Pptp vpn ports iptables orilc

May 16, 2013 · The following iptables firewall rules allow port 1723, GRE and perform NAT. iptables -I INPUT -p tcp --dport 1723 -m state --state NEW -j ACCEPT iptables -I INPUT -p gre -j ACCEPT iptables -t nat -I POSTROUTING -o eth0 -j MASQUERADE. In the last rule replace “eth0” with the interface connecting to the internet on your VPN server.

You need to allow the GRE protocol and the pptp port. iptables -A INPUT -p gre -j ACCEPT iptables -A OUTPUT -p gre -j ACCEPT iptables -A INPUT -p tcp --sport 1723 -s XX.XX.XX.XX -j ACCEPT Below is a list of some common VPN protocols and the ports that they use: PPTP (Point-to-Point Tunneling Protocol) – This protocol uses port 1723 TCP. L2TP (Layer Two Tunneling Protocol) – This protocol uses port 1701 TCP, Port 500 UDP, and port 4500 UDP. Apr 07, 2015 · [VPN] How to set up the ASUSWRT for VPN server – PPTP. Take “RT-AC87U with firmware v.3.0.0.4.378_4376” for Example. Category [VPN] How to set up the ASUSWRT for VPN server – PPTP [VPN] How to set up the ASUSWRT for VPN Server – OpenVPN [VPN] Introduction of VPN Client [VPN] How to set up the ASUSWRT for VPN Client; Content VPN (in the simplified MicroS*ft rras 56-but encryption client sense) is IP protocol # 47 (or GRE) AND IP protocol TCP port 1723. EX: assume for simplicity: iptables -P FORWARD ACCEPT then: echo ">>>--- setup nat VPN" iptables -t nat -A PREROUTING -i -p gre -d -j DNAT --to-destination

Jan 06, 2009 · PPTP Vpn through a Linux IpTables/Netfilter firewall I spent some time configuring a pptp vpn for one of our offices yesterday, but it kept failing to connect during testing. Each failure generated these errors in the firewall (the one I was Vpn-ing too) log.

PPTP vpn user port 47 aka GRE. To allow this traffic edit /etc/ufw/before.rules and add at the end of file. sudo nano /etc/ufw/before.rules this # gre -A ufw-before-input -p 47 -j ACCEPT -A ufw-before-output -p 47 -j ACCEPT Then disable, enable ufw. sudo ufw disable sudo ufw enable EDIT 1

Jul 11, 2018 · This ruleset replaces the pre-exiting iptables rules and instructs the firewall to drop every outgoing connection other than loopback traffic, the local network’s subnet and UDP traffic to and from your OpenVPN server’s IP on port 1194. Apr 24, 2019 · PPTP VPN: From the Port Forwarding screen, set Local Port to 1723 and Protocol to TCP for PPTP tunnel, and then set Port Range to 47 and Protocol to Other for GRE tunnel. OpenVPN: From the Port Forwarding screen, set Local Port to 1194 and Protocol to UDP for OpenVPN tunnel. Internet -> WAN IP:Port -> Forward to Client VPN IP:Port. So for instance, if I had port 6000 open on my client, a person could telnet in to x.x.x.x:6000, and the server would catch that and forward it to 192.168.3.100:6000. I have tried at least 20 different Googled up iptables configs and none have worked yet. Does anyone have any ideas, or Jan 17, 2010 · Just a handy little reference for myself. #Internal PPTP Server. vpnserver=”172.16.1.10″. iptables -N pptp. iptables -A pptp -p tcp –destination-port 1723 –dst $vpnserver -j ACCEPT. iptables -A pptp -p gre –dst $vpnserver -j ACCEPT. iptables -I FORWARD -j pptp. May 14, 2013 · A PPTP VPN server requires TCP port 1723 forwarded to the VPN server, as well as the GRE protocol (protocol 47). As the Smoothwall web interface doesn't provide functionality for forwarding the GRE protocol, you'll have to edit the firewall script. Editing the Firewall Script: