asked on
what ports are used by pptp
Hi, i have several snap gear pptp server (vpn) boxes in diffrent companies that i have remote users connecting into. the model is below.
http://www.cyberguard.com/products/firewall/SG_Family/SG300.html?lang=de_EN
lateley, some of the users using cable modems through adelphia (cable provider) have not been able to conenct to the pptp server on the device (the snapgear). i was unable to resolve the issue until i moved the users to dsl, then all worked fine. to aleviate the problem in the future i have decided to find out why.
question: what ports does the pptp connection need/require? maybee it depends on the security that i set from the begining, so i should have found out that and listed it here.
note, even on the cable users that cant connect to the more secure sites, i can connect to the above mentioned boxes that have lower security.
-thanks, dan
http://www.cyberguard.com/products/firewall/SG_Family/SG300.html?lang=de_EN
lateley, some of the users using cable modems through adelphia (cable provider) have not been able to conenct to the pptp server on the device (the snapgear). i was unable to resolve the issue until i moved the users to dsl, then all worked fine. to aleviate the problem in the future i have decided to find out why.
question: what ports does the pptp connection need/require? maybee it depends on the security that i set from the begining, so i should have found out that and listed it here.
note, even on the cable users that cant connect to the more secure sites, i can connect to the above mentioned boxes that have lower security.
-thanks, dan
NetworkingInternet Protocol Security
Last Comment
stevenlewis
ASKER CERTIFIED SOLUTION
THIS SOLUTION ONLY AVAILABLE TO MEMBERS.
View this solution by signing up for a free trial.
Members can start a 7-Day free trial and enjoy unlimited access to the platform.
oops- didnt see steven's post- must have showed up while I was typing.
LOL, NP conradie, happens all the time here :-)
ASKER
ok, StevenLewis is the winner, if i could milk this one a little bit more, are there ports used for the following encription types? if you dont awnser, ill still award you the victory, but if you could that would be great.
PAP (basic authentication)
CHAP (strong authentication)
MSCHAPv2 (stronger authentication)
MSCHAPv2 and Encryption (recommended - stronger authentication plus
it seems when i lower it down from mschapv2 with encription to chap, it connects fine, and it seems to be just at the cable sites.
thanks to you both....
PAP (basic authentication)
CHAP (strong authentication)
MSCHAPv2 (stronger authentication)
MSCHAPv2 and Encryption (recommended - stronger authentication plus
it seems when i lower it down from mschapv2 with encription to chap, it connects fine, and it seems to be just at the cable sites.
thanks to you both....
see if this might help
http://www.iss.net/security_center/advice/Countermeasures/VPN/PPTP/default.htm and his link from that page
http://www.microsoft.com/NTServer/commserv/deployment/moreinfo/VPNSec_FAQ.asp
and
http://www.microsoft.com/communications/nrpptp.htm
I have seen where it was neccessary to open port 500 for Ipsec
http://www.tomsnetworking.com/Sections-article49-page1.php
https://www.experts-exchange.com/questions/20917029/Port-to-turn-on.html
http://www.iss.net/security_center/advice/Countermeasures/VPN/PPTP/default.htm and his link from that page
http://www.microsoft.com/NTServer/commserv/deployment/moreinfo/VPNSec_FAQ.asp
and
http://www.microsoft.com/communications/nrpptp.htm
I have seen where it was neccessary to open port 500 for Ipsec
http://www.tomsnetworking.com/Sections-article49-page1.php
https://www.experts-exchange.com/questions/20917029/Port-to-turn-on.html
SOLUTION
THIS SOLUTION ONLY AVAILABLE TO MEMBERS.
View this solution by signing up for a free trial.
Members can start a 7-Day free trial and enjoy unlimited access to the platform.
Not trying to be a smartass but have a peak
http://www.google.com/search?hl=en&q=pptp+port&btnG=Google+Search
Don't even have to click any of the links. The summaries google creates even give you the answer.
http://www.google.com/search?hl=en&q=pptp+port&btnG=Google+Search
Don't even have to click any of the links. The summaries google creates even give you the answer.
ASKER
thanks guys, that helped.
-dp
-dp
Thanks!
Some routers have a specific option to allow PPTP or VPN traffic to pass, and you should use this instead of trying to open the ports manually.
Hope that helps!