A firewall is a piece of software that controls what connections can be made to and from a network.

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1answer
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Create firewall “profiles” for Windows 7 [duplicate]

Possible Duplicate: Limiting network connections to specific sites when travelling / tethered (in windows) Is there any way to configure a couple of firewall profiles in Windows 7? As I ...
12
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6answers
5k views

Does the Virtual PC XP Mode need safety measures?

Does the Virtual PC XP-Mode (or any other virtualized mode) require safety measures, such as antivirus or a firewall? I'm just wondering if the XP-Mode would be a large security loophole, since it's ...
17
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7answers
17k views

“iTunes.app” to accept incoming network connections?

Every time I open iTunes I get the the following warning: Do you want the application "iTunes.app" to accept incoming network connections? Clicking Deny may limit the application's behavior. ...
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4answers
27k views

How to prevent a file from accessing the internet?

There are some .exe and .dll files belonging to some programs on my laptop which communicate with the internet without my permission (for self-update generally). I want to prevent those files one by ...
3
votes
1answer
499 views

Limiting network connections to specific sites when travelling / tethered (in windows)

I often find myself accessing the Internet while travelling via either (gasp) dial-up or via a very limited data plan on a cell phone. I'd like to make sure that my laptop does not use the network ...
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2answers
7k views

Block all ports except SSH/HTTP in ipchains and iptables

How can I block all ports except ssh (port 22) httpd (port 80) using iptables and iphains?
13
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7answers
139k views

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 ...
16
votes
5answers
11k views

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 ...
12
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7answers
43k views

Apache Server on Windows 7 opening up ports?

I have installed Apache 2.2.14 on Windows 7 and can view my web pages using both http://localhost and http://127.0.0.1 but when I try to access the server from another computer on the same router, it ...
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3answers
12k views

How can I restrict windows 7 to only use the local subnet, but block the internet

I want to block all internet connections to and from my windows 7 machine, but allow it to access everything on the local network. The local network is behind an Apple Airport Extreme. What is the ...
7
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4answers
1k views

Is the Windows XP firewall good enough?

I used to use a third-party firewall like ZoneAlarm and some others whose names I forget, but their complexity ended up annoying me. Assuming one runs his computer as a normal user/powersuser, is it ...
4
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9answers
3k views

Force web address to go through HTTPS

At my work, http://twitter.com is blocked, but https://twitter is not. Is there any way to have all programs/browsers access this URL using the HTTPS protocol instead of HTTP? This specifically ...
3
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1answer
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How can I use Windows Firewall to only permit the Windows Update service to make an outbound connection?

I'm trying to tailor my Windows Firewall settings (using the Windows Firewall with Advanced Security console) to only permit programs that need to access the Internet with an outbound connection to do ...
48
votes
7answers
27k views

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 ...
31
votes
5answers
19k views

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 ...
8
votes
7answers
2k views

Do I really need a firewall?

I've been using the Nod32 security suite for some time now, and out of all the others that I've tried, it's great (low memory footprint, fast, fairly cheap). However, I've been installing a lot of ...
1
vote
1answer
2k views

How to allow windows store apps and the windows strore to pass the windows firewall

I use the windows 8 firewall and I wanted it more secure, so I block incoming and outgoing connection. Unfortunately I realized that the windows store did not work as well and all application from the ...
22
votes
4answers
237k views

How can I block a program from accessing the Internet? [duplicate]

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 ...
18
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4answers
69k views

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?
16
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2answers
28k views

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 ...
14
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4answers
10k views

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 ...
8
votes
4answers
4k views

Is the firewall in the wireless router enough?

I got an ADSL internet connection that goes into a Linksys wireless router that features a built-in firewall. Are those kinds of firewalls typically good enough for regular use, or should look into ...
7
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4answers
3k views

Do I need a third party firewall for Windows 7?

I have always used third party firewalls (Zone Alarm) to avert attacks and to prevent installed softwares (like Adobe Updater) from connecting to internet. Unfortunately, when I migrated to Windows ...
3
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7answers
7k views

Is there a way to determine which service (in svchost.exe) does an outgoing connection?

I'm redoing my firewall configuration with more restrictive policies and I would like to determine the provenance (and/or destination) of some outgoing connections. I have an issue because they come ...
3
votes
4answers
4k views

Multiple web servers behind a single firewall

I have multiple web servers behind a single firewall (SVN, Exchange, etc.). I want to be able to access all of the various servers remotely, but since they are All using the same port (the standard ...
3
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2answers
1k views

How to prevent applications from modifying Windows 7 firewall policy

Basically I've set my Windows firewall the way I want it, but apparently any application can create it's own rule to completely override my settings. How can I prevent this from happening?
4
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1answer
2k views

How to append netsh firewall rules, not just replace

I am using a script to set firewall rules in netsh. netsh.exe advfirewall firewall set rule name="Block External IP's" new remoteip="$($ipArray[0])" I thought that set was used so that it would ...
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3answers
307 views

Modem -> Firewall -> Switch -> Wireless?

I'm setting up a home network for the first time. The best solution for setup that I've come up with is to have 1 wireless router serve as the firewall between the modem and switch, and another serve ...
0
votes
3answers
1k views

Connecting PS4 through SonicWall TZ100 firewall | Sony Error NW 31162-3

I am attempting to Connect my PlayStation 4 through my SonicWall TZ100. I have below Ports Forwarded. I'm not great with Packet capturing, but as far as I can tell nothing is getting bounced that is ...
3
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2answers
1k views

I can't do a Remote Assistance session to a Windows XP box from Windows 7

My Mom's computer is running Windows XP, and my desktop running Windows 7. She's having some technical issue, so I want to do a Remote Assistance session to her machine. However, no matter what I've ...
2
votes
2answers
2k views

Why my Port Forwarding rule is not working?

I'm a total noob about TCP/IP, and try to set a port forwarding rule. What I'm trying to do is this: I have multiple computers connected to my router (zyxel p-660hw-t1 v2), one of them is working ...
2
votes
1answer
74 views

Odd port 46253 activity getting through the firewall

I've been reviewing the log file for my personal router/firewall WGR614v9 and, though I have 8 active hosts on the network, I keep seeing connections to port 46253 to one of the Windows7 hosts at ...
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1answer
320 views

Setting up a web server on Windows Vista Business

What I want to do is simple. I have two PCs on a home network: One Windows Vista Business edition with IIS 7 where I develop a web site. I want to be able to access that web site from a Windows 7 ...
0
votes
1answer
95 views

firewall blocks connection even though allowed

i am unable to make any connections whatsoever to my windows 7 machine from another machine on my network. when i turn the firewall off, i am suddenly able to make these connections. one such ...
0
votes
4answers
5k views

How to programmatically allow an executable JAR file through Windows Firewall?

I have created a program in Java that uses an FTP connection to download files. It works just fine when I run it in Eclipse. However, when I export the project to an executable JAR file, the program ...
14
votes
7answers
22k views

Changing network type from Unidentified network to Private network on an OpenVPN connection

Is it possible to change the connection type in Windows 7? I have a OpenVPN connection which is identified as "unidentified network" and I do not want to apply certain rules to all unidentified ...
5
votes
3answers
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Is it recommended to run a firewall/router on a virtual machine?

Googling found me people saying running a firewall/router as a virtual machine is "dangerous" but none of them gives any reason as to why it is so. I also found posts from people who are successfully ...
6
votes
2answers
8k views

How to open file and printer shares to the internet?

i tried to make file and printer sharing open to the internet on NT3.51 in 1998, but it just refused to actually ever work. Are are the IP ports and protocols that must be port-forwarded to make file ...
8
votes
4answers
8k views

Windows tool to find out which port an app is trying to use?

I am guessing that netstat shows apps and their ports that already have a connection and it doesn't show or can't show an app that is trying to open a connection. If I have an app that's trying to ...
6
votes
3answers
367 views

Redirect ALL web traffic through TLS without a VPN

Assumptions: Server: I have a Debian Squeeze server, routable on the public Internet, with a static IPv4 address. I have unrestricted access to modify the software on the server. The server can ...
4
votes
4answers
4k views

how to ssh two computers behind NAT and Firewall, without third computer

I am trying to ssh into my Linux box at home. My home is a dorm-style environment - NAT and Firewall with personal laptop running Arch Linux. My work is corporate style Windows 7 - NAT and proxy ...
3
votes
3answers
5k views

How to SSH an outside server from a computer which is behind a proxy firewall?

I access the Internet through an HTTP proxy firewall at college. And I need to login to a computer, via SSH, which is outside our network. I tried it as Linux command and on Windows using PuTTY. I ...
1
vote
1answer
533 views

What is the simplest way to use svn repository through firewall without compromizing the security?

I have a multiple Win xp/7 PCs in a network that have no Internet access. All traffic is routed through a firewall PC (latest ubuntu LTS, without admin). This firewall has limited ports open to ...
8
votes
4answers
11k views

How do I block all outgoing ports in Windows XP firewall?

The built-in Windows firewall seems to only block incoming ports, but not any outgoing traffic. I am looking for an application to install on an xp machine which can be configured a way to block ...
6
votes
6answers
2k views

Is it safe to put a Mac directly on the internet?

In the past I have always run a NAT router between my Windows PC's and the internet. I'm wondering if I still need this or whether the OSX firewall is good enough to let me put a Mac directly on the ...
5
votes
7answers
14k views

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 on listening state..
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2answers
422 views

Weird hits on port 2703

I'm getting these periodical console messages on my Mac: 7/22/11 8:01:03.925 AM Firewall: Stealth Mode connection attempt to UDP 10.0.0.1:2703 from 91.143.232.133:15881 7/22/11 8:01:05.885 AM ...
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votes
3answers
1k views

I need to block torrent downloads

My cousin complains that his housemate uses torrent and thus it causes slow connection to my cousin. He owns the ADSL modem and I saw some good futures such as blocking websites or protocols. Like if ...
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1answer
198 views

Can Windows based computers ever be secured? [closed]

In light on this excellent article series by Ars regarding the black security work by HBGary - HBGary claims to have coded several rootkits and had access to 0-day exploits that could compromise a ...
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1answer
2k views

How to get rid of annoying and quickly disappearing firewall popups on Mac [duplicate]

Possible Duplicate: Why does the Mac OS X firewall dialog recurringly pop-up and disappear by itself (without letting me respond) under Snow Leopard? Hi, Often when I have smb file shares ...