Questions tagged [firewall]
Software that controls what connections can be made to and from a network.
144
questions
13
votes
6
answers
6k
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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 ...
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 ...
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 ...
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 ...
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....
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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?
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 ...
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?
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.
57
votes
7
answers
54k
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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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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. ...
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 ...
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 ...
55
votes
2
answers
423k
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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) ...
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.
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 ...
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 ...
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 ...
12
votes
4
answers
9k
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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 ...
11
votes
1
answer
15k
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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 (...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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....
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 ...
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=...
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 ...
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 ...
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,...
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 ...
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 ?
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 ...
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 ...
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 ...