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

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6
votes
1answer
3k views

How to easily determine, which outbound ports aren't blocked by firewall

I'm behind fairly restrictive firewall regarding ports, that can be used for connecting outside. I'm also running service on my remote box, and I want to connect to it. Problem is, that I'm unable to ...
6
votes
3answers
5k views

How can one restrict network activity to only the VPN on a Mac and prevent unsecured internet activity?

I'm using Mac OS and connect to a VPN to hide my location and IP (I have the 'send all traffic over VPN connection' box checked in teh Network system pref), I wish to remain anonymous and do not wish ...
6
votes
1answer
8k views

Completely disable internet connection except for browser and bittorrent

I need a simple software that ideally needs minimal configuration that will completely block all incoming and outgoing internet connections on my computer, with the exception of a browser (Firefox) ...
6
votes
3answers
19k views

How to use OpenVPN through a restrictive firewall?

I'm currently in the situation of attempting to setup OpenVPN on a personal VPS, for connection primarily through an overly restrictive firewall. All of the setups mentioned below work when used ...
6
votes
2answers
4k views

VPN/Tunneling (SSH or otherwise) on Windows via HTTP proxy

Situation. ... +-- Computers (to the internet) | | - [ router / firewall ] -- [ switch ] +- [ switch ] -+-- ...
6
votes
2answers
2k views

How can I set up a webserver behind two routers?

I realise that this may be better suited to ServerFault, but this is my home network that I run in a non-professional enviroment. At home I have my main router connected to the internet which the ...
6
votes
2answers
289 views

Open up firewall automatically to anybody who has successfully connected via SSH

I have a server which runs a few services. However, for security reasons, I configured the server so that nothing, except for SSH, is accessible from outside. What I'd like to do instead, though, is ...
6
votes
1answer
371 views

How to configure Windows Firewall to allow all ports in use by IIS Express

My understanding of this technet article, per the page that brought me there*, is that I can configure the Windows Firewall to allow all inbound traffic on any port being used by a specified ...
5
votes
4answers
6k 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 ...
5
votes
2answers
10k views

Stopping PING requests on my home router

I can imagine that somehow not responding to PINGs from WAN would be an ok idea regarding home network security. But can there be any down-sides to this? I imagine games implement their own PINGs, so ...
5
votes
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 ...
5
votes
7answers
507 views

Is there a way to stop websites on an Apache localhost web development server from accessing the Internet?

I am using Uniserver for PHP web development and I am running windows 8.1 and have Kaspersky installed on system. Most of my work involves working on WordPress websites. Wordpress core files and ...
5
votes
4answers
10k 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 ...
5
votes
2answers
9k views

Deny all incoming connections with iptables?

I want to make some simple iptables rules to deny all incoming connections and allow outgoing. How can I do that?
5
votes
8answers
2k views

Outgrowing Linksys WRT54G router

Looks like the WRT54G is no longer adequate for our needs. At first with only a 2-3 people on the router it was ok, but now with more people and devices it's just no longer reliable. Crashes almost ...
5
votes
3answers
916 views

How do I block a host by ASN? Example - AS16276

There are a handful of especially toxic hosts out there. There is no reason we need to allow any of their IP's access to our servers. Is there a way we can block them using their ASN or other global ...
5
votes
2answers
228 views

What alternatives exist for Zone Alarm?

I like having Zone Alarm to warn me when programs are trying to phone home / request for updates etc. However, I feel its interface is a little clunky and was wondering if there are any alternatives ...
5
votes
2answers
5k views

what does “-m tcp” mean in this iptables rule?

Firewall configuration written by system-config-firewall -A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
5
votes
2answers
7k views

If I use a proxy server, can my computer bypass the ISP?

If somebody is using some kind of proxy server to connect to the internet, does their computer connects to the ISP first and then to the proxy server, or does it connect to the proxy server first and ...
5
votes
4answers
5k views

Tools to monitor hack attempts/port sniffing

What tools are available that allow me to monitor if someone is using a port sniffer on my computer and/or display any possible hacking attempts? I'm using OneCare, but the firewall information is ...
5
votes
2answers
2k 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?
5
votes
8answers
16k views

Internet connection under Windows Vista stops working until reboot [closed]

I have a fairly clean Vista Home Premium SP1 install on my desktop. There aren't many applications installed. My Internet connection always seems to stop working after web surfing for a while - ...
5
votes
3answers
1k views

How can I get my routers to forward ports correctly?

My network currently looks like this (simplified): Note that Router #2 is connected to the LAN interface of Router #1. This should be familiar to anyone who has seen a standard static-IP setup ...
5
votes
1answer
338 views

Program to block an IP temporarily with iptables

Is there a program on Debian to block an IP address temporarily just by launching a command (specifying the IP and the duration)? With iptables/ip6tables alone I can create a rule, but I would then ...
5
votes
1answer
548 views

Rackspace Firewall/Gateway Setup

I have rackspace account and wish to have this sort of setup: Firewall/Gateway eth0 - Public IP (56.X.X.X) eth1 - Private IP (10.X.X.X) Ubuntu 10.10. Accepts connections from the internet and ...
5
votes
2answers
1k views

Cookies blocked by router?

My friend has a D-Link DI-524 router that she uses for her home broadband. It's a pretty vanilla setup with the standard firewall settings, DHCP enabled etc. However, recently she has experienced ...
5
votes
1answer
324 views

How to see which applications use “Host process for windows services” to eat metered data?

I have to spend a lot of time on metered connections in a country where data is expensive. I use Glasswire firewall to keep an eye on what software is using my precious data and to throttle programs ...
5
votes
1answer
2k views

Remote Desktop access Windows 7 system from Windows 8

I have 2 windows systems... Windows 7 (192.168.2.8) Windows 8 (192.168.2.9) Both are connected to WiFi router. They have been assigned address 192.168.2.8 & 192.168.2.9 respectively. I have ...
5
votes
2answers
2k views

Connect and use to multiple networks in Windows 7?

The core of this questions I suppose is "How to I tell Windows 7 which interface to use for each network?" My current set up is: 1) 10/100 cable connected to my corporate network, which is behind a ...
5
votes
1answer
675 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 ...
5
votes
2answers
592 views

Issue with China's Great Firewall (or other odd networking issue)

We periodically deploy an application to a computer located in China (from Canada). We deploy the changes using Subversion - we're talking a ~100Mb diff. We've noticed that the speeds are good until ...
4
votes
2answers
6k views

Deny access to a port from localhost on OSX

I want to test a fallback strategy for my memcached driver (in case port is protected by firewall). How can I deny access to a specific port, on 127.0.0.1?
4
votes
3answers
4k views

SSH connection between two behind-nat computers through third public-ip computer

I have a computer at home (home-server) that runs irssi, rtorrent etc. My ISP is blocking every traffic from outside (dumb, I know, but it's the only ISP I can have). I want to be able to log in into ...
4
votes
1answer
39k views

How can I configure my firewall to block Abobe Illustrator CC 2014 updates on Windows 7?

I have a very simple question. How can I configure my firewall to block Adobe Illustrator CC 2014 updates on Windows 7?
4
votes
6answers
811 views

Standalone firewall + antivirus or combined security tools?

For years I'm using some antivirus software and different firewall. Now every antiviruses have got some firewall features and there are complete "internet security" complexes... and every firewall get ...
4
votes
7answers
219 views

Corporate site filter

Alright so my work blocks a bunch of websites for obvious reasons. They even blacklisted logmein.com so thats out. I feel that I am capable of getting all my work done AND keeping up with my warfish ...
4
votes
3answers
1k views

What are the most common dangerous domains that I should block?

I am trying to configure my wireless router to block domains that are potentially dangerous to privacy, security, and bandwidth-hogs. Is there a list of domains that I can block at the router level? ...
4
votes
1answer
14k views

How can I disable any TCP/IP port on a Windows 7 machine?

I need help on finding out how to disable any particular TCP/IP port on a Windows box whenever a need arises. I googled before posting the question and I got links to articles mentioning only ...
4
votes
2answers
133 views

Is hardware firewall useful?

I found out that my PC was attacked, which took almost 99% of my upload internet resource for unknown usage for more than two months. I formatted my PC; update windows and internet security. It should ...
4
votes
5answers
33k views

Windows Firewall is blocking Windows Update

I recently uninstalled ZoneAlarm and have decided to use Windows Firewall as my firewall as ZoneAlarm was causing me grief when I was syncing my iphone. Anyway, I've noticed just then that Windows ...
4
votes
3answers
7k 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 ...
4
votes
3answers
148 views

Is there specialized software for testing the security of a computer?

I'm trying to secure my computer against local network attacks for when I'm at university or a LAN party. Although my dad's computer store is also running a Windows Server so it might be handy to ...
4
votes
1answer
3k views

How to show the firewall log on a mac (Mountain Lion)?

Where do I find firewall log on mountain lion 10.8.2? I have a problem with refused connections and I want to see if the firewall prevents me from connecting.
4
votes
1answer
1k views

How can I check what outbound ports are allowed in a network?

On some networks (primarily corporate ones), the firewall restricts outbound connections to some port number. The allowed ports generally comprise of port 80, 11, 443, etc. Is there a way I could do ...
4
votes
7answers
16k views

Can't block a specific application in Windows 7 Firewall

I am using Windows 7 64 bit and trying to block a specific application from accessing the internet using "Windows Firewall with Advanced Security" (wf.msc). The rule is set to be applied for all ...
4
votes
2answers
595 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 ...
4
votes
2answers
3k views

Local port forwarding on a mac

I need to have the mac take traffic coming into it on one port send the traffic to a different but still local port. I.e. Traffic comes in on port 1234 and transfers to port 5900 (vnc) This is ...
4
votes
3answers
198 views

Is there a respected AntiVirus and software firewall app that doesn't invade your privacy?

I recently purchased ESET's AV and firewall software suite. I know it to be a respected app but when reading the license while installing they made it clear that they will collect not only information ...
4
votes
2answers
2k views

What is the best way to restrict network access for one machine on a home LAN?

As an example, I have 3 computers on a home network: Machine A Machine B Machine C What I would like to do is isolate "Machine C", so that it cannot communicate with "A" or "B" and vice versa. It ...
4
votes
1answer
3k 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 ...