iptables rules to allow L2TP/IPSEC VPN behind firewall
(ip_conntrack_pptp+ip_nat_pptp or nf_conntrack_pptp+nf_nat_pptp on some recent 2.6 kernels) are not required for a masqueraded server. You may try the following rather simple ruleset (assuming eth0 is the Circumventing Path MTU Discovery issues with MSS Clamping Circumventing Path MTU Discovery issues with MSS Clamping (for ADSL, cable, PPPoE & PPtP users) As explained above, Path MTU Discovery doesn't work as well as it should anymore. If you know for a fact that a hop somewhere in your network has a limited (<1500) … Setup PPTP VPN Server on CentOS 6 - Vultr.com
I just set up a PPTP VPN server on the vps. Now I can connect my VPN server with windows 7 and I can ping/traceroute any websites successfully after VPN connection, but I'm unable to browse internet via VPN connection. It seems DNS works fine but data transfer or something on routing failed. BTW: /var/log/messages says:
iptables -t raw -A OUTPUT -p tcp \ -m comment --comment "!fw3: PPTP connection tracking" \ -m tcp --dport 1723-j CT --helper pptp. After completing all changes, power cycle the router for it to connect to the VPN provider. Go to LuCI → Network → Interfaces. Uptime and IPv4 address provided by VPN provider should be visible for the VPN iptables rules to allow L2TP/IPSEC VPN behind firewall
iptables -t raw -A OUTPUT -p tcp \ -m comment --comment "!fw3: PPTP connection tracking" \ -m tcp --dport 1723-j CT --helper pptp. After completing all changes, power cycle the router for it to connect to the VPN provider. Go to LuCI → Network → Interfaces. Uptime and IPv4 address provided by VPN provider should be visible for the VPN
Mailing List Archive: PPTP >A have a Gateway Gnu/Linux, Debian 3.0 rc1 with kernel 2.4.22, iptables >1.2.8-8 and freeswan 2.02 in São Paulo and i have another Linux in >Rio-de-Janeiro with Red-Hat 6.2, ipchains and the path-pptp. Clients in >São Paulo have to conect in Rio-de-Janeiro throught PPTP and the problem >its that the Server in Rio accepts only one connection. Linux IPTables: Incoming and Outgoing Rule Examples (SSH