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Questions tagged [firewall]

Software that controls what connections can be made to and from a network.

To stop unauthorised access to your network from outside you need to have a firewall that monitors and blocks incoming traffic.

To stop unauthorised access from your network to the outside you need a firewall that monitors and blocks outgoing traffic. This type is a useful back up for virus and trojan detection as it should stop the malware "phoning home".

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How can I block a program from accessing the Internet?

I really want to know how can I prevent a program to connect to Internet with Windows 7 firewall? I have smart security nod32 business edition installed on my computer. should i do this job with nod or there is a way in Windows Firewall?
SilverLight
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What are Inbound and Outbound Rules for Windows Firewall?

Can anybody explain what are the inbound and outbound rules regarding Windows Firewall? What is their significance? Are they useful even when Windows Firewall is off?
Cute
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Why does the Mac OS X firewall dialog recurringly pop-up and disappear by itself (without letting me respond) under Snow Leopard?

From time to time, I'll be on my Macbook using a program that accesses the network – whether Firefox, or Sony's Reader Library – really, it seems like it could happen with any program that accesses the network – and for no reason that I can discern…
Chris W. Rea
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How can I turn off internet for roommates that haven't paid the bill this month?

I have several roommates who split my internet bill with me each month. On occasion they forget to pay me, and I have to pester them for the money. If after 3 days of pestering they still haven't paid, I create a firewall rule in my unix based…
spuder
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need iptables rule to accept all incoming traffic

For my test environment i want to accept all incoming traffic, can someone please give me the iptable rule to be added. My current iptables -L -n output looks like this Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT …
Ashish Kumar Shah
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What's the closest equivalent of Little Snitch (Mac program) on Windows?

I'm using Windows 7 and would like to have a feature like Little Snitch on the Mac that alerts you whenever a program on your computer makes an outgoing connection. Description of Little Snitch from its website: A firewall protects your computer…
Charles Scowcroft
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SSH access to office host behind NAT router

I would like to access the ssh port of my office linux host from home. Unfortunately the host is located behind a NAT router. So, the IP address is not publicly available. There is however access to another internet host (Server) which is…
ritter
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How can I configure the Windows 7 firewall to prompt me on outbound traffic?

Can I configure the built-in firewall in Windows 7 to ask me if I want to let a program open an outbound connection? I can disable all outgoing traffic and manually create rules for programs, but I can't find a way of letting the firewall prompt me…
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How to block all traffic but one IP in Windows Firewall?

I'm trying to use Windows 7 firewall to block all outgoing and incoming traffic, from all IP's and for all protocals, except for UDP to and from one particular IP address. The reason why is because I am using a VPN over UDP, and so no other traffic…
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How to tell which windows firewall rule is blocking traffic

I'm trying to set up a computer to accept all incoming traffic but only allow outgoing traffic to a specific IP. I have set an allow all rule for Incoming and an Allow rule that specifies an IP address as the only acceptable Outgoing address. I have…
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How to bypass web URL filtering service to access blocked websites (proxy)

I'm using network, where services such as Gmail or any other e-mails, Google Drive, Dropbox, all social networks are blocked. Basically my goal is to access simply GMail, but I couldn't find any way to do that so far. I understand that different…
kenorb
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With Linux iptables, is it possible to log the process/command name that initiates an outbound connection?

I would like to keep track of the processes that initiate outbound connections on a Linux desktop. The best I can come up with is this: iptables -A OUTPUT -m state --state NEW -j LOG --log-uid This logs the uid/gid that initiates the connection,…
Nack
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Utility to open TCP port to listen state

Is there some basic utility to open a specific network TCP port on my machine? I need to test how my program deals with ports in the listening state.
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How to detect if a network is blocking outgoing ports?

How do I confirm if my network is blocking outgoing ports? I'm having issues accessing services on servers running on ports other than port 80 and 443. For example, I cannot ssh into any of my servers where ssh is running on ports 22, 2222, 32415,…
Michael Altfield
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pf error - "No ALTQ support in the kernel"... What does this mean?

I am running Mac OS X. I would like to be able to configure pf because it seems to be more sophisticated and flexible than the default Mac OS X firewall that you can access through the System Preferences. I tried using some pf commands and got…
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