Questions tagged [firewall]

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

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6 answers
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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 ...
Ivo Flipse's user avatar
  • 24.8k
42 votes
2 answers
181k 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 ...
thegreatdane23's user avatar
68 votes
3 answers
643k 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 ...
SilverLight's user avatar
  • 1,374
44 votes
4 answers
39k 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 ...
olafure's user avatar
  • 945
19 votes
7 answers
19k 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....
cust0s's user avatar
  • 1,121
26 votes
12 answers
124k views

How to block everything (all incoming and outgoing internet access) except those applications are in firewall white-list?

Is it possible to auto block all applications incoming/outgoing internet connection except for example Firefox with default windows firewall? I would like to block everything, even including windows ...
Mojtaba Reyhani's user avatar
9 votes
1 answer
3k views

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 use ...
Samantha's user avatar
45 votes
5 answers
53k 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 ...
ritter's user avatar
  • 735
8 votes
5 answers
25k 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 ...
William's user avatar
  • 433
17 votes
4 answers
59k 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 ...
Mehper C. Palavuzlar's user avatar
16 votes
8 answers
38k 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 ...
fluxtendu's user avatar
  • 7,169
13 votes
3 answers
9k views

How to prevent applications from modifying Windows 7 firewall policy

I've set my Windows firewall the way I want it, but apparently any application can create its own rule to completely override my settings. How can I prevent this from happening?
Branko's user avatar
  • 133
6 votes
1 answer
845 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 ...
Mikeage's user avatar
  • 604
5 votes
3 answers
26k 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 ipchains?
user avatar
0 votes
1 answer
1k views

Port forwarding not working on router using NAT?

I have a Dlink router which uses NAT and I tried several ports but every time I try to connect my server(Raspberry Pi) it says connection refused. I can’t connect to the server on the RPi itself.
MIDAS's user avatar
  • 11
57 votes
7 answers
54k 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 accesses ...
Chris W. Rea's user avatar
  • 10.8k
32 votes
9 answers
332k views

How to bypass web URL filtering service to access blocked websites (proxy) [closed]

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 ...
kenorb's user avatar
  • 25.3k
20 votes
7 answers
69k 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 ...
WilliamKF's user avatar
  • 7,898
16 votes
3 answers
76k 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 ...
Tom de koning's user avatar
7 votes
4 answers
2k 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 ...
guillermooo's user avatar
  • 2,143
7 votes
9 answers
5k 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 ...
dancramer's user avatar
  • 123
2 votes
1 answer
10k views

Block ARP requests (or broadcast message, if possible) from A SPECIFIC HOST in a subnet

My ISP provide username-password for authentication and also register the client's MAC address for authentication. I am concerned about someone misusing my connection while I am not using it. ...
Sourav Ghosh's user avatar
1 vote
1 answer
184 views

iptables is treating traffic from different hosts differently in spite of rules

Something spooky is happening here and I don't know how to fix it. Summary: traffic that appears identical to tcpdump is being treated by iptables differently. Details below. Test setup: device ...
indianajohn's user avatar
0 votes
3 answers
332 views

Trying to set up a home webserver using Ubuntu and Apache2

The steps I’ve taken: Installed Ubuntu on old laptop. Given the laptop a static IP address in local network of 10.1.1.12. Add a service to Netgear DG834GU router for port 80 TCP/UDP Set up a firewall ...
Angie's user avatar
  • 3
55 votes
2 answers
423k views

need iptables rule to accept all incoming traffic

For my test environment i want to accept all incoming traffic, can someone please give me the iptable rule to be added. My current iptables -L -n output looks like this Chain INPUT (policy ACCEPT) ...
user avatar
30 votes
11 answers
183k 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 in the listening state.
Vic's user avatar
  • 445
30 votes
6 answers
28k 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 ...
Nack's user avatar
  • 443
29 votes
3 answers
82k views

How to detect if a network is blocking outgoing ports?

How do I confirm if my network is blocking outgoing ports? I'm having issues accessing services on servers running on ports other than port 80 and 443. For example, I cannot ssh into any of my ...
Michael Altfield's user avatar
19 votes
13 answers
6k views

How to get past China's Great Firewall and reach blocked sites? [closed]

I wonder if there are any other users who are annoyed like me by the Great Firewall set by the Chinese Government. If so would you please present me an effective way to get on YouTube? Since it's ...
18 votes
2 answers
119k views

Using Windows Firewall to block a specific IP on Windows 10

For some reason I'm having some site pestering my LogMeIn account with a bad login. It is consistently the same IP. Rather than relying upon LogMeIn's rudimentary login security I'd rather entirely ...
greenber's user avatar
  • 663
12 votes
4 answers
9k 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 ...
seler's user avatar
  • 353
11 votes
1 answer
15k views

Ubuntu IPTables allow only allow 1 country

So I've been looking around on the net for a script that will drop all traffic to all ports except the http(80) and https(443) ports, and then only allow traffic on all other ports from country x (...
Austin Kregel's user avatar
10 votes
3 answers
4k 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 ...
allquixotic's user avatar
  • 34.6k
9 votes
6 answers
14k 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 ...
user1026169's user avatar
9 votes
4 answers
20k 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 ...
steampowered's user avatar
  • 2,667
8 votes
3 answers
4k views

Prevent specific application from using metered network connection

Windows 8 introduces the new category of metered network connections. Applications that are aware of this type of connection can choose not to use it in an effort to reduce connection costs. I would ...
Daniel Gehriger's user avatar
7 votes
1 answer
3k 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 ...
user56reinstatemonica8's user avatar
6 votes
3 answers
12k 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 ...
Karan's user avatar
  • 153
4 votes
1 answer
4k views

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 ...
microsmash's user avatar
4 votes
2 answers
3k views

how do torrent clients circumvent router's firewall?

Could anyone please explain me how the deluge torrent client can get incoming requests to my local machine from the Internet, while I'm behind router's firewall and do not have any port forwarding etc....
d.k's user avatar
  • 171
4 votes
2 answers
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 ...
superkinhluan's user avatar
3 votes
3 answers
20k 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 action=...
bernd_k's user avatar
  • 1,221
3 votes
1 answer
11k views

How to port forward on Genexis Platinum 4410?

I have checked portforward.com but it does not have anything regarding this router. I have searched the router console, but could not find anything other than inbound firewall rules(is that the same ...
Ashish Deep Singh Bhatial's user avatar
3 votes
1 answer
5k 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 ...
Nacht's user avatar
  • 693
3 votes
3 answers
1k views

Windows security alert

When I boot up my PC, I get these windows security alert message telling me to allow the programs and I have configured to open on startup through the firewall, then if I open an application E.G Steam,...
Antp's user avatar
  • 1,135
3 votes
1 answer
657 views

Establishing an SSH connection between machines behind firewalls

I have two machines, A and C, each of which is behind a firewall so they can’t accept incoming SSH requests on port 22. I have a third machine, B, outside both firewalls and I wanted to SSH from A to ...
pythonic metaphor's user avatar
2 votes
3 answers
276 views

What means 59.164.0.0/20

If I enter for example "block 59.164.0.0/20" as a firewall rule. Does that mean it blocks the IPs 59.164.0.0 to 59.164.0.20 or does it mean something else ?
Quandary's user avatar
  • 2,103
2 votes
3 answers
21k views

How make windows 7 firewall block all traffic

How can I setup windows 7 firewall so that it blocks ALL inbound and outbound traffic of all kinds, unless I am connected to a network that is designated in network options as public? I'd like to ...
tablesalt's user avatar
1 vote
4 answers
28k 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 ...
DanM's user avatar
  • 121
1 vote
1 answer
2k views

Unable to access local server using FQDN... but can access from internet

I have set up a home server on my local home network. I have a registered domain name & website through a hosting provider and have configured a subdomain A record with the hosting provider to ...
Mike O.'s user avatar
  • 11