Web Development Tips

Hetzner - allow outgoing internet acess

Published by Vitaly Musin on June 11th, 2017

SRC IP = * SRC PORTS = 443 + 80 DST IP = * or Empty or your IP (go with what Falzo's says on leaving this undefined to test). DST PORTS = * PROTOCOL = TCP FLAGS = ACK + RST + FIN (i.e. NO SYN) [allows related/established traffic]

Proxmox - port forwarding

Published by Vitaly Musin on June 8th, 2017

On host machine run echo 1 > /proc/sys/net/ipv4/ip_forward && \ iptables -t nat -A POSTROUTING -s '192.168.1.0/24' -o vmbr0 -j MASQUERADE && \ iptables -t nat -A PREROUTING -i vmbr0 -p tcp --dport 10022 -j DNAT --to 192.168.1.3:22 && \ iptab...

Fast clear all IPTABLES Rules

Published by Vitaly Musin on June 1st, 2017

iptables -P INPUT ACCEPT && \ iptables -P FORWARD ACCEPT && \ iptables -P OUTPUT ACCEPT && \ iptables -t nat -F && \ iptables -t mangle -F && \ iptables -F && \ iptables -X && \ iptables -t nat -nvL

Linux port forwarding

Published by Vitaly Musin on June 1st, 2017

iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 1234 -j DNAT --to 10.x.x.x:1234

Easy firewall with UFW

Published by Vitaly Musin on May 29th, 2017

apt install ufw && \ ufw reset && \ ufw default deny incoming && \ ufw default allow outgoing && \ ufw allow ssh && \ ufw allow 80/tcp && \ ufw allow 443/tcp && \ ufw allow from 5.141.82.47 && \ ufw allow ntp && \ ufw enable && \ ufw status

Citrix XenServer Guest

Published by Vitaly Musin on May 25th, 2017

Select the VM in the Resources pane, right-click, and then click Install XenServer Tools on the shortcut menu. Alternatively, on the VM menu, click Install XenServer Tools. Click Install XenServer Tools on the message dialog to go to the VM's cons...

How add ISO to xenserver

Published by Vitaly Musin on May 24th, 2017

1. Make sure you have ssh access to your Xenserver.2. Download and install WinSCP on a windows machine or use native scp support on a linux box.3. Check if the folder “/var/opt/xen/iso_import"* exists. If not, you can create it using *mkdir -p /var/opt...

Clear all iptables records in one line

Published by Vitaly Musin on May 16th, 2017

iptables -P INPUT ACCEPT && \ iptables -P FORWARD ACCEPT && \ iptables -P OUTPUT ACCEPT && \ iptables -t nat -F && \ iptables -t mangle -F && \ iptables -F && \ iptables -X