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Router - TG582N - Firewall and Port Forwarding: Difference between revisions
Router - TG582N - Firewall and Port Forwarding (view source)
Revision as of 08:37, 18 June 2013
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= Problems connection to PPTP Servers =
One customer has reported problems connecting to PPTP VPN servers in either direction through a tg582n with the 8.4.7.0 firmware.
Technicolor have stated that this may be due to the Application Layer Gateway system intercepting PPTP packets even when the firewall is disabled and is a deliberate feature, but that the feature can be disabled by entering the following commands in the CLI:
connection applist
connection unbind application PPTP port 1723
saveall
However the same customer has reported that this solution has not actually fixed the problem and that the PPTP entry is still visible when running the "connection applist" command even after the unbind command has been successfully run.
(Another customer has been able to reproduce tho issue, unable to connect to swissvpn.net, etc. but does work using the alternative OpenWRT ADSL router instead).
After further testing with the help of Technicolor engineers we do have an actual fix for the PPTP problem.
The problem is that the default config leaves NAT turned on even when you are using real IPv4 addresses and it's not needed which leads to problems with PPTP when the packets are rewritten.
To get around this NAT has to be fully turned off with the CLI command
nat ifconfig intf=Internet translation=disabled
followed by
saveall
After that inbound and outbound PPTP should be working again.
PPTP & NAT? - We've seen problems when the client is behind NAT, and the ALG/NAT on the router not passing GRE through (or something) - on a Microsoft 2003 PPTP server, the client was getting timeout Error 721. The solution was to route a block of IPs for the LAN...
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