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

learn more… | top users | synonyms

2
votes
1answer
748 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
votes
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
votes
1answer
4k 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
2k 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
775 views

Manually allow ping.exe through the Windows 7 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 ...
2
votes
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
votes
1answer
718 views

OS X stealth mode: where is it enacted?

I am working through the security guide from apple (which they did not update since Snow Leopard). In the firewall section it states that ipfw has a default allow rule: 65535 allow ip from any to any ...
2
votes
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
votes
2answers
733 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
votes
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
772 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
444 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
138 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
votes
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
votes
2answers
42 views

Bridging Firewall to Public Wifi

My building offers wifi to its residents. It is not managed by IT professionals. I would like to use this internet source some of the time, but would like to be protected from machines on that ...
2
votes
1answer
4k 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
votes
2answers
3k 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 ...
2
votes
1answer
185 views

SSH tunnel and firewalls

Can a firewall still block things off a tunnel going trough it ? I am testing my proxy with Dante in China and works flawlessly but I have the same config on a proxy in Ireland that goes trough a ...
2
votes
1answer
60 views

All IP traffic gets dropped after a while

I'm on a Windows Server 2003 machine, and after some light to moderate network use, the server occasionally drops all IP traffic. It takes a while to get into this state, and there's nothing obvious ...
2
votes
2answers
3k 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
241 views

Is there a HTTP proxy server that uses another proxy for certain sites (in black list) and access directly otherwise?

Some websites are blocked in my network, so I have to use a proxy outside my local network to access them. In order to maximize the speed, only blocked sites be accessed through proxy. Currently, my ...
2
votes
1answer
2k views

Work firewall blocking Gmail IMAP port

My work has a very over protective firewall. We use Google Apps for our email and so can access the web interface just fine. I use my laptop at work however (MacBook connected via WiFi through my ...
2
votes
1answer
1k views

PureFTPd is using ports above 50000 even with PassivePortRange specified

I have installed the pure-ftpd package with PureFTP 1.0.24 on Ubuntu 10.04 using apt-get. Even though, this is the default port range, I've added the file /etc/pure-ftpd/conf/PassivePortRange ...
2
votes
1answer
3k views

How can I permanently allow a firewall rule in OS X Mountain Lion?

Since upgrading to OS X Mountain Lion, every time I restart my computer I am alerted Do you want the application "Growl.app" to accept incoming network connections? Even though I click ...
2
votes
1answer
329 views

Accessing a site using websocket behind University gateway

I'm trying to access lichess.org from the university network. I can access the site but when I try to join/launch a game, I keep getting reconnecting message. I emailed the admin and he told me they ...
2
votes
1answer
2k views

Blocked outgoing SMTP socket connection in Windows

I have a private email sending application (Windows), which sends email notifications over SMTP protocol. This might look like a code question for StackOverflow, but it is not. The application works ...
2
votes
1answer
436 views

Accessing my Rails webrick behind proxy?

In my mackbook, when I try to connect to my rails application in office I can't , in the office there are some http proxy , and when I run my rails like this : sudo rails s -p8080 => Booting ...
2
votes
3answers
1k views

How to firewall a VPN connection in Windows 7?

I have a VPN connection to a private VPN server in another country. I don't want any internet packets to leave or enter my laptop unless they are going to or coming from the VPN server's IP. Is ...
2
votes
1answer
585 views

Remove Windows Firewall requirement for adding printers

Is there a way to remove the requirement Windows 7 has to have the firewall enabled to add a shared printer to the computer?
2
votes
3answers
3k views

SQL Server Ports

The Microsoft website states The firewall must be configured to permit port 1433 incoming (or the port numbers that SQL Server listens to on TCP/IP), and ports 1024 to 65535 outgoing. Does this ...
2
votes
2answers
2k views

OpenVPN on a campus network?

I have my router at home running Tomato USB with OpenVPN running on port 1194. The campus network only has port 80 publicly open and I'm almost positive that they do traffic shaping and content ...
2
votes
2answers
1k views

Windows 7 Port forwarding remote desktop issue

I have been banging my head against the wall for a long time now trying to get remote desktop working on my Win 7 machine. Here are the things I have tried: I have verified using ...
2
votes
3answers
6k views

iTunes Home Sharing only works one way between 2 Windows XP PC's on the same LAN

Both PC's have the latest iTunes installed. PC (A) can "see" that there is a shared library "B library" but attempts to connect to it return this error message: The shared library "{Username}'s ...
2
votes
1answer
713 views

What ports in firewall need to be open for allowing Mac Vine Server connection

I have a Mac with Vine server installed sitting inside the firewall (actually a router connect to cable model, and has a LAN to internal). What if I want to remote desktop to Vine server from ...
2
votes
1answer
799 views

Why would http & https be blocked, even in safe mode with firewall disabled?

I have a windows 7 machine (dell studio xps). Everything on it seems to be in working order. The network device says it has internet connectivity, and indeed I can ping websites, transfer files via ...
2
votes
2answers
2k views

Connecting together DIR-615 and DIR-655

On my DIR-655 my internal network is: 192.168.0.x On my DIR-615 my internal network is: 192.168.1.x They are both connected to my firewall PIX 501 box The PIX itself is connected to the comcast modem. ...
2
votes
4answers
2k views

How can I scan from Canon PIXMA MX700 without disabling OS X firewall?

I have a Canon PIXMA MX700 connected by ethernet. When I first bought it I was using OS X 10.4, and scanner-initiated scanning worked fine. After upgrading to 10.6, neither scanner-initiated or ...
2
votes
4answers
6k views

UFW as an active service on Ubuntu

Every time I restart my computer, and check the status of the UFW firewall (sudo ufw status), it is disabled, even if I then enable and restart it. I tried putting sudo ufw enable as one of the ...
2
votes
1answer
31 views

How to block website from MAC in the verizon router firewall settings

I've tried searching for how to configure my verizon router firewall to block certain websites but nothing seems to be working. Picture of what I've done here I did an nslookup for youtube.com and ...
2
votes
1answer
48 views

A secure, iptables rule-set for Ubuntu home router

I am using a Ubuntu 14.04 server machine as my primary home router and firewall. It has DNS, DHCP and uses iptables to secure everything up. Iptables also acts as a nat. On eth0 I have my incoming ...
2
votes
0answers
88 views

Can I set up Windows 7 VPN so that only sites blocked in China are routed through VPN?

I'm in China behind the Great Firewall using a VPN service provided by a friend so didn't get blocked in the VPN crackdown in January 2015. Since VPN can slow down traffic a lot I'd like to only ...
2
votes
1answer
49 views

How does my computer's firewall work? Like inbound rule, outbound rule, reply?

So I understand how NAT works, but I don't understand how firewall works. With non-symmetric NAT, if someone sends me a packet, it gets blocked, but it I send someone a packet and they get that packet ...
2
votes
1answer
72 views

SSH Server Not Responding To Connection Request

I'm attempting to set up an SSH server on my local machine using OpenSSH. When I try to SSH from a remote host into my local SSH server, the SSH server doesn't respond and the request times out. I'm ...
2
votes
0answers
41 views

Configure firewalld to distinguish home and public ethernet connection

I connect my notebook via ethernet at home and outside. I want to open some ports for services like samba only at home and not somewhere else. How can i let firewalld automatically detect where i am, ...
2
votes
0answers
43 views

IP adress for debian.org and debian.net

we are enforcing a strict firewall policy at my firm and are whitelisting adresses on the internet. My issue is this : I need to get a list of IPs (or at least a subnet) for standard debian update ...
2
votes
0answers
76 views

Why is the Windows firewall not blocking outbound ports?

I use the following rule to block all outbound communications to remote 80 ports. I want to use this approach to prevent web requests initiated from this computer. But it seems I still can access web ...
2
votes
0answers
67 views

How to make my local tomcat server accessible to www?

So I have my "Hello World" Java project, using Intellij Idea, tomcat 7 is running. OS Windows 7. When I go to http://localhost:8080/ from my PC, it works fine. Now, I want the world to see my ...
2
votes
1answer
223 views

No incoming connections allowed to Windows 7 Embedded

The PC with which I have network troubles has Windows 7 Embedded (WES). From this PC it's possible to connect to other machines and devices through different ports, but this machine doesn't allow ...