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

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Can't connect to Windows Server 2012 on Amazon EC2 through FTP over internet

I have a Windows Server 2012 on Amazon EC2, with IIS FTP set up and working (through local IP address of the machine within EC2). However I cannot connect to it over internet. In firewall I have ports ...
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181 views

windows 7 block IP broadcast message

I am running a client application on my Windows 7 machine, it sends a IP message to another server machine on the local subnet, then server reply with a broadcast IP message with destination of ...
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2answers
276 views

Is it safe to run Windows XP behind firewall

I have a Linux Mint host running Windows XP Virtual Machines with VirtualBox. The XP VM's are connected to the internet via the host. In the Linux host, I have blocked every port with a firewall ...
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1answer
1k views

Forwarding all incoming traffic on eth0 to go to eth1

I am trying to setup my raspberry pi to sit between my router and my modem. I'm basically trying to set it up as an intercepting proxy so that all web traffic goes through the proxy. I have the ...
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2answers
112 views

OSX Mavericks - disable network request after application build

When I compile my application on OS X and then run it via openmp on 4 cores the OS X firewall constantly asks me regarding network permissions. (It doesn't need network permissions, so this is even ...
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48 views

How can I confirm if a process is being blocked from communicating on a network?

I have a user system with a third-party vendor product that needs to communicate with the network. We're noticing symptoms that suggests that the program/process is being blocked from communicating ...
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1answer
29 views

Searching a firewall for web with html keyword replacing capabilities

I'm searching for an utility (better free) or an add-on for Firefox that intercepts the http traffic and replaces or deletes some keywords in the html source, basing on a pre-defined user edited ...
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1answer
169 views

5 Feb 16:53:26 ntpdate[414]: no server suitable for synchronization found

I want to setup ntp in beaglebone based custom board. /etc/ntp.conf file content is as mentioned below driftfile /var/run/ntp.drift server pool.ntp.org server 1.in.pool.ntp.org server ...
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1answer
254 views

bind/named not working on UDP from external

This one is weird. I've set this up a long while ago, on a centos5. From what I remember, it used to work. For some time now, it's not. I've just been informed so no clue what changed when that made ...
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1answer
520 views

How to Block ALL incoming/outgoing internet traffic EXCEPT streaming to an Xbox?

How can I block all incoming/outgoing internet traffic except streaming to an Xbox 360? For the past few weeks, streaming video files from my PC to my Xbox 360 has started failing, with the videos ...
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2answers
284 views

Source port 443?

I'm might embarrass myself with this question, because of something really obvious, but I'm puzzled. My home broadband firewall log says it has been blocking incoming TCP traffic with a source (!) ...
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1answer
2k 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 ...
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228 views

Blocking ransom-ware like Cryptolocker

Here's the scenario. We've got around 15 - 25 physical machines, a few virtual ones, 3 or 4 file servers, mobile devices - the works in a single domain. A user reported that they'd been infected with ...
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1answer
1k views

How to configure ufw-firewall for OpenVPN

I am running a VPN via IPredator on Ubuntu 12.04 Desktop, which works perfectly, when ufw is disabled. When I enable ufw, I logically cannot establish a connection. IPredator states that I have to ...
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1answer
50 views

Does Windows Firewall have a log?

I am trying to set my router to forward three of my ports for EchoLink. But I'm having trouble with it. I'm Using the PFPortChecker to see if the ports are open, it says they aren't, but to check my ...
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1answer
51 views

is it possible to link different email accounts to different network profiles?

My work firewall for wired internet blocks almost every port except http, https and maybe a few other web-related ports (993, 465 and everything else to do with IMAP is blocked). Impenetrable for, ...
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2answers
60 views

What servers can be safely blocked when surfing the internet?

So I finally got a firewall for my Mac. First of all I was shocked to see how many connections are being established during regular internet browsing (especially by Google Chrome). Surfing a typical ...
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1answer
189 views

Disable Kaspersky firewall in favor of Comodo Firewall

I have recently bought and activated my Kaspersky Internet Security, and it conflicts with my Comodo Firewall which was installed before. I want to disable Kaspersky firewall, but to keep their ...
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149 views

Setting up Windows Firewall to only allow local traffic for specific port

I have spent the past few hours trying to figure out how to use Windows Firewall on a Windows 7 Home Premium computer. From what I can tell, it was definitely designed for computers in business ...
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175 views

Block Youtube HD content on home network

I have a DSL connection that terminates into a "beetel 450tc2" Modem/Router. I have 2 laptops (Mac Book Pro and Windows 8) and about 5-6 Phones/Tabs connecting to this network over WiFi. My problem ...
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1answer
343 views

How do I block every connection except vpn and ssh without endangering the state of my vps?

I have some vps space but I get alot of scans based on what I see in iftop. I tried some iptables stuff but it gets tiring and useless to put all the ips that I see in the logs. I am wondering about ...
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72 views

Why does my router try to connect with my computer every 1-2 minutes? [closed]

I have every ingoing connections blocked by default. When I was watching syslog, I noticed that my router (192.168.1.1) tries to connect to my computer every 1-2 minutes (of course it can't connect, ...
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1answer
543 views

How to disable SuSEfirewall2?

How can I disable SuSEfirewall2 from the shell (without yast)? We use OpenSuSE 12.3 I tried it: workdevel123:~ # systemctl disable SuSEfirewall2.service But I think this is not the solution: ...
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2answers
193 views

Firewall - Allowing DNS for allowed domains only

Some firewalls blocks domains on DNS level. It stops getting IP addresses by ping or other DNS query for those blocked domains. I tried creating a firewall using iptables, but it still sends an IP ...
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3answers
2k views

Source Address / Source Port vs Destination Address / Destination Port

I am new to TCP/IP and trying hard to learn basics. Well, I really wonder about inbound rules and outbound rules of Firewall and concept of source adress:port, destination adress:port. For example I ...
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1k views

OpenVPN client behind corporate firewall

I cannot connect from the corporate network at work to my OpenVPN server. However, with client and server settings untouched, connecting from other networks works. I can only assume that this is due ...
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1answer
220 views

UFW default rules… where are they?

In the tutorial on UFW here https://help.ubuntu.com/community/UFW it says that UFW uses the default rules if enabled and not configured. I checked the folder: /etc/ufw/ and the files I found ...
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1answer
119 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 ...
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2answers
589 views

SSH to a computer behind a firewall and router

I'm trying to connect to my Raspberry Pi, which is behind a router and a firewall. My PC (running linux) is also behind a router and firewall. Both firewalls only allow the ports you would need for ...
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2answers
48 views

Is Microsoft's Photosynth app blocked in China?

I've been making photosynths for a few years on my travels but in China I can't seem to log in via the Photosynth app. I get this error: (In fact I hadn't realized until now that it's tied in to ...
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1answer
114 views

How are they blocking RDP on port 80?

I'm on a corporate computer that is behind a very restrictive firewall, and trying to connect to my home computer. I configured my router to forward port 80 to 3389 (RDP port). My idea was to try to ...
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1answer
1k views

Samba server cannot be access across the internet

I have a computer at my house running Ubuntu Server 12.04 that is mapped to an external ip address. The server is running a Samba server with one share. Here is the configuration file: ... ...
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60 views

Setting up port 3360 access on McAfee firewall using windows 7 for network access

I have a windows 7 machine serving me PHP / mySQL etc i have set is all up well and is all working on local machine as well as on local network machines. My issue is that when i try to connect ...
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465 views

Opening port on mac os x (mavericks) for nodejs

I am running a node.js app locally and would like to make it available for demo for outside world. It is running on port 3000. I have added node to the firewall to allow incoming connections but ...
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2answers
904 views

Wifi router blocks wireless peers from connecting each other

What option controls that wifi router blocks wifi peers from connecting each other. I have wifi router Dlink Dir-320. With that router I can't ping (or connect via FTP or HTTP) one laptop from ...
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1answer
228 views

Configure Packet Filter with white-list and black-list

I’m trying to configure Packet Filter on a FreeBSD server with a black-list of addresses/networks to block and a white-list of trusted users which cannot be blocked (black-listed). Here is my first ...
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1k views

Fedora 20 FirewallD GUI not working on X11 forwarding

I am having a problem with SSH X11 forwarding on Fedora 20 with firewall-config, the GUI tool for FirewallD (the dynamic firewall system). With most X11 GUI applications including pretty much all ...
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1answer
144 views

iptables detects clients behind NAT?

I'm setting up a server that I want to protect from DoS attacks, by setting a limit using iptables: iptables -A INPUT -p tcp --dport 80 -m limit --limit 25/minute --limit-burst 100 -j ACCEPT (default ...
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193 views

Secure reverse UltraVNC connection to bypass firewall

My clients and service run on mostly Windows 7. I need help setting up a secure reverse connection with UltraVNC between me and a client.(Me=Viewer, Client=Server) Here is my situation: I want to ...
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1answer
53 views

How to check company firewall

I am trying to ping to an external APIs IP address. But the command times out sooner than its completion. Now I think the company firewall and proxy might be a hindrance in this. How do I check the ...
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1answer
96 views

How to use google search via SSH tunnel?

I live behind the Great Firewall of China (not very proud of it) and I'm slightly technical. So I use SSH tunnel to route all connection to my VPS. (i.e. ssh -D port and then set localhost:port as a ...
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79 views

Setting home computer as www web server

I know I'm seriously missing some steps. I need to set my home Fedora 19 running computer as a web server and available it to internet. Its behind a normal home broadband modem connection. my ip ...
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1answer
103 views

how to restore iptables after iptables -F?

I used iptables -F on my machine, and what can I do to recover the iptables into the default without rebooting my machine? I restarted the iptables service and it failed, and I can't find iptables ...
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3answers
3k views

How can I turn off internet for roommates that haven't paid the bill this month?

I have several roommates who split my internet bill with me each month. On occasion they forget to pay me, and I have to pester them for the money. If after 3 days of pestering they still haven't ...
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40 views

Download stops in all browsers and download managers on Windows XP

I have Windows XP on my desktop and I can't download anything on it. Download stops after a few seconds or even doesn't start. I've tried using Firefox, Chrome, IE, different download managers, but ...
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42 views

Windows update not working with devices that have outbound firewall rules

We currently have devices that have all outbound traffic blocked with the exception of certain applications such as Google Chrome, Internet Explorer, etc. This however limits access to Windows Update ...
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2answers
824 views

Connecting PS4 through SonicWall TZ100 firewall | Sony Error NW 31162-3

I am attempting to Connect my PlayStation 4 through my SonicWall TZ100. I have below Ports Forwarded. I'm not great with Packet capturing, but as far as I can tell nothing is getting bounced that is ...
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422 views

Is Comodo Firewall and Zonealarm Firewall compatible with avast free 2014?

on windows 8.1 currently using avast free antivirus 2014 ,is it possible to use free firewall like comodo or zonealarm with it simultaneously with avast?After installing any will problem occur?
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767 views

Windows 8.1 update service error code: 80240438

I updated to Win 8.1 recently and I've got this issue. In windows firewall I block all inbound connections and all outbound connections that do not match a firewall rule. I create a custom firewall ...
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1answer
210 views

Iptables limit user access time and mac

I am trying to create an iptable chain to kick my daughter off her ipad during the night. With the mac only filter I can block access but when I add time it no longer works. Does anyone see an issue ...