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Questions tagged [firewall]

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

A firewall is a device or set of devices designed to permit or deny network transmissions based upon a set of rules and is frequently used to protect networks from unauthorized access while permitting legitimate communications to pass.

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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 because the message is seen for less than a second,…
paercebal
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How do I turn off the firewall in Ubuntu 12.04?

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 connect message or I get a message that…
dustbindiva
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How to open a port?

I have ubuntu 12.04 and I'm not able to allow certain port in my firewall. So I basically said I will allow everything but it's still not working. Please help. nmap on this machine from other machine says: $ nmap host_name Not shown: 996 closed…
Mohammad Moghimi
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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 days?
cupakob
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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 one!): enable a firewall with maximum protection.…
Bernard Decock
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Do I need a firewall for my desktop?

I don't have a router, but I mostly use my desktop for online shopping and torrenting. So, do I have to enable the firewall? I hope not, because I'm really dumb and I don't think I will be able to configure the firewall.
Bob
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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 workstation, so how can I get it?
Industrial
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Firewalld does not start at boot

I have installed firewalld and uninstalled ufw with the following commands: sudo apt install firewall-applet sudo systemctl start firewalld sudo systemctl enable firewalld It works but does not start on its own on restart. $ sudo systemctl status…
user68186
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Block internet access and keep LAN access - Firewall

I want to update my firewall, so I want to create my own chain that block the access of the internet but keep accessing the LAN network. How can I do that?
Noux
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Securing Riak using Shorewall Firewall

I want to set up a Riak Cluster for a Web project. However, I want to secure this cluster so that only My Web Server(s) can access Riak Cluster. Basically, I will have one or more Web Servers and 4 Riak servers (in a cluster). I want to use…
Charles
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Ubuntu UFW 3x specific IP addresses only to access a specific port

I need to use UFW to allow only 3x different IP addresses to connect on a specific port. Ex: IP address [1] - 111.111.111.111 IP address [1] - 222.222.222.222 IP address [1] - 333.333.333.333 on a specific port. All other connections denied. Any…
maljam
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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, which doesn't seem to me the way a firewall should…
Ellis
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1 answer

Web Interface for Firewall?

Is there any web based firewall available for Ubuntu servers which offers options like this one:
Faqahat Fareed
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Currently what is the best Firewall & Internet security for Ubuntu?

Currently what is the best Firewall & Internet security for Ubuntu?
Ali
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ufw is enable but still be able to surfing web

I enabled ufw as a security practice. And let the default setting intact. I noticed that I still be able to access internet using web browser, so I tested the firewall with transmission. Transmission reported the port was closed. Then I allowed the…
Tri Quoc Nguyen
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