IPTables D-NAT Firewall Rule Rumi, September 2, 2023 # Generated by iptables-save v1.3.5 on Tue Oct 28 23:57:58 2014 *filter :INPUT ACCEPT [2590:547311] :FORWARD ACCEPT [11426:731834] :OUTPUT ACCEPT [3989:328501] -A INPUT -i eth0 -j ACCEPT COMMIT # Completed on Tue Oct 28 23:57:58 2014 # Generated by iptables-save v1.3.5 on Tue Oct 28 23:57:58 2014 *mangle :PREROUTING ACCEPT [24964:3178001] :INPUT ACCEPT [9150:1450474] :FORWARD ACCEPT [11426:731834] :OUTPUT ACCEPT [4655:374193] :POSTROUTING ACCEPT [15415:1060335] COMMIT # Completed on Tue Oct 28 23:57:58 2014 # Generated by iptables-save v1.3.5 on Tue Oct 28 23:57:58 2014 *nat :PREROUTING ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :POSTROUTING ACCEPT [0:0] -A PREROUTING -m state -i eth0 --state RELATED,ESTABLISHED -j ACCEPT -A PREROUTING -p tcp -m tcp -d 123.45.67.89 --dport 80 -j DNAT --to-destination 172.16.5.113 -A POSTROUTING -j MASQUERADE COMMIT # Completed on Tue Oct 28 23:57:58 2014 Related Administrations Configurations (Linux) CentOSDNATiptables
NMAP Security Scanner on Linux August 21, 2015February 11, 2017 First of all, you should get the “nmap” package installed in your system. On CentOS yum install nmap On Debian apt-get install nmap On Ubuntu sudo apt-get install nmap NMAP Commands: sudo nmap -sS [IP address] or [website address] sudo nmap -O –osscan-guess [IP address] or [website address] sudo nmap… Read More
Creating A Linux Firewall using webmin January 12, 2009January 12, 2009 Here is what I need to do- I want to block ping on eth0- my external link I want to open everything else on eth1- internal link Let’s assume eth0- has public IP and eth1 has private IP I want to allow SSH, auth, httpd and certain protocols to eth0…. Read More
Publishing long domain key SPF TXT records in bind9 September 5, 2017 If your bind is throwing error with long TXT data, you can do the following means to concatenate: You are using commas to separate your key/value pairs in your record instead of semi-colons. Change it to: a9d04665528b593d263a6e5256648c99._domainkey IN 1800 TXT ( “k=rsa;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAz2/ZfhxSI/A” “bqgh0amM8ylrlosirWeKShUhq7fg12aYmRwOqq9hIzO0Fcz1BzfgHVu6HU++rC5” “QoUK0JQK/nk4jwkDgvG2di2ZYmAvEbY/VeiK1x/TG0p1Iczr2k6Bj0gEAb/YGD2” “YbwrwAi4bDXwoPsYuuNn9TB3jjyWKu/dvOsqhff1/4Wc+FkOi0ClvgrXiklN28X” “TLjyjSyU794ntIoegXxrfwcwkhfPMvuqcnhfIC0Z8L71M4WR4SoHyNHVfBtNlUv” “VNROiXlMxtxnNQvfViSwz6LC8bYIxeAba3hSXPTChKu3qZtfR0o3jFwEWAfLQdg” “Ixler0jMEoAyJmfQIDAQAB”) Related Read More