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

learn more… | top users | synonyms

1
vote
1answer
635 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 ...
1
vote
2answers
12k views

Enable ping in Windows 7 firewall?

Server Fault tells that the new syntax to enable ping on Windows Server 2008 is netsh advfirewall firewall add rule name="ICMP Allow incoming V4 echo request" protocol=icmpv4:8,any dir=in ...
0
votes
1answer
3k views

Connecting to SSH from behind an HTTP proxy

I'm behind a corporate network with an HTTP proxy. I also have an SSH server to reach on port 22. I don't have any kind of control over that server: I'm not root and even if I were I'm not allowed to ...
9
votes
8answers
24k 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..
7
votes
3answers
3k views

Mac firewall blocking nginx (port 80) from external side

I installed nginx using ports and started it with sudo. Accessing the nginx welcome page from localhost works perfectly, however accessing it from an external computer fails. Doing an nmap on the ...
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 ...
3
votes
2answers
504 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 ...
2
votes
1answer
1k views

Window 8 machine cannot ping devices on same subnet

After returning from vacation during which several Windows updates were applied and my router suffered a hard power cycle, my Windows 8 Desktop can no longer ping other devices on the same subnet. ...
2
votes
3answers
2k 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 ...
1
vote
1answer
200 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 ...
1
vote
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 ...
0
votes
1answer
231 views

Lync keeps dropping because of D-Link DIR-601 router. How to configure firewall to fix this?

I saw this article, and it's exactly my problem, but my settings are a bit different and nothing seems to have fixed it so far. Why does my D-Link Router keeps dropping my Outlook and Lync ...
0
votes
1answer
1k views

Block all network traffic from/to laptop except explicit apps/protocols/targets?

Usually I connect my WinXP laptop via WiFi to my home LAN, but sometimes I have to use tethering with cellular phone where traffic prices are very high ($1 = 2 MB traffic counted in both directions). ...
8
votes
4answers
3k views

If I use an SSH tunnel to get around a firewall, what does the sysadmin see?

I use an SSH tunnel for the port my browser uses to access the internet. The result is I get around the firewall my network uses, which prevents me from using many sites I want to use (facebook, ...
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 ...
4
votes
5answers
8k views

Bridge between Wired and Wireless networks for a single device?

EDIT 18/05/2011: Thanks for your answers, bridge mode IS the solution in most cases for this problem, but I can't use it because it breaks my web server. I am now looking at setting up a specific ...
4
votes
6answers
803 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 ...
2
votes
0answers
118 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
2answers
449 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 ...
1
vote
1answer
525 views

Redirect traffic through port 80

My situation is as follow : I have a client on a network where only port 80 is open. I'd like to be able to connect to a FTP (port 20 - 21) from this client. Is there any way to redirect ...
1
vote
2answers
762 views

How to enable Remote Assistance and add an exception for it in Windows Firewall from the command line?

I need to enable Remote Assistance from the command line. The equivalent of checking this box and hitting Apply. This is for automation and I tried editing the registry entry ...
1
vote
2answers
916 views

Running a webserver behind a firewall I have no access to

I'm having a bad time in my student appartment: I want to run a webserver on my Laptop, which should be reachable from outside of the net. I'm sitting behind some proxy-server that passes outgoing ...
1
vote
2answers
1k views

Is there a way to sync/mirror website file and database between two remote servers?

Here's my situation, I have website "A" sitting behind a intranet firewall, inaccessible to the people outside the intranet. I intend to have a outsourced developer work on "A", but he's not able to ...
1
vote
1answer
1k views

Why can't we turn off firewall And file sharing?

I was under the impression that turning off file sharing "makes it more secure". Especially when I like to have my firewall switched off, turning off file sharing becomes more important to me. But ...
1
vote
3answers
371 views

Looking for a new, free firewall (Sunbelt has a huge hole)

I've been using Sunbelt Personal Firewall v. 4.5 (previously Kerio). I've discovered that blocking Firefox connections in the configuration doesn't stop EXISTING Firefox connections. (See my post ...
1
vote
2answers
39k views

How can Windows XP's firewall be made to block a specific application?

I haven't used Windows XP in a while, and as it looks, its built-in firewall. When turned on it should be blocking every application, while letting you add exceptions to let some through. However, ...
0
votes
0answers
32 views

How To Configure Portforwarding with iptables

I have got a "Hypervisor" witch has two interfaces: eth0 Link encap:Ethernet Hardware Adresse d4:3d:7e:fc:b2:db inet Adresse:87.25.34.251 Bcast:87.25.34.255 Maske:255.255.255.192 ...
0
votes
1answer
542 views

How do I stop my Mac from asking to accept incoming network connections?

I am using Syncthing, which is an application to sync files between two or more computers. I believe Syncthing (on github) needs to be allowed to Accept incoming network connections to work properly. ...
0
votes
2answers
82 views

Firewalling VirtualBox: restrict host inbound connections to guests only

I have Windows7 + Cygwin and VirtualBox. I would open a listening port on the host accepting only inbound connections from the VMs. Note: In many case the server services running on the host can be ...
0
votes
1answer
210 views

Block a Subdomain in Windows Firewall

Gamespy is ceasing its Master Server support for many games at the end of May, including Crysis 1, Wars, and 2. I have worked with Crysis 1 and Crysis Wars for a very long time, and now the entire ...
0
votes
1answer
294 views

what ports to open up for GitHub to install and work?

I want to use GitHub on a server where user accounts are not supposed to be able to go online otherwise. The GitHub Windows app does not even install without users' downloading it themselves (see my ...
0
votes
1answer
61 views

unable to start apache after changes to rc.conf and resov.conf

I had a working configuration this morning with the following simple /etc/rc.conf ifconfig_rl0="DHCP" ifconfig_xl="inet 192.168.1.11 netmask 255.255.255." defaultrouter="192.168.1.1" I added the ...
0
votes
1answer
412 views

Vista Windows Firewall - how to block all ports apart from 1 on a particular subnet?

This is fairly easy in Win7 because that version of Windows Firewall allows you to block a port range e.g. 1-79,81-65535, leaving only a single port open. However Vista (at least by default) doesn't ...
0
votes
1answer
4k views

Windows firewall blocks outbound connection that is allowed by a rule

I have configured Windows Firewall to block all outbound connections. I have then created "allow" rules to enable certains applications to create outbound connections. Unfortunately it seems that some ...
0
votes
2answers
944 views

Open a port safely in firewall for a PC connected to Internet

This is related to this question PCs in same network can not communicate My real problem was that I have a web application I want to test running in PC1 but I noticed I could not even ping the ...
0
votes
3answers
676 views

Stealth Ports even while communicating?

I was using a port probing site/program called ShieldsUp! to scan my ports. It reported back that all of my ports were "stealth", and in their words Your system has achieved a perfect "TruStealth" ...