have multiple servers with OpenVPN installed on them and they are all getting suspended left and right due to abuse reports from PlayStation network . …
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 …
Deleting iptables rule is erroring with illegal operation
BT643 asked: I’m new to iptables but I’m trying to remove a rule based on posts I’ve seen online using the following command: # /sbin/iptables -D INPUT 1 –protocol tcp …
Setting Up Fail2Ban
Abrar Hossain asked: I am new to fail2ban. I want to setup Fail2Ban such that it bans an IP for one hour on two failed login attempts. I have the …
Ipset with Iptables with large list of IP ranges (CIDR)
CvRChameleon asked: I have read some answers here about blocking IP address ranges, and have already used iptables for this purpose before. It is suggested to use ipset in combination …
nftables mangling without NOTRACK: what can happen?
Einheri asked: I’m experimenting with stateless NAT using nftables. On the page about statelessly mangling protocol fields, the author says: Keep in mind the interactions with conntrack, flows with mangled …