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

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3answers
1k views

Is it recommended to run a firewall/router on a virtual machine?

Googling found me people saying running a firewall/router as a virtual machine is "dangerous" but none of them gives any reason as to why it is so. I also found posts from people who are successfully ...
0
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1answer
48 views

configuring juniper ssg 20 VIP

We have juniper ssg 20 and wanto access our camera system from outside network. I have defined a new port(82) on Policy/Services/Custom screen. And unTrust interface I have added new VIP service for ...
0
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0answers
44 views

Is google using Akamaihd CDN for some of its services?

I run a few captive portal system where we have akamaihd.net whitelisted because we want users to access some of the services hosted on akamaihd.net. Problem is now users can access google.com too. ...
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2answers
51 views

Unblock Utorrents ports

Recently our company has blocked all incoming ports by default. Since then I am unable to download from torrent sites. Our network engineers allowed to open the ports for me in which uTorrent is using ...
0
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2answers
118 views

How does a proxy sever get past a firewall?

So my school uses a firewall called smoothwall to keep us from going to a various number of websites, so i figured out that using a proxy server, in this case its Tor, would let me get past web panel ...
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0answers
827 views

How to unblock websites that are blocked by Cyberoam?

I'm in a crazy situation as my new company blocked many sites like Gmail and Facebook by using Cyberoam. I tried https://gmail.com and then added an exception but still no luck. The url of Cyberoam is ...
0
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1answer
79 views

Is it safe to turn off Windows Firewall on private network?

In windows firewall there got two options, one if for private network, and the other is for public network. As I am using CCProxy for my local network and it is suggesting to turn off firewall for ...
0
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1answer
35 views

why iptables is accepting all in INPUT?

As we can see in this, which is the default iptables on fedora 20 $ iptables -L INPUT --line-number Chain INPUT (policy ACCEPT) num target prot opt source destination 1 ...
0
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1answer
164 views

Windows firewall blocks remote desktop with custom port

I was able to use my remote desktop with custom port when I was using Kaspersky Internet Security. Now, I have uninstalled my Kaspersky and switch to Avast!. Therefore, the windows firewall is turned ...
0
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1answer
25 views

Why are the default options for Windows Firewall exceptions to allow on public but not on private networks?

I get the following dialog whenever Windows Firewall (on Win7 SP1) catches a new program trying to get network access: Why does it allow public by default but not private? Isn't public the less ...
0
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1answer
31 views

Is it bad to have a stand alone firewall that disables the native system firewall?

I've heard claims that firewalls such as the one that comes with Avast are better than others that disable the system firewall. Is it correct that it could lead to problems disabling a firewall built ...
0
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2answers
146 views

How to block all websites but a few with Windows 7 Firewall

How to block all websites with Windows Firewall, and then allow a few websites to pass?
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1answer
41 views

VPN error 800, when remote but not locally

I am going to spend a few days in my summerhouse, and i would like to have access to all my media on my server so i am trying to set up a VPN. I have followed a guide, and i am abe to connect to the ...
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2answers
107 views

Is Iptables blocking outgoing ssh connections?

I have been trying to do pulls from github and it keeps hanging. My iptables rules have no rules which block outgoing traffic but I cannot connect to github using either ssh or http. I can't even ...
0
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3answers
976 views

Allow dropbox through windows firewall when everything else is blocked

Using this solution I've blocked all internet access with windows firewall and made an exception to allow local subnet traffic through the firewall. How would I allow dropbox through the firewall as ...
0
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1answer
104 views

scramble https over http to avoid detection by Firewall

My campus has recently installed Fortigate Firewall and have started spoofing https certs. eg. Certificates appear to be invalid saying: "Google.com; verified by Fortinet CA" Is there a way to ...
0
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2answers
82 views

Block incoming traffic to the specified IP behind the router

My goal is to emulate network disconnection for a video streaming server behind the router in LAN network. The only restriction which i have that this settings could not be executed on video server ...
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1answer
30 views

Forbid files by extension in Windows 7/8

I want to forbid following actions on Windows 7/8: Zip and 7Zip archives to be unpacked/executed , especially when it's a self-extracting archives Exe files to be run dll files Any mentioned ...
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0answers
66 views

Block visitor from specific IP address in Windows Server 2008

I am trying to block all access from specific IP address. I tried add Inbound Rules in Windows Firewall by blocking all connection & program from a IP address (IP address of the other test ...
0
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1answer
84 views

Should fwknop be listening to a port?

I am trying to install fwknop on a VirtualBox Debian 7 machine. It installs with no error (apt-get install fwknop-server -y), i made the modification in /etc/default/fwknop-server file so daemon ...
2
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1answer
77 views

SSH: can connect to computers on local network but cant connect remotely

I have 3 computers running ssh server on them: PC1 is running Cygwin on Windows PC2 is also running Cygwin on Windows PC3 is running Linux and they are on the same network connected to same ...
1
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1answer
270 views

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 ...
0
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0answers
108 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 ...
0
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2answers
204 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 ...
0
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1answer
536 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 ...
0
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2answers
75 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 ...
0
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0answers
43 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 ...
0
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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 ...
0
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1answer
104 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 ...
1
vote
1answer
150 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 ...
0
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1answer
316 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 ...
1
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2answers
172 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 (!) ...
2
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1answer
917 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 ...
0
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2answers
149 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 ...
0
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1answer
563 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 ...
2
votes
1answer
39 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 ...
0
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1answer
31 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, ...
0
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2answers
45 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 ...
0
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1answer
104 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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0answers
98 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 ...
1
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0answers
101 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 ...
0
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1answer
145 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 ...
-3
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1answer
64 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, ...
0
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1answer
179 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: ...
0
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2answers
135 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 ...
0
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3answers
610 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 ...
0
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2answers
437 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 ...
0
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1answer
128 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 ...
0
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1answer
66 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
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2answers
264 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 ...