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

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2answers
476 views

Why after Accepting Ports 20 and 21 in iptables are they still closed?

I am trying to open the FTP Ports on my server. I have vsftpd installed on the server already. However I am unable to reach the server on ports 20 and 21 Somehow it is allowing me to access port 21 ...
2
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2answers
1k views

Wifi router blocks wireless peers from connecting each other

What option controls that wifi router blocks wifi peers from connecting each other. I have wifi router Dlink Dir-320. With that router I can't ping (or connect via FTP or HTTP) one laptop from ...
2
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1answer
2k views

netsh, block all IP addresses in a text file?

Is there a way for me to import a .txt file (with IP addresses on each line) into Windows Firewall? I want each of the IP addresses to be completely blocked. That would also provide an easy way to ...
2
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2answers
83 views

Logitech Support telling us we have an unsecure network and trying to charge $99?

My boss is trying to set up a Logitech Webcam on his computer in the office and he called Logitech support, and they were trying to fix it and could not so he let him on his computer he said he could ...
2
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1answer
8k 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 ...
2
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2answers
2k views

What port(s) etc. need to be open on a firewall to allow successful operation with BitBucket

Over the weekend, our IT department installed an updated firewall. As a result, we are no longer able to pull from (and push to) the repository on BitBucket. Attempting to perform a Mercurial ...
2
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2answers
105 views

Hitting try agin button again and again in firefox breaks the firewall?

The IT department of our company have blocked FB. but if we keep on hitting try again button again and again after 6-7 attempts it opens. Why is this so?
2
votes
1answer
703 views

Use Shorewall to port-forward requests based on the domain requested to different servers

How can I get my firewall to port forward traffic that is comming into different domain to different servers. So I have two web servers. Each one hosts different domains on different servers/IP: ...
2
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5answers
672 views

Easiest way to restrict IP access per user on ubuntu

I installed Ubuntu 10.10 on an old laptop for my daughter and want to be able to restrict which web sites she can access. I would like to have a white list of addresses she can access. Can anyone ...
2
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2answers
407 views

Can the Snow Leopard firewall remember my choices?

I have the Snow Leopard firewall switched on. Every now and then, it asks if I'd like to allow or deny network connections for an app. I make a choice, and every time I open the app it asks me again. ...
2
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3answers
178 views

How to remove a virus that trigger the internet explorer every some minutes?

Some days ago, I got a file in Windows Live Messenger by an account of my friend, I thought it was a normal file because he normally sent me some files as well. But this time, I had no luck, he got ...
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3answers
8k views

How do I find out if I am behind a firewall?

OK, so I live in an apartment that offers me internet, but I have no idea through who, or what type. It is pretty dang fast, thats all I know. I have all of my computers running through my router, ...
2
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1answer
3k views

Can't seem to allow incoming connections on a specific port, Mac OS X 10.6.1

I want to be able to allow incoming connections on a specific port regardless of the program currently running. This is mainly so I can temporarily let users from other machines access ruby on ...
2
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2answers
2k 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
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2answers
5k views

How to access NodeJS server on LAN?

I'm not the most knowledgeable guy ever with networking, but here goes... I've created an application with NodeJS and I'd like to test the application on my LAN with my family. The application ...
2
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3answers
309 views

A tool which can in single click block all apps from using internet?

I will bring my laptop to my vacations and connect to the net via my mobile phone. the mobile transfer limit is limited to 200MB and I do not want to deplete it in one day. I basically want that I ...
2
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4answers
10k views

iptables: Allow only HTTP access for web browsing

Have a linux box, want it locked down but just be able to surf internet on it. Why is this script blocking http too? #!/bin/sh # # iptables -F # #Set default policies for INPUT, FORWARD and OUTPUT ...
2
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1answer
10k views

OSX Lion, open a local port so people on my network can access it

I'm running django's simple HTTP server (using python manage.py runserver). It's currently running on port 8000. How can I open a port on my macbook and allow network traffic to visit my host on ...
2
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1answer
7k views

Windows 7 firewall causing remote connection to time out; should refuse connection

The Windows 7 Firewall is running with default options to allow outbound connections and block incoming connections. I have a process trying to connect regularly from within my local network, which is ...
2
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1answer
205 views

How to I allow outside access to port 8080?

I'm trying to add a rule to my router to allow outside access of a web app running on one of my computers on port 8080. When creating a rule, my router (actionTec) asks for three fields: "Port ...
2
votes
1answer
364 views

Is my Windows Firewall active?

I'm trying to set a simple public block for an application for both inbound and outbound connections. I'm using Windows 7, but my friend is still able to connect to the application. Steps I took are ...
2
votes
3answers
114 views

Detect URL connection attempt by desktop application

A user is using Autodesk Project Vasari 2, which provides training videos. The videos are blocked by the corporate firewall. Is there a method I can use to find out what URLs the application is ...
2
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3answers
163 views

Granular control of the flow of data into and out of all devices on a home network to an ISP enforcing bandwidth limits

Internet service providers are gradually chipping away at net neutrality and imposing bandwidth limits. Most users will need to trust their ISP to report accurate bandwidth consumption rates, and ...
2
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1answer
4k views

Open firewall port on Fedora 14

I want to open the port 18680 on my remote Fedora 14 machine. I did sudo iptables -I INPUT -p tcp --dport 18680 -m state --state NEW,ESTABLISHED -j ACCEPT sudo iptables -I OUTPUT -p tcp --sport ...
2
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1answer
486 views

Firewall for controlling network traffic

I'm wondering if it is possible to have a firewall on Windows 7 that can only allow network traffic to one IP address, and from that one IP address? I'm using a VPN that tunnels all my internet ...
2
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1answer
94 views

stop windows 7 complaining about the firewall

Is there a way to stop Windows 7 complaining about the fact that ive turned the default firewall off. Whilst i am on my home network i dont want to run the windows firewall as im behind a router, but ...
2
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3answers
1k views

Firewall to block traffic to specific websites

I have recently switched from MAC to Windows Vista. I used to have LittleSnitch on Mac where I can create filters and disable browsing to other websites. I mean, I can create filters so that ...
2
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2answers
659 views

FTP not accessible outside of LAN

Ok so I really need some help with this, I have XAMPP installed and am hosting a webiste with it for my friends and i to work on. I am able to see the site just fine and also i am able to get to ...
2
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1answer
61 views

Does Windows Firewall have a log?

I am trying to set my router to forward three of my ports for EchoLink. But I'm having trouble with it. I'm Using the PFPortChecker to see if the ports are open, it says they aren't, but to check my ...
2
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1answer
126 views

Unable to access internet from Windows Command Processor

I am unable to access internet from the Windows Command Processor. Below is the output on doing a simple ping: C:\Users\vivekkumar>ping www.stackexchange.com Pinging www.stackexchange.com ...
2
votes
2answers
176 views

Keeping a slowish DSL connection responsive

I have a Linux box serving as a firewall/router for our home network. I live out in the boonies, so I have a relatively slow broadband connection: Downstream Rate 7616 Kbps Upstream Rate 512 ...
2
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1answer
615 views

Duplicate rule in windows firewall

Let's say you have two rules, one that block and the other that allows the connection from the exact same IP. Which rule takes precedence? Here is some context: I created a script that will block any ...
2
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1answer
556 views

Although my firewall is off, I cannot connect so some ports on my mac (Mountain Lion)

I have a mac-mini (Fall 2009) with OS X 10.8.4 on my local network and I am running a simple http server on port 5000 (or any other port). I have turned the firewall OFF. I can connect to the mac via ...
2
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1answer
2k views

how can I allow outgoing access to a port in firewall

Im doing a file_get_contents but getting Connection refused I used the following to allow outgoing connections from server2 to server1, and vice-versa. But I'm still getting failed to open stream: ...
2
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1answer
3k 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) ...
2
votes
3answers
1k views

How can I get rid of the long Google results URLs? [closed]

google.com is always shielded by our firewall. When I search something at google.com, a result list appears. Then I click the link, the URL changes to a processed url like: ...
2
votes
1answer
654 views

Manually allow ping.exe through firewall

To improve my feeling of security I recently switched my windows 7 firewall to block all outbound connections. The only thing I can't seem to get to work is ping.exe. I tried by creating custom rules ...
2
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1answer
2k views

Block IPv6 Traffic using iptables on Linux using Layer 2 info

I have setup a simple isolated network consist of following Linux based machines: Node1<---->Router<---->Node2 Router's eth0 is connected with Node1's eth0. Router's eth1 is connected with ...
2
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2answers
65 views

Certain banking pages not loading

For some unknown reason, I am suddenly unable to access my accounts at several banking and credit sites. I have been a registered user at each site for several years and know I am using the correct ...
2
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2answers
704 views

Home Network, VPN & Security

At the moment, my home network is comprised of 5 computers (3 laptops and 2 desktops), one of which is running Windows Server 2008 and works as a home repository for some of our files. We access the ...
2
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1answer
1k views

Kaspersky 2012 Firewall - prompt on new connection attempts

How can I get Kaspersky 2012 Firewall to ask me everytime if I want to allow or deny an application to connect to the internet the first time it asks and have it remember that until the application ...
2
votes
2answers
752 views

Wake On LAN on request

I have a small home network with the router capable of running OpenWRT, is there some utility or firewall rule, which can be used to Wake On LAN on request. What I think - if I want to access my media ...
2
votes
1answer
6k views

What router settings are required for Windows 7 Remote Assistance?

I want to connect to someone's PC using Remote Assistance in Microsoft Messenger. Both PCs run Windows 7. The remote user is the one initiating the request. We're both behind firewalls/routers ...
2
votes
2answers
416 views

Tracing what program is making a network connnection? (CentOS)

I was wondering if it is possible to find out which process is trying to make a specific network connection. On a server I support which hosts websites for about 200 users, the iptables firewall keeps ...
2
votes
1answer
1k views

How to block access to a website on Lucid Lynx?

I am trying to block a few websites on a lucid lynx, I tried editing /etc/hosts and that blocks access via url but the site still open if I enter the ip on the browser, how can I block ip access also? ...
2
votes
6answers
136 views

Software and hardware firewalls

I'm connecting to the internet through a router at the moment, a Linksys WRT54G, do I need to have a software firewall set up? It seems kind of redundant if you're never going to directly connect to ...
2
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3answers
3k views

Is there any Linux firewall like ZoneAlarm, Keiro or Comodo in Windows environment? [closed]

Is there any Linux firewall like ZoneAlarm, Keiro or Comodo in Windows environment? I like to to able to monitor and block any Linux program from making in/out TCP/UDP connections on per application ...
2
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2answers
4k views

Is it possible to put UFW on CentOS?

If so, how would I do it? If not, is there an easier way to set some basic rules on CentOS other than iptables? I'm more of an app developer and less of a sys admin.
2
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1answer
3k views

How to automate Checkpoint firewalls rules implementation?

I HATE CP with a passion beyond belief... I mean, why, WHY you couldn't include a command line interface that allows me to grep a CSV file in which I'm requested rules, format them properly and then ...
2
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2answers
2k views

Filezilla connection - port blocked?

Since this morning I am unable to make a update with many files (i try to update the piwikinstallation, requires me to upload about 24mb). After a while, filezilla gets the answer from server, that ...