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

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Modem -> Firewall -> Switch -> Wireless?

I'm setting up a home network for the first time. The best solution for setup that I've come up with is to have 1 wireless router serve as the firewall between the modem and switch, and another serve ...
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0answers
87 views

Define IPTABLES rule

I am working with a linux based UTM appliance and have some disagreement with the client on the operation. THere is a standard GUI to configure port forwards in the firewall but for some reason he ...
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1answer
808 views

Yahoo Mail behind a watchgaurd

I'm getting the following error when I open a thread in the new Yahoo mail behind our watchguard firewall Response denied by WatchGuard HTTP Proxy. Reason: header 'Content-Type' denied ...
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34 views

Monitor and limit network usage

A costumer of mine has some off site locations, where his internet usage is supplied by a cellular router. The router is connected to a switch and a WiFi hotspot. The client has a problem with ...
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2answers
76 views

How do I do this without an expensive firewall?

I've got a cheap-o Motorola Cable Modem for now and I hate it. I'm used to doing this with SonicWALL routers but life happened. I need a way to isolate these groups securely and keep threats from ...
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0answers
540 views

nc -v -w 1 111.111.111.111 -z 22 returns port 22 (tcp) timed out: Operation now in progress

Encountering a strange problem on my Ubuntu machine, trying connecting to 111.111.111.111 (example ip) via SSH fails. When trying to connect from other win machine its works. I don't have a ...
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0answers
148 views

Is Windows Firewall active on OpenVPN connection?

(This applies to "private" Internet browsing through a VPN such as privateinternetaccess.com) If I connect to a VPN using OpenVPN client on my Windows 7 box, will the Windows firewall be active ...
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1answer
1k views

Blocking incoming connections from IP in windows XP

I have a request to block any incoming connections from a block of IP addresses but they would like to leave the outgoing traffic alone (no block). Is there a way to do this in Windows XP? The ...
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1answer
133 views

Unable to access internet from Windows Command Processor

I am unable to access internet from the Windows Command Processor. Below is the output on doing a simple ping: C:\Users\vivekkumar>ping www.stackexchange.com Pinging www.stackexchange.com ...
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3answers
212 views

what is the purpose of the `unlock` command button of `gufw`?

gufw is the GUI version of Uncomplicated Firewall. What is the purpose of the unlock command button of gufw? This command button disappears once it is clicked. My configuration is Ubuntu 12.04 with ...
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1answer
632 views

website blocked by netgear firewall

I have a Netgear DGN10000 supplied by Virgin Media in the UK. It is running the latest firmware (V2.1.00.25_VG). For some reason it appears to be blocking all URLs which contain "microsoft.com" ...
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1answer
2k views

How to allow windows store apps and the windows strore to pass the windows firewall

I use the windows 8 firewall and I wanted it more secure, so I block incoming and outgoing connection. Unfortunately I realized that the windows store did not work as well and all application from the ...
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27 views

How to enable all windows application store and the store windows to pass the firewall? [duplicate]

I wanted to optimize the security of my Windows 8 firewall so I blocked both incoming and outgoing connections. I then proceeded to define certain exceptions. I realized that the Windows store is no ...
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2answers
85 views

Logitech Support telling us we have an unsecure network and trying to charge $99?

My boss is trying to set up a Logitech Webcam on his computer in the office and he called Logitech support, and they were trying to fix it and could not so he let him on his computer he said he could ...
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1answer
373 views

Iptables output with options unknown

I have been learning and studying up on iptables and port forwarding. There is a sample iptables output I can't decipher. It has the options --dir, --pol, and -m. Although I am familiar with -m it ...
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1answer
909 views

UFW rules for specific host / dynamic dns

How can I setup UFW (Uncomplicated Firewall) to add rules for specific hosts? Eg. I want to allow SSH only from yourpc.no-ip.org?
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2answers
286 views

Configure HP iLO MTU Setting - Site is behind several firewalls and MTU requires lowering for access

Just wondering if anyone knows how to adjust the MTU setting for a HP server iLO NIC? The site is behind several firewalls and we have had problems with other things that has required us to lower the ...
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1answer
2k views

Fedora's firewalld vs iptables

I am on Fedora 19. Is my understanding correct that as long as firewalld is up and running (and properly configured using firewall-config) the contents of the /etc/sysconfig/iptables has no meaning? ...
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1answer
556 views

Can we prevent vsmon.exe (ZoneAlarm True Vector service) from hijacking TCP connections

I just noticed that vsmon.exe from ZoneAlarm firewall started to act like proxy for TCP connections (I am guessing it's doing the same thing for UDP packets internally). I use TCPView.exe from ...
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1answer
82 views

Limit download over certain filesize through network

This is more of a network question rather than programming but Is there a way to limit a download over lets say 20MB to throttle at 16KB? I am trying to limit files over 20MB to throtle at lets say ...
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105 views

Residential ISP possibly blocking SSH and other odd high ports - how to verify?

I have recently had a problem in a scenario where I am having to run SSH and some other high number port services behind a residential connection. I am suspecting that the ISP is performing some level ...
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2answers
184 views

Keeping a slowish DSL connection responsive

I have a Linux box serving as a firewall/router for our home network. I live out in the boonies, so I have a relatively slow broadband connection: Downstream Rate 7616 Kbps Upstream Rate 512 ...
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1answer
214 views

How to tunnel a port from a server behind a firewall to a remote server that allows connections via ssh?

I have a scenario where I need to open up a port for a server behind an ISP that appears to be blocking traffic. In this case I have a dedicated server remotely that I can ssh into and use whatever ...
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1answer
269 views

Restrict access to ubuntu server by computer specific information (NOT by IP, preferably not MAC either)?

How would one go about restricting access to a Linux (Ubuntu) server such that only a selected group of computers could connect -- from anywhere? Something like CPU serial number, hard drive serial ...
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1answer
93 views

How to replicate couchdb instances behind home router firewalls?

What are the options (if any) to allow replication between couchdb instances without portforwaring the couchdb port on a home router? Assuming both couchdb instances are behind home router firewalls.
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1answer
182 views

SSH tunnel and firewalls

Can a firewall still block things off a tunnel going trough it ? I am testing my proxy with Dante in China and works flawlessly but I have the same config on a proxy in Ireland that goes trough a ...
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1answer
97 views

Proxy for joining two inbound connections from separate locations

Good day, I have two computers behind firewall with no port forwarding set up. These two computers need to communicate with each other by using only outbound connections. I'm looking for a proxy ...
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127 views

java is listening from :::0 Causing firewall dialog that appears then disappears

Every 3 hours or so on my mac, a firewall dialog appears and disappears almost instantly. It lasts long enough to be annoying, but not long enough to read it. When it happens, I check appfirewall.log ...
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1answer
1k views

Port forwarding, remote host, no-ip (static IP access) problems

Im trying to run my custom game server on my local machine. I used no-ip.com to create a static internet location for my game to connect to. I downloaded their DUC program that should access my data ...
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2answers
462 views

Openvpn suddenly stopped working on some laptops in my college

My College: The LNM Institute of Information Technology What our tech department uses: Cyberaom Firewall for userid authentication What we found out 3 months back: OpenVPN was our solution to ...
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196 views

How to access Ubuntu local web server from a different apartment

I have set up an Ubuntu Apache web server with a four years old laptop. And my web application needs to be used from a different apartment, from my ground floor shop. Actually, I'm an intermediate web ...
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1answer
552 views

Internet access to host behind firewall using ssh tunnel

My goal is to give host behind firewall access to the internet. Below you can find brief description of network [internet] <-> [proxy] <-> [A] <-> (firewall) <-> [B] [A] - ...
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497 views

Allow only VPN traffic with GUFW not working

Running Kubuntu 13.04 I have read this tutorial about only allowing torrent traffic with GUFW but it seems this is not working for the browser. My torrent application is working but I cant browse any ...
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1answer
198 views

Disabling Windows 7 Firewall when Behind a Hardware Router

Is it safe to disable Windows firewall when I'm behind a router? I'm having a few Origin connection problems that I'm hoping can be resolved by disabling Windows firewall. I'm assuming that the ...
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834 views

Connecting to a machine via remote desktop when blocked by firewall

I am at a client site, and have a machine on Azure which I need to RDP onto. The machine I have to work on is very locked down, as is the network, and as a result remote desktop just isn't connecting ...
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123 views

Possible Firewall Issue

WHen I try to access the internet through IE with the follwing proxy details , I am able to access ineternet succcesfully Proxy : MyProxy , Port: 88 But when I try to access the same ...
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1answer
1k views

Configure LFD to not block emails for failed login attempts

Is it possible to configure LFD in ConfigServer Security & Firewall for cPanels WHM to not block failed logins for e-mails? My legitimate users are being blocked more than hack attempts for e-mail ...
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2answers
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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 ...
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1answer
2k views

Allow all inbound traffic from specific IP addresses

I am running one of our server applications on Windows 7 and I'm having trouble with the firewall. The application receives various events over TCP from a network device but the connection port varies ...
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1answer
4k views

Redirect incoming https to local ip with iptables

I have a router with 1 network interface (eth0, public ip) and an alias for eth0:0, local ip 192.168.1.1. I want to redirect all incoming https (443) traffic to another server. I tried it with ...
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39 views

Security concerns with Open port

I am developer not an administrator. That's why i am here to get expert's views. My setup is of webform of 5 windows 2008 servers behind Cisco ASA5505 firewall. I have written a small application ...
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1answer
2k views

How to find CIDR subnet for a public Internet IP address?

Usually I do not worry about subnet of an IP address on the public Internet, but after I began using Amazon EC2 firewall, it got me thinking. EC2 firewall configuration requires an IP to be written ...
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1answer
1k views

How to easily determine, which outbound ports aren't blocked by firewall

I'm behind fairly restrictive firewall regarding ports, that can be used for connecting outside. I'm also running service on my remote box, and I want to connect to it. Problem is, that I'm unable to ...
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2answers
3k views

what does “-m tcp” mean in this iptables rule?

Firewall configuration written by system-config-firewall -A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
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1answer
2k views

tracert command is not working but able to access the same site through browsers

tracert [site name] is not working in cmd prompt. But the same site has been working in all of my browsers . Please find below output of command. I need to use this command in my batch file but there ...
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1answer
112 views

IPTABLES to block sites on browser

I am trying to block a specific IP address from being accessed using the browser on my system. I added a simple rule as below iptables -A OUTPUT -d <IP> -j DROP The site gets blocked in the ...
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2answers
2k views

Why don't outgoing TCP/IP connections need firewall ports to be opened?

While creating an incoming TCP/IP or UDP connection we need for a firewall port to be opened or to get privilege for the specified port. Why not for outgoing TCP/IP connections?
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344 views

iptables not working on DDWRT firewall

I have write a firewall rules for DDWRT router but I didn't work. What I needed is, I would like to set all my wireless user, once it reach daily quota which is 200mb it will disconnected from the ...
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1answer
116 views

WiFi router as firewall?

Trying to setup a wifi router, so that the wireless devices can only access a particular IP/port on the wired network. On "BT Voyager" router all the devices connected to the router can talk to each ...
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1answer
4k views

How can I prevent Windows 7 from automatically changing the firewall settings (turning it back on) when changing network location?

By default, the firewall is turned on on all my workstations. I want to disable it. That works just fine. However, if Windows thinks there is a change in the Network Location, the "Set Network ...