a technological barrier designed to prevent unauthorized or unwanted communications between computer networks or hosts
0
votes
0answers
11 views
Wifi hotspot service on Precise without disabling ufw firewall?
I've been using 12.04 LTS for a while, and for my own sanity and security, I've configured my ufw firewall to deny all incoming, and for outgoing just allow these ports:
TCP 80, 443 for web-browsing
...
0
votes
0answers
43 views
ufw firewall operation
I have always run the program UFW as my firewall in Ubuntu, and been satisifed with its performance. When I installed Ubuntu 13.04, and enabled ufw, I was not able to access the internet, and all ...
2
votes
1answer
25 views
Open ports for development purposes
I'm doing some Java ME Development in my brand-new Ubuntu laptop, coming from a now replaced Windows Vista one.
What I'm trying to do is run a Mobile Simulator that acts as an HTTP Server -receives ...
0
votes
0answers
29 views
How can I open ports on ubuntu server?
Hello I am running my server and since the ip is not static (my ISP won't give me one because I need to be a commercial customer) I have to use a service like DynDNS but the site is only accessible in ...
-1
votes
0answers
21 views
How does a firewall protect an Ubuntu server? [duplicate]
Since a potential attacker will exploit the services that are already open to public by firewall rules, how will a firewall protect my server from attackers?
3
votes
1answer
246 views
How can I block a range of IPv6 addresses?
Are there any IP blocking applications or firewalls that support IPv6?
The ones I know about (pgld, moblock (sunset?) , nfblock, iplist (looks old)) are only for IPv4.
5
votes
2answers
6k 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).
0
votes
0answers
26 views
Configuring a firewall to drop idle connections after 30 seconds
I'm trying to reproduce a bug with gvfs that normally only happens after an hour or two. But I'm trying to make it happen after just 30 seconds so that I can work on a patch.
Basically I'm trying to ...
1
vote
1answer
100 views
Migrate Debian firewall rule to Ubuntu
My old Debian firewall died and I'm migrating saved rules to Ubuntu this way:
iptables-restore < firewall_config
I get this error:
Bad argument `192.168.1.0/255.255.255.0'
Error occurred at ...
1
vote
0answers
130 views
Configure Firewall to Take Confirmations
I want to have a firewall program for my Ubuntu 13.04 which will ask me for confirmations when a program wants to connect to the Internet. It should have options like Allow, Block etc. So is there any ...
1
vote
1answer
1k views
Installed Xubuntu desktop on Ubuntu 12.04 server and now can't connect via SSH
I have a ubuntu 12.04 server that I could connect to fine using ssh over the internet. I installed the xubuntu desktop on it, didn't change any settings, then suddenly ssh stopped working.
I can ...
0
votes
2answers
36 views
If I have Ubuntu installed along side Windows, does the firewall on Windows work along with the antivirus system?
I have Ubuntu installed on my Windows 7 computer. I was curious to know if the firewall on that one is activated (I have to turn it on each time I'm on the computer) along with the antivirus system, ...
0
votes
0answers
24 views
Cannot get Samba past firewall
I have two interfaces. One (eth0, 192.168.1.x) is my network, my internet connection. I pay for my own because of bandwidth issues. The other (eth1, 192.168.0.x) is the other occupants' LAN that I ...
2
votes
1answer
1k views
Firewall settings for Dropbox LAN sync
I have two Ubuntu 12.04 computers on a wireless home network, kept in sync using Dropbox. I use Dropbox rather than Ubuntu One because of its LAN sync feature - preferable to doing everything via the ...
2
votes
1answer
30 views
How do I allow local subnets in ufw?
I recently got IPv6 connectivity at home and now I would like to allow connections to my home server via IPv6 from the LAN only. The trick is that the IPv6 address/prefix assigned to the server is ...
1
vote
1answer
46 views
Unable to connect through Java programs in Ubuntu
I am unable to connect to any host through Java programs, getting
java.net.ConnectException: Connection refused.
Does it have anything to do with Ubuntu firewall configurations or any other ...
0
votes
1answer
93 views
UFW 'default deny incoming' doesn't work
I have UFW enabled, 'default deny incoming' set and no any additional rules, but I still can access all ports from other PCs.
I have to manually block each port. What can be wrong?
0
votes
0answers
28 views
Running wifi hotspot on 12.04 without stopping the ufw firewall?
I've been using 12.04 LTS for a while, and for my own sanity and security, I've configured my ufw firewall to deny all incoming, and for outgoing just allow these ports:
TCP 80, 443 for web-browsing
...
14
votes
3answers
244 views
What automated intrusion notification/detection setup is good for home desktop use?
I've been using Linux for quite a while now and I always feel the need to have a passive software / script setup which can alert me of any suspicious network activities like scans, failed login ...
0
votes
0answers
22 views
Allow hotspot service to run on Precise without compromising the firewall?
Well, I've been using Ubuntu 12.04 LTS for a while now, and for my own sanity and security, I've configured my ufw firewall to deny all incoming, and for outgoing just allow these ports:
TCP 80, 443 ...
10
votes
2answers
18k views
How do I know if my firewall is on?
I installed Firestarter, and configured my firewall.
But I'm in doubt : On boot, I sometimes see a [FAIL] marker, and to the left, I guess it was something like "start firewall". I can't be sure ...
1
vote
1answer
151 views
Setup firewall: ask user to allow new incoming/outgoing traffic?
I'm using Ubuntu 12.10 and as I know there is already a firewall on any ubuntu system. It's ufw and because I like fancy gui stuff I can use gufw, that's very nice.
Now I would like to configure this ...
1
vote
1answer
514 views
How to set fail2ban with apf?
I just installed fail2ban and the apf firewall. Those 2 seems to be not working together. Fail2ban have added some ipatble rules but they are not working. When I issue "/etc/init.d/iptables status" ...
0
votes
1answer
120 views
How do I configure ufw to only allow outgoing/established connections for a IPv6 network?
How do I configure ufw to only allow outgoing/established connections for a IPv6 network?
I am using an old computer with 12.04 installed to create an IPv6 router for my local network. I would like ...
1
vote
1answer
123 views
What could be the cause for these strange UFW block entries in my syslog?
I've recently noticed a large number of recurring UFW blocks in my syslog. This surprised me as I have no UFW rules set:
$ sudo ufw status verbose
Status: active
Logging: on (low)
Default: deny ...
6
votes
2answers
2k views
What do UFW's audit log entries mean?
I'm sometimes getting a lot of these AUDIT log entries in
...
[UFW AUDIT] IN= OUT=eth0 SRC=176.58.105.134 DST=194.238.48.2 LEN=76 TOS=0x10 PREC=0x00 TTL=64 ID=32137 DF PROTO=UDP SPT=36231 DPT=123 ...
3
votes
2answers
117 views
Hourly events in the firewall-log, originating from Ubuntu12.04-box. How to find the reason? [duplicate]
Possible Duplicate:
How do I disable Online Videos in the Unity Dash?
every hour, the logfile on our firewall (IPCop 1.4.20, 192.168.1.8) lists nine lines, apparently caused by my Computer ...
5
votes
2answers
154 views
Reverse Firewall or Application Firewalls?
Firewalls are typically employed to prevent bad "packets" coming in from the outside world. But these days we are mostly behind routers and a lot of that danger is mitigated by the router. The danger ...
0
votes
0answers
41 views
gufw set to “deny incoming” and “deny outgoing” still allows me to use internet with browser, what gives?
I've been trying to setup gufw. I would have thought that if I denied outgoing and incoming I should not be able to do anything outside of my local computer... but I still can use the internet, etc. ...
3
votes
2answers
207 views
Error message when entering iptables command (table does not exist)
I have been trying to install Spotify, but when logging in I get a message saying I have an error 101. This appears to be related to either my proxy settings or to my firewall. Following instructions ...
0
votes
2answers
100 views
Forward [open] Ports 7777; 2106
Hi i am new to Ubuntu (12.10) x64
Trying to forward ports for gameserver on my pc (Lineage II)
Ports are opened in UFW
Ports are opened in my Router
Even if i disable UFW others still cant login to ...
0
votes
3answers
78 views
APT downloading without my consent
I installed natty (11.04) and wanted to play a video.
Went through the process the cancelled because it was slow and files were relatively large unstable and it was late .(Internet very expensive for ...
-1
votes
4answers
88 views
Simply safe internet access
Is it necessary to configure a firewall like iptables or firestarter
when the goal is only to surf safely?
For me, there is no need to open any port (i.e. samba, etc.).
2
votes
1answer
134 views
How can set these iptables rules to run at startup
I usually run my iptables rules whenever I login. From the terminal I type ;
sudo sh firewall.sh
Setting up my sister's computer, I want to give her some basic firewall protection. She wont be ...
9
votes
6answers
6k views
How to control internet access for each program?
I would like to use a software to control which program may connect to the internet. I know that this behaviour is associated with the word "firewall", but some Linux users are very upset if somebody ...
4
votes
2answers
100 views
Is it possible to block a webpage using ufw?
basically I have two machines X and Y.
I want to block "http:// <IP-of-Y-Here> /AFolder/" from machine X on HTTP port 80 using ufw.
Trivially, this can be completed (awfully) using ufw ...
1
vote
0answers
95 views
How I can connect the syslog-ng with a mysql database?
Hi guys I want to use a syslog-ng server for logging data from the firewall and I get Data from the Firewall in the file /var/firewall.log but now I want that the logs go to a database. For this I ...
4
votes
4answers
241 views
How to protect Ubuntu12.10 from Viruses, Spywares, Spamware and Intruders?
I have been using Windows OS for a long time and there i needed to install a separate Anti virus Program (included with firewall, anti spam) etc..
With my mentor's recommendation, I have replaced ...
0
votes
1answer
110 views
How do I firewall my computer so that only traffic go through the VPN?
I have read "How to configure an Ubuntu server so that all traffic goes through a VPN?" and found it doesn't apply to my case. I am only interested in the client-side of the VPN connection as I am a ...
0
votes
1answer
109 views
Firefox cannot find website servers, what is wrong?
Recently, I tried to access the internet using Firefox. I have a good wifi signal according to the toolbar at the top, but Firefox says "Firefox can't find the server atwww.example.com." I tried ...
1
vote
1answer
118 views
How to allow PPTP VPN access through APF firewall
I'm attempting to connect to a PPTP VPN. I have opened ports 47 and 1723 in the ingress rules. When APF is turned on, it fails. When APF is turned off, it works fine. I have turned on as many logging ...
0
votes
0answers
19 views
How to make Firestarter resolve hostname each time? trying to deal with connecting w/dynamic ip
I'm trying to connect to ubuntu running firestarter with a cell phone. My ip changes so i dealt with that with no-ip and the first time i connect, everything is fine. But if my ip changes, and i ...
0
votes
3answers
2k views
Is the firewall active or not?
I'm confused about the status of my firewall. Using the Ubuntu Software Center, I have installed Gufw.
Problem:
When the Firewall is locked, it looks like it's inactive. But when I unlock it, it's ...
0
votes
1answer
71 views
Want some advanced configuration with ufw
I've read the ubuntu developer docs regarding the ufw here, but couldn't find what I was looking for. It allows me to set rules for controlling in/out traffic based on source IP or port numbers, but ...
15
votes
5answers
3k views
Is there a preinstalled or automatic firewall?
Does Ubuntu come with a preinstalled or automatic firewall? If not, do I need one?
I've read some articles about the advantages of linux over other operating systems about security (no need to have ...
0
votes
2answers
72 views
Updating 10.10 to the latest version through a firewall [duplicate]
I've had Ubuntu 10.10 on my server since I bought it several years back. I've tried to upgrade in the past but I'm always thwarted by my company's firewall. I receive messages like these:
W:Failed to ...
42
votes
8answers
2k views
What are the risks of NOT using a firewall (home computer)?
Since a password is required to be a superuser (to install and modify programs), what are the risks to not use a firewall under Ubuntu ? More particularly if I am using a NAT router ?
1
vote
1answer
142 views
using proxy with online flash games
when I try to play this flash online game "tankionline.com" using our university proxy I get this error "Cannot establish connection (host: 62.152.57.11, ports: 4444,5190,5223,5222,5050)".
In windows ...
0
votes
1answer
48 views
block outgoing internet calls from inside a container
This question is not similar to my earlier post. This is pretty simple I think, I just don't know enough about networking and the ubuntu firewall.
I followed this article and setup a linux container ...
2
votes
1answer
248 views
Why can't I allow access to port 22 on Ubuntu 12.10?
I can't seem to figure out why port 22 will never let me ssh into my laptop. Here's what I'm trying:
ryan@gigantic-laptop:~$ sudo ufw status
Status: active
To Action ...
