3
votes
2answers
1k views

Why is ufw logging 'BLOCK' messages regarding a port for which ufw is configured to 'ALLOW' connections?

Here's an example log message: May 25 10:36:07 myserver kernel: [7057243.392334] [UFW BLOCK] IN=eth0 OUT= MAC=00:02:55:67:82:eb:00:06:b1:3a:ef:62:08:00 SRC=69.197.128.26 DST=192.168.100.101 LEN=44 ...
2
votes
2answers
3k 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
2answers
1k views

How to make an internet server as firewall using ubuntu 11.10

i have one static broadband connection which is coming to my Ubuntu server with 2 lan cards, there are 10 more PC's to which i need to provide internet connection through Ubuntu server as well as i ...
0
votes
2answers
595 views

Firewall configuration and consequences

I'm using Ubuntu 11.10. And I want to know something about firewall in Ubuntu, because I want to know if it could be the reason why my application doesn't work properly. Little background: I'have ...
2
votes
3answers
3k views

What Firewall, anti DDOS and anti Brute-Force managers exist in Ubuntu

I have heard of ufw and of course using iptables but is there any other firewall or port manager for incoming/outgoing connections. I am also looking for GUI based ones apart from terminal ones and a ...
7
votes
4answers
12k views

What rules to use for UFW?

I've decided to enable the UFW that comes with Ubuntu just to make my system even more secure (especially after watching a video of a person whose computer actually got infected!), and I've enabled ...
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 ...
7
votes
2answers
8k views

“FirewallD not running” error when trying to install a printer

When trying to add my printer in a fresh install of 11.10 I get this error message. What does it mean, and what do I have to do? It worked fine in 11.04 (with hplip).
1
vote
0answers
614 views

firestarter firewall will not start [closed]

After I installed firestarter on 11.10 and started it, it gave me some basic choices to configure the firewall. So I chose eth0 and no DHCP and then started the program. But it showed an error and ...