Questions tagged [firewall]
a technological barrier designed to prevent unauthorized or unwanted communications between computer networks or hosts
1,242
questions
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answers
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How do I fix UPnP Port Forwarding on Ubuntu using miniupnp?
From what I understand, Transmission bittorrent client uses the miniupnp library to do it's UPnP port forwarding of routers, however on Ubuntu upnpc (a test client of the miniupnp library) doesn't ...
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3
votes
1
answer
2k
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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.
- 753
10
votes
1
answer
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Precautionary security measures for a home user? (firewall, antivirus, etc)
I just recently made the switch from Windows to Ubuntu, and I'm just a little paranoid when it comes to security measures.
I've looked around and from what I've read, security is not as big a concern ...
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vote
4
answers
1k
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Ubuntu One does not sync: firewall settings?
I'm new to Linux. I installed Ubuntu 11.04 on a partition and I love it, but Ubuntu One does not work. I created a free account and a directory Ubuntu One appeared automatically, as expected. I copied ...
8
votes
1
answer
775
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Getting Dynamic firewall from Fedora 15 into Ubuntu?
Just tried out Fedora 15 and noticed the pre-installed firewall application that I found much easier to use than any other previously tried out firewall manager.
Definitely miss it at my Ubuntu ...
- 1,698
5
votes
1
answer
363
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How do I accept inbound connections for a specific program?
Windows firewall allows to specify a program that will accept inbound connections no matter on which port(s) is listening (instead of specifying the port(s) to allow for that program). Is this ...
5
votes
2
answers
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System log error when running Firestarter configuration program
Running latest Ubuntu ver. 11.04. Using Firestarter firewall configuration (ver.1.0.3). When Firestarter is run, an error message is returned, "Failed to open the system log. No event information will ...
- 93
3
votes
1
answer
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Set up a GUI managed firewall for other machines?
What ways are there of setting up a firewall that can be managed with a GUI that allows you to firewall (filter*) incoming traffic routed to other machines?
Can GUFW do it? FireStarter? (or should ...
- 11.9k
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3
answers
4k
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Can I be notified about blocked connection attempts?
My computer is running Ubuntu 10.10 and I would like to know if there is a firewall that actively informs me when a certain program is trying to access the internet or when a connection attempt is ...
- 254
13
votes
2
answers
9k
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How to restrict user's access to the internet for time intervals?
I want that one of the users (not in the sudoers list) have Internet access from 14:00 until 16:00 and from 17:00 until 18:30. Is it possible? Can I set different time intervals for different week ...
- 1,919
81
votes
12
answers
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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 ...
- 1,181
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2
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How do I interfere with domain access?
I've just installed Self Control for Ubuntu.
It looks like it just tweaks /etc/hosts and defines some rules in iptables.
Some sites aren't getting blocked, and I think it's because they're ...
- 9,493
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2
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2k
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How to debug why server is blocking outsite requests
I install ufw, gufw & firestarter yesterday, but uninstalled them all today. Now, I find that I cannot access the server from outsite. When I could before. How can I debug whats blocking these?
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1
answer
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How to configure Firewall
How can I configure firewall for what I use as a web development server. I should be blocking all ports except 80 (HTTP), FTP, SSH? I tried configuring using ufw, gufw, firestarter but I ended up ...
- 1,965
5
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2
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Updating UFW (uncomplicated Firewall) doesn't affect existing connections
Can anyone tell me whether or not new or updated rules made to ubuntu (v10.10) UFW should affect existing connections? I have noticed that these only take effect the next time I try to reconnect, ...
Ellis
30
votes
6
answers
105k
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UFW firewall still blocking SMB despite adding rules
I have an Ubuntu PC with ufw firewall (GUI version). I have added the preset Samba service, in and out, and even tried adding the ports manually (135-139, 445, UDP and TCP, in and out), but it still ...
- 3,347
120
votes
5
answers
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See configured rules even when inactive
I'm wondering if it's possible to get UFW to list the configured firewall rules even when it's not enabled. I only have ssh access to the server at this time, and I don't want to enable UFW if there's ...
- 2,277
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2
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How can I use smbclient to connect to Windows shares by hostname when a firewall is enabled?
I can't connect to file shares on Windows computers using smbclient -L //hostname when the firewall is enabled.
This occurs whether I'm using ufw (which allows outgoing traffic and replies back in ...
user8979
2
votes
7
answers
9k
views
How do I open up firewall while keeping it safe?
Since I've installed Firestarter I have encountered connectivity issues that are all resolved by disabling the firewall. I'd prefer to have the firewall running and allow all the traffic I normally ...
- 21.1k
6
votes
3
answers
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Why UFW has to be (re)started at boot time if it's only iptables rule manager?
README from source package says:
When installing ufw from source, you will also need to integrate it into your
boot process for the firewall to start when you restart your system. Depending
on your ...
- 577
13
votes
8
answers
4k
views
80
votes
5
answers
75k
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Why is the firewall disabled by default?
Why is ufw firewall included in Ubuntu, when it is not enabled and pre-configured by default? Most users don't even know it is there, because no GUI frontend is provided.
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45
votes
5
answers
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How to block internet access for wine applications?
How can one prevent specific or any wine applications from accessing the internet?
When using certain applications under Windows, they were trying to access the internet from time to time without ...
- 2,349
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votes
5
answers
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Blocking Remote Login
Last night, I was shutting down my server and I saw a message asking if I wanted to shut down a "pts/0" session. Odd, I thought. So I logged back in and did a finger and saw that there was someone ...
- 531
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answers
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2
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2
answers
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Autostart Firestarter GUI on Boot?
Since Firestarter GUI needs Admin rights to start, does it make sense to autostart firestarter on boot and how can i do it?
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6
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2
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Does Ubuntu come with a firewall by default?
I have been told that Ubuntu comes with the firewall UFW. Is this true? Is there a GUI for it? If so, what is its name and where do I download?
Is it possible for UFW to notify us (like in windows ...
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votes
3
answers
304
views
Can I install a firewall interface without `menu`?
I need an interface for ufw (uncomplicated firewall) that does not depend on "menu", which is outdated and messing with software updates/installations. I don't mind building from source but prefer a ...
- 51.2k
31
votes
5
answers
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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 ...
pedroo
4
votes
3
answers
12k
views
Firewall Settings for Personal File Sharing
I have ufw set up to allow samba connections, but this does not seem to allow files to be transferred through Ubuntu's "Personal File Sharing" using the Public folder. The share can be seen, but not ...
- 4,638
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What does this UFW log mean?
CC-02 kernel
[ 399.656733] [UFW BLOCK] IN=eth0 OUT= MAC= SRC=192.168.2.11 DST=192.168.2.22 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=14158 DF PROTO=TCP SPT=47368 DPT=22 WINDOW=5840 RES=0x00 SYN URGP=0
...
user2814
3
votes
1
answer
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How to open ports for outside traffic? [closed]
I recently installed Ubuntu Server on an old machine, to set up a website with family photos etc. It is connected to the Internet via my home router (WRT160Nv2). I set the connection up with a static ...
Jan K
11
votes
3
answers
3k
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How can a non-geek set up a proper firewall?
Maybe a non-geek that knows of the existence of a firewall is already some kind of a nerd. If you have been a windows-user then it was rather easy to set up a firewall (I don't know if it was a good ...
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votes
5
answers
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How can I open a range of ports in ubuntu using (g)ufw
I have to open up a group of ports.
Adding the single ports to (g)ufw was easy enough but I can't work out how to open the range 11200-11299.
How do I do that?
- 965
2
votes
3
answers
767
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Is it possible to configure Ubuntu as a software firewall?
I have some systems running on Ubuntu in the private IP range 192.168.2.0-255 .
These systems are connected to a switch and the switch is connected to the ISP's modem.
Neither the switch nor the ...
- 5,365
37
votes
6
answers
204k
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How to enable ufw firewall to allow icmp response?
I have a series of Ubuntu 10.04 servers and each one has ufw firewall enabled. I have allowed port 22 (for SSH) and 80 (if it's a webserver). My question is that I am trying to enable icmp echo ...
- 677
3
votes
5
answers
4k
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Cannot ssh/ping an Ubuntu machine over WiFi
I have an Ubuntu 10.04 running on a laptop, connected to a local network via WiFi.
This machine does not respond to pings/ssh connect requests, as if it was firewalled. However, if I ssh from this ...
- 320
2
votes
1
answer
2k
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Ubuntu Linux UFW Firewall, Local Intranet Access
At home, I have Ubuntu server with the UFW firewall. What command do I type to turn on local intranet access to my web server, but keep the outside world out from my DSL modem?
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1
answer
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Ufw causing trouble with DHCP or WPA? [closed]
It appears that enabling UFW is causing my network connection to drop periodically on a WPA-Enterprise network, according to the network-manager GUI app (and the lack of a server response to web ...
1
vote
2
answers
976
views
Trouble with UFW blocking stuff from NAT machine to inside of NAT
I've got a NAT box (Ubu 10.04) running ufw with the following sudo ufw status verbose:
Status: active
Logging: on (low)
Default: deny (incoming), allow (outgoing)
New profiles: skip
To ...
8
votes
2
answers
10k
views
How to set up an Ubuntu 10.04 machine to accept ssh requests only from within the local network?
I am about to install 10.04 (from bare metal to replace 9.04) and I want to set it up so that I can shh into the machine, but only from other machines on my local network. (I.e., I want to reject all ...
- 1,400
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votes
5
answers
353k
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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 ...
- 691