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
I used Setup PPTP VPN Server on CentOS 6 guid to setup pptp vpn on my server. Every things is fine and vpn work without csf and iptables. But when i enable csf / iptables i can't connect to vpn server. I need this config to iptables: iptables -A INPUT -m state --state NEW -m tcp -p tcp --dport 1723 -j ACCEPT 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.
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Jul 09, 2020 · PPTP has been superseded by safer and more secure VPN tunneling protocols, including OpenVPN, L2TP/IPSec, and IKEv2/IPSec. How PPTP Works PPTP is an outgrowth of PPP, and as such, is based on its authentication and encryption framework. I have a PPTP server inside (green) a network. The old firewall was ipchains-based, and now it's iptables. I can't seem to figure out how to route GRE (protocol 47) and 1723 so that it works. Mar 19, 2017 · As PPTP VPN, the following ports need to be opened (bidirectional) on this firewall to allow VPN traffic to pass through: IP Protocol=TCP, TCP Port number=1723 <- Used by PPTP control path IP Protocol=GRE (value 47) <- Used by PPTP data path You may reference link below for more information about Ports affecting the VPN connectivity: http
I used Setup PPTP VPN Server on CentOS 6 guid to setup pptp vpn on my server. Every things is fine and vpn work without csf and iptables. But when i enable csf / iptables i can't connect to vpn server. I need this config to iptables: iptables -A INPUT -m state --state NEW -m tcp -p tcp --dport 1723 -j ACCEPT
2. Disable DHCP server on the DD-WRT, only if you want certain devices to access the internet via the VPN (This option you will need to set the static gateway IP on your device to that of the DD-WRT router) Click the ‘Services’ tab in the menu and select ‘VPN’ from the submenu bar. Click ‘Enable’ to ‘PPTP Client Options’ Posted June 22, 2016 By BrookDO. In order to block port 80, you would add this to your iptables shell script: # /sbin/iptables -A INPUT -p tcp --destination-port 80 -j DROP # /sbin/service iptables save Jul 09, 2020 · PPTP has been superseded by safer and more secure VPN tunneling protocols, including OpenVPN, L2TP/IPSec, and IKEv2/IPSec. How PPTP Works PPTP is an outgrowth of PPP, and as such, is based on its authentication and encryption framework. I have a PPTP server inside (green) a network. The old firewall was ipchains-based, and now it's iptables. I can't seem to figure out how to route GRE (protocol 47) and 1723 so that it works.