1
vote
2answers
316 views

iptables sharing internet connection with restricted access

I am trying to configure an ubuntu server to share internet access from eth0 to client systems on eth1 however I only want to allow access in/out on port 1688 and also resolve host names while ...
2
votes
2answers
4k views

iptables mac address filtering not work

I block every port default by ufw and add iptables rules like this: sudo iptables -A INPUT -p tcp --dport 1723 -m mac --mac-source 00:11:22:33:44:55 -j ACCEPT then I list iptables INPUT rules: ...
0
votes
1answer
306 views

Access VPN from home is fine but not outside via 3G

I'm a real Ubuntu newbie but at the school where I work I managed to install Ubuntu then install pptpd. I was feeling very pleased with myself when last evening from home with my Apple iPhone through ...
2
votes
1answer
1k views

No client internet access when setting up these iptables rules

I have read many other posts but cannot figure this out. eth0 is my external connected to a Comcast modem. The server has internet access with no issues. eth1 is internal and running DHCP for the ...