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

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UFW is active but not enabled why?

I was trying to setup a firewall in my Ubuntu 12.04 machine. After some struggling I got the following. Isn't this sounds a bit odd? thomas@thomas-K40IJ:~$ sudo ufw status verbose Status: active ...
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Windows cannot find the host name “download.microsoft.com” using DNS

When trying to download a file found on the Microsoft downloads center that starts with, for example, http://download.microsoft.com/download/6/8/7/(some_GUID)/(some_file_name.ext) i get a timeout with ...
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3answers
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Vyatta Firewall structure and Interface Direction

I've just purchased a Ubiquity EdgeRouter ER-8, and I'm working on configuring the firewall. In particular I'm confused about the direction "Local" for the interface I've defined as the WAN, and how I ...
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3answers
217 views

Creating a secure LAN within an insecure LAN

I have multiple computers on an insecure network (with third party, untrusted computers). My computers and the third party computers are all behind the same firewall. Currently my computer's software ...
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1answer
517 views

I want uTorrent to use one ISP, and all other applications to use another ISP

I have a Windows 7 based desktop with two LAN cards (NICs): NIC1 is connected to a router, which connects to a reliable ISP with a low data cap (Fair Usage Policy). NIC2 is connected to an ADSL ...
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How do I get the Windows 7 Firewall to prompt me whether to allow or deny a new connection? [duplicate]

Possible Duplicate: How can I configure the Windows 7 firewall to prompt me on outbound traffic? In Vista and before, new programs attempting an ingoing or outgoing connection would cause a ...
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1answer
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How to show the firewall log on a mac (Mountain Lion)?

Where do I find firewall log on mountain lion 10.8.2? I have a problem with refused connections and I want to see if the firewall prevents me from connecting.
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1answer
868 views

How can I check what outbound ports are allowed in a network?

On some networks (primarily corporate ones), the firewall restricts outbound connections to some port number. The allowed ports generally comprise of port 80, 11, 443, etc. Is there a way I could do ...
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931 views

ISP blocks the use of ssh?

I fail to use ssh connecting to my remote machine, the detail situation is as following: The remote machine is behind a firewall, but can be connected using ssh with port 45992. I used to connect to ...
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2answers
469 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 ...
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1answer
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Can my firewall block web-based emails?

I am not receiving emails in my hotmail account from one particular address. (They're not being filtered out as junk mail, before you ask) I have been given the suggestion that they are being blocked ...
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Local port forwarding on a mac

I need to have the mac take traffic coming into it on one port send the traffic to a different but still local port. I.e. Traffic comes in on port 1234 and transfers to port 5900 (vnc) This is ...
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1answer
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Firewall blocks localhost but only if it's turned on

I run XAMPP server on my Windows XP. If I try to access to http://localhost or http://127.0.0.1 it gives me this error: Could not connect to remote server This only occurs if my Comodo firewall ...
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1answer
311 views

Every single application in Windows 7 (even these not using internet at all, like notepad.exe) trying to access internet

After some recent AV/FW software update (Comodo) and restarting my computer, I was alarmed with big amount of warnings that application "x" (where "x" is pretty much all of what I try to run) try to ...
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1answer
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Block (or only allow certian) incoming IP addresses on Verizon FIOS Actiontec Router

I opened a few ports to the outside of my home network so I can get into a few of my machines from outside. When checking some logs, I noticed that I was getting scanned on some ports from various ...
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3answers
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How come I can't ping my home computer?

I'm trying to set up a vpn into my home computer in order to access files from wherever. I have the home computer set up with a no-ip dynamic dns program so I can always connect, and have also tried ...
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2answers
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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.
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1answer
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Any need to open Adobe socket policy server port 843?

So I've noticed that whenever I visit a adobe flash site I get entries in my outgoing iptables logs like netfilter:out dropped: IN= OUT=eth1 SRC=192.168.1.79 DST=91.213.212.48 LEN=60 TOS=0x00 ...
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2answers
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Detect what outgoing ports are bypassed by firewall

My school has a firewall which limits most outgoing ports. There're only TCP/80, TCP/443, TCP/21 allowed. Is there's a way to find out all the outgoing port allowed by the firewall? My current idea: ...
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2answers
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How to prevent applications from modifying Windows 7 firewall policy

Basically I've set my Windows firewall the way I want it, but apparently any application can create it's own rule to completely override my settings. How can I prevent this from happening?
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2answers
277 views

Prohibit internet access for all applications except selected ones (OS X)

Is there a tool that can be used to prohibit internet access for all applications except selected ones (on Mac OS X)? "Little snitch" can't be the answer, as it doesn't provide a simple "deny all / ...
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1answer
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How to quickly Enable/Disable Internet Traffic so that it ONLY goes to ONE program?

What Firewall program (preferably free) can I use to quickly enable/disable internet traffic so that it only goes to one program? For example, sometimes I need only one program (Program X) to be ...
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1answer
143 views

Interactive network sniffing

I'm looking for what essentially amounts to an "interactive" Wireshark. I am looking for a tool that allows me to view network traffic on a given port and allow/deny/modify traffic on a per-packet ...
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4answers
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Is there an interactive firewall for outbound traffic on Ubuntu?

I wish to prevent some programs from "phoning home", and to allow other programs to access only specific web servers. Is there any way to interactively allow or decline outbound communication from ...
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2answers
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Recommend a proxy server for Dropbox [closed]

I live in China and used Dropbox extensively up until it was blocked this last week. Is it possible to use a proxy server with Dropbox? Which ones should I try?
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424 views

How to identify what program is sending traffic?

I have a Macbook with the PF firewall Icefloor installed on it. I've been seeing a massive amount of traffic (multiple requests every single second) going out to IPs belonging to Google, even while my ...
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Why can't I edit firewall settings on my Netgear router?

My router is the Netgear WNR854T or firmware 1.4.38. I am trying to access the firewall configuration settings, but the link to get there isn't showing up. This is what I see: As you can see, the ...
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1answer
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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 ...
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2answers
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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 ...
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1answer
582 views

Looking for network monitoring software for Win7 x64 (similar to the one included with Sunbelt personal firewall)

I've upgraded from Windows XP to Windows 7 (64bit) and I found that the very convenient Sunbelt Kerio Personal Firewall will not work on this version. I hear the Windows 7 firewall is good ...
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Intermittent connection and “Firewall Blocked” log entries on Cisco DPC3939B with firewall “disabled”

First, I apologize if this question seems to be "all over the place". I've tried to sum it up as clearly as I could, but there are a lot of moving parts, so I've tried to be detailed with my ...
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How to configure Windows Firewall to allow all ports in use by IIS Express

My understanding of this technet article, per the page that brought me there*, is that I can configure the Windows Firewall to allow all inbound traffic on any port being used by a specified ...
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Windows 2008 Firewall - How do I restrict HTTP inbound to specific IP?

My goal is to restrict all HTTP inbound requests to a specific IP addresses. I thought it would be a simple process - but I am not getting the result desired I have modified a predefined rule called ...
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1answer
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Allow access from outside network with dmz and iptables

I'm having a problem with my home network. So my setup is like this: In my Router (using Ubuntu desktop v11.04), I installed squid proxy as my transparent proxy. So I would like to use dyndns ...
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543 views

Remote desktop on custom ports

We have an office with a Windows 2003 SBS server and a couple of workstations. I set up Microsoft remote desktop for each of the computer in such a way that anyone could remote into the computers ...
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1answer
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Why are SSDP multicast packets blocked on m0n0wall; how to unblock them?

My firewall logs are being flooded with logs of packets being blocked that i don't want to be blocked: Every 3 seconds there are 2 packets being broadcast from my machine: Interface: LAN Source ...
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3answers
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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 ...
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Setting up Multiple Routers (as Hardware Firewalls) behind a Home Router

I’ve currently got one computer behind a router with built-in firewall functionality, connected to a home cable-modem that has a single Ethernet port and one IP. I’m going to have to set up another ...
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Which Linux-based firewall supports IPv6?

Out of the box neither IPCop nor ipfire support IPv6, not even on the green interface (internal LAN). How do I add IPv6 support to one of them? If that's not possible, is there a linux-based embedded ...
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5answers
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ports I should block

I recently set up an Ubuntu Server at home, and the first thing I did was place the UFW firewall at full power. Bad move. I could not even "rlogin" to it. I just disabled the firewall, and would ...
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How do I block Steam?

Which ip addresses and/or ports/protocols do I need to block at my firewall to prevent Steam downloading updates? I want to prevent my housemates from inadvertently downloading Steam updates when our ...
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3answers
112 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 ?
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5answers
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Open-source firewall/router software (alternative to Kerio WinRoute) [closed]

I'm looking for an open-source alternative to Kerio WinRoute. Specifically, I want the PC running it to act as a firewall, router & bandwidth manager. Of the features I'm looking to use are: ...
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2answers
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Deny access to a port from localhost on OSX

I want to test a fallback strategy for my memcached driver (in case port is protected by firewall). How can I deny access to a specific port, on 127.0.0.1?
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2answers
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How to find DoS attack source IP address in windows server 2008?

I have a windows server 2008 R2 which is victim of a DoS attack. How can I find out which IP is the source of attack? I have a anti DoS module on IIS 7.0 which works fine but it seems destination is ...
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Do I need firewall in this setup?

My home network connects to the Internet via a cable modem which is connected to a router. This router is what connects my different network appliances together (printer, switch, computers etc). I ...
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2answers
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Log entry about “DoS Attack” on my router

I was looking in the log on my router Netgear WNR-2000 today and found this log entry: [DoS Attack: ACK Scan] from source: 78.72.133.126, port 27014, Friday, November 19,2010 10:49:04 What does ...
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2answers
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How can I configure my firewall to block Abobe Illustrator CC 2014 updates on Windows 7?

I have a very simple question. How can I configure my firewall to block Adobe Illustrator CC 2014 updates on Windows 7?
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1answer
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How can I enable the firewall via command line on Mac OS X?

I can use the Security & Privacy preference pane to enable and disable the firewall, but how can I do it with the command line - something with defaults write maybe?
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1answer
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Even googling not allowed ? Why?

Access has been denied 127.0.0.1! Access to the page: ...