a technological barrier designed to prevent unauthorized or unwanted communications between computer networks or hosts

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1answer
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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 ...
0
votes
2answers
248 views

How to stop firewall

I am new to Ubuntu. I am developer and working with maven3. I am unable to download dependencies from this site. When I tried in Windows it was a 404 exception but when I stopped my anti-virus it was ...
0
votes
1answer
2k views

What is the default ubuntu 12.10 firewall? [duplicate]

I have been trying to get ubuntu one to work (i.e. sync my files), but it keeps saying that it is "getting information" and "please wait". I only have 338MB used on my Ubuntu, so it shouldn't take ...
4
votes
1answer
271 views

blocking all outgoing ports and its consequences

Is this the right way to block all outgoing ports? : ufw default deny outgoing But what are the consequences of doing this on amazon ec2? I'm running possibly unsafe perl scripts on my instance and ...
2
votes
2answers
1k views

firewall ufw is “enable and active” but gufw is off

question concerning the ufw firewall : sudo ufw enable returns Firewall is active and enabled on system startup sounds fine, but when i start gufw after reboot, it is still off what does that ...
1
vote
0answers
93 views

Is there a firewall that blocks a process and shows a dialog with buttons Allow, Drop, Disable?

Currently I use ufw and Firestarter, and I'm just learning how to use a firewall. When I used windows there were a couple of firewalls that could block a process which tried to establish connection ...
1
vote
1answer
288 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 ...
0
votes
1answer
1k views

Problems allowing outgoing multicast in ufw

I am having problems configuring the uncomplicated firewall (ufw) to allow outgoing multicast traffic. I am blocking all in and outgoing connections as the default policy. I have supplemented with the ...
2
votes
1answer
313 views

IRC service and UFW firewall rules

I am securing my computer and have created same rules by utilizing UFW at CLI. My question is this, in order to allow IRC services with XChat 2.8.8, and because IRC service uses ports 6667 through ...
12
votes
3answers
94k views

How do I turn off the firewall in Ubuntu 12.04? [closed]

How do I turn off the firewall in Ubuntu 12.04? Thanks for the answers. The reason for turning it off was twofold: I often cannot make a wireless connectin to internet and get the server is unable to ...
2
votes
1answer
915 views

Which port does Ubuntu Software Center use?

I have installed the gufw firewall utility and want to make a whitelist of ports (want maximum security, but whitelisting single IPs is currently too tedious). I have so far only entered ports 53 (for ...
1
vote
2answers
1k views

How to disable Internet connection for a single process?

I know the PID of a specific process and I want to disable the Internet access for this process and only for this process, so other process can access Internet. Is there any way to do it? I ...
1
vote
0answers
69 views

How to load firewall before network?

How can I ensure iptables gets up before any network adapter gets up? And can network be stopped to be brought up if there is an error in the firewall rules? For exiting and future network adapters. ...
1
vote
1answer
438 views

ubuntu server: can't access apache hosted pages after changing ip

I moved my server to a different office. Since they wanted to access it, I joined their network by changing my server's IP. The server hosts LAMP + postgres. Now I can't get the basic web apps to ...
2
votes
4answers
2k views

issues in installation of mongo DB

I was installing mongo DB on my Ubuntu-12.04 system, but while i give the following command in my terminal apt-key adv --keyserver keyserver.ubuntu.com --recv 7F0CEB10 It gives me the following ...
0
votes
1answer
584 views

How to connect to a machine behind a firewall using VNC?

I am trying to connect to my computer in laboratory from home. I have installed Remmina on my laptop home and X11VNC server on the computer in the lab. When I have the laptop in the laboratory I can ...
3
votes
2answers
218 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 ...
1
vote
1answer
164 views

User to access only to specific IP addresses

How can I setup Ubuntu box so logged user can access only to several IP addresses, on all protocols? Additional problem is that Ubuntu uses proxy to acceess to internet. Tried with UFW, but did not ...
1
vote
0answers
599 views

How to change Port 27000 from filtered to open status

In my ubuntu box I am running flexlm licensing software on port 27000 and I am able to pull the license from the this port to run the simulation software locally. I am also trying to run the same ...
0
votes
1answer
2k views

Symfony2 - Apache vhost for app_dev different port

As I'm using url rewriting to access my Symfony2 application, it is directly available from http://my_application.my_domain.net Now I'd like to be able to access the dev environment simply using a ...
2
votes
1answer
498 views

How to pass traffic from static ip on my router through Ubuntu firewall to LAN ip

I have a router that has 5 static ip addresses set on it. These external static IP's are mapped to internal IP's on our LAN. We currently have no firewall or proxy set up, so I cannot monitor user ...
1
vote
0answers
160 views

ssh client times out to some servers, works on others

I have a strange problem and I'm not sure where to begin. My ssh client works on some servers but times out on others. Obviously, I checked that the servers are accessible via ssh from other ...
2
votes
1answer
185 views

Failed network lookup

I'm running Kubuntu 12.10. I am having three networking problems that I think might actually have a common cause, even though they are in apparently unrelated areas. I had them in 12.04 also: When ...
2
votes
1answer
4k views

How to allow remote connections to Flask?

Inside the system, running on virtual machine, I can access the running server at 127.0.0.1:5000. Although the 'remote' address of the vm is 192.168.56.101 (ping and ssh work fine), I cannot access ...
1
vote
0answers
491 views

Firewall stopped and disabled on system startup ERROR: problem running ufw-init

I am trying to set a VPN server on my PC (Ubuntu). I am following a tutorial , http://cviorel.easyblog.ro/2009/02/09/how-to-set-up-a-vpn-server-on-ubuntu/. I made changes in various files including ...
3
votes
1answer
1k views

Writing a simple firewall with iptables

I'm learning how to use iptables and I'm writing a very simple firewall on Ubuntu. Using just the filter table, I added the following rules iptables -P INPUT DROP iptables -P OUTPUT DROP iptables -P ...
1
vote
1answer
602 views

ufw configuration nat ppp0

please some tips how i can allow this request in ufw: [UFW BLOCK] IN=ppp0 OUT=eth0 MAC= SRC=10.11.22.2 DST=8.8.4.4 LEN=71 TOS=0x00 PREC=0x00 TTL=127 ID=52 PROTO=UDP SPT=59405 DPT=53 LEN=51 i tried ...
0
votes
0answers
422 views

How to find out what is blocking a port [on hold]

I have 3 machines: Machine A - local network Machine B - local network Machine C - external network Local network has a dynamic IP and Dyndns is set up to forward it. I have ssh on Machine B ...
1
vote
0answers
173 views

Ubuntu all versions from 10.04 till 12.10 [closed]

Is simply enabling the firewall ufw (sudo ufw enable) sufficient enough for protection of the OS ? I mean should extra rules be added for 'better' protection, or is simply enabling the firewall enough ...
10
votes
3answers
793 views

Replacing my firewall rules

I've had an init script for many years that configures iptables for me and it has worked like a champ until now. After upgrading from 10.04 to 12.04 I started having firewall problems where the ...
2
votes
2answers
616 views

List firewalls on the local machine

In Windows besides the Windows firewall a user could have installed a firewall program, or there is another service listening to that port. In Ubuntu how can I see what blocks/filters open ports? ...
2
votes
1answer
3k 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 ...
0
votes
2answers
266 views

How do I get my VPN to work even when my firewall is active?

I have subscribed to a VPN service, but it seems that it does not work whenever my firewall is active. I have up until now used Firestarter to configure my firewall, but it has no options for ...
1
vote
1answer
4k views

What GUI firewall manager should I use to replace Firestarter?

Apparently Firestarter is no longer maintained, and it does not have any options in its interface for handling the connection to a VPN. Right now, my VPN does not work if my Firewall is activated. I ...
0
votes
1answer
3k views

Port listening on localhost:8000 but not on ip:8000

Hello I'm running a web application on port 8000. When I access it from the host server localhost:8000 it responds ok, 127.0.0.1:8000 also works, but 192.168.1.7:8000 does not work. 192.168.1.7 is the ...
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votes
1answer
1k views

Firewall settings for VLC (streaming)

I'm watching online TV with VLC and http://mafreebox.freebox.fr/freeboxtv/playlist.m3u. Does anybody know which ports and protocol must be enabled in my firewall settings? I've been searching on the ...
3
votes
1answer
1k views

How to set up Wi-Fi Hotspot for sharing using 2 wired and 1 Wi-Fi network cards?

I have 3 network cards installed in my ubuntu 10.04 server and I want to configure Internet sharing and file sharing on eth1 for wired users and wlan0 for wireless users. Static ip: eth0: 192.168.1.1 ...
1
vote
1answer
464 views

Firestarter preventing Firefox accessing internet

I have recently had an issue with Firestarter preventing Firefox accessing the Internet. I have used Firestarter in the past with Hardy Heron and recently switched to Precise Pangolin. The policy ...
3
votes
1answer
2k views

Do I need to activate the firewall? I only use Ubuntu for a home desktop use?

I am a novice at Ubuntu (12.04). I have it on my netbook which I use mainly for surfing the net, learning python and remote desktop into my work computer. Do I need to enable a Firewall type ...
2
votes
1answer
456 views

Linux Firewall NAT Port Forwarding Issues

At my home I have a Linux server (it's only job is NAT, DHCP, and DNS) with Ubuntu 10.10 Server 64-bit. I have webmin installed on the server too, but I do know my way around a command line quite ...
1
vote
1answer
416 views

How do I set up user level restrictions on a gateway?

I am aware that Ubuntu Server can be used as a gateway to allow Internet connection to a LAN. Then we use IP tables or other firewall settings to restrict (for example), certain websites from being ...
1
vote
2answers
2k views

How do I find my firewall is blocking mysql?

I'm very new to Ubuntu. I couldn't able to connect to mysql via my programming language. I know all my property file in my code is correct. But still I couldn't able to connect to mysql. I guess my ...
0
votes
1answer
609 views

Firestarter exits after closing

I'm using Firestarter on Ubuntu 12.04. I configured Firestarter to run even after closing in the preferences menu. But still it exits after closing. It doesn't minimize to system tray.
2
votes
1answer
330 views

How can I prevent applications sending data over the net without my consent?

Recently I had a couple of instances of programs sending data (copies of some of my config files) out over the net. I consider this very bad form on behalf of the writers, and I want to prevent it ...
1
vote
2answers
587 views

Need a Firewall application similar to one that ships with Fedora

I've used Ubuntu since more than a year now, as the Oneiric Ocelot has more than exceeded my expectations and provides most things out of the box. However, there is one feature that both Windows and ...
0
votes
3answers
87 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 ...
2
votes
1answer
585 views

How do I block a protocol using iptables firewall

How to block a specific protocol using iptables firewall? For example block Yahoo messenger?
1
vote
1answer
16k views

Port seems to be open, but connection refused

I am trying to open port 3000 on Ubuntu 12.04, cause I have a web server listening there. I'm a bit out of my confort zone here, and spent many hours trying to solve the problem without success. Port ...
4
votes
2answers
600 views

What additional security measures should I apply for Ubuntu?

So on my Windows 7 install, I've got multiple free malware/virus scanners and a firewall up. But I've heard that Ubuntu (or Linux in general) is much more secure by default. So what additional ...
1
vote
1answer
2k 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 ...