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

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191 views

How to simulate yourself as if you are located internally behind the trusted zone of a FW

I work in security operational center engineer in one company. We manage a lot of customer FW, proxy,..etc. An example of our daily tickets could be the user can't access some site, so we check the ...
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1answer
2k views

How to allow Dropbox to auto-update by adding an exception to ESET firewall?

I am using ESET Smart Security v5.2.9.1 and Dropbox at Windows 7 x64. The problem that I am facing is that every time Dropbox wants to auto-update, it downloads an updater file that has different ...
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1answer
5k views

How to setup firewall to allow internet connection sharing via Wifi USB stick?

I have a Windows8 computer linked to the internet via an ethernet cable ("Ethernet" network connection). I have attached to it a DLink Wifi USB stick, and I'm trying to share the main PC's internet ...
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1answer
100 views

Strange router's firewall behavior on Linux

I have router, static ip and when I start Minecraft server on Windows, anyone can connect to it, but when I start server on Linux, only players from my local network can connect. And other players can ...
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1answer
235 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
74 views

Odd port 46253 activity getting through the firewall

I've been reviewing the log file for my personal router/firewall WGR614v9 and, though I have 8 active hosts on the network, I keep seeing connections to port 46253 to one of the Windows7 hosts at ...
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1answer
240 views

Configuring a Power Mac as a Gateway

I have a Mac OS X Leapord Server v10.6.8 installed on an Xserve and currently have things set up in the following order: ISP --> Router --> Switch --> Server --> iMac. I also have a ...
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1answer
269 views

Is there any way to set up a malware-blocking transparent proxy on an Airport Extreme?

I'd like to add some kind of easily-administered transparent HTTP proxy to my home network. Ideally, it would allow me to, for example, redirect web requests to blacklisted servers into nothing, block ...
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1answer
206 views

Block websites to a certain IP range with mikrotik router

I have a MikroTik Router 951Ui-2HnD that connects my computers with the ISP. I want to block Youtube and Facebook but only in a few computers. I created a Layer7 Protocol with: Name : Denied Websites ...
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1answer
30 views

Trouble with last DROP rule in iptables

Let's say I want four ports to be opened for any incoming packets so I made this ruleset: #> iptables -L -v Chain INPUT (policy ACCEPT 20 packets, 1190 bytes) pkts bytes target prot opt in ...
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1answer
39 views

opened port on router for java socket

I am trying to make a peer to peer application and I want a port to exchange connection information and I want to ensure that this port would not be closed from the firewall on the way between peers ...
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1answer
54 views

Open ports in Ubuntu 13.10 server

Im setting up a realtime gameserver fps-game, and then i need to configure ports. Just to mention, i will setup multiple servers for this game on the same ip address, which means i must open multiple ...
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1answer
137 views

No Internet Connection on using Buffalo WHR-G300N

I have used the Buffalo WHR-G300N over 2 years while I will use it for connecting all of my devices to Internet @ home. However, two days ago, I have the issue that the router suddenly disconnected ...
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1answer
230 views

Game Client's Listening Server Unable To Establish A Successful TCP Connection (Updated)

Scenario, A Risk of Rain On a game called "Risk of Rain" (RoR), I am hosting my own listening server. However to my demise, it seems that nobody can successfully join my server. I have done the basic ...
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1answer
376 views

Windows Firewall inbound rules still blocks ports

I applied inbound rules for port: 1935, as well as outbound. When I check on canyouseeme.org, it says it (port 1935) times out. When I completely turn off Windows 7's firewall, it works without a ...
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1answer
573 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 ...
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1answer
274 views

Terminating OpenVPN after disconnect - how to disable reconnecting

I want my OpenVPN client application (running on A) to quit when it is unable to connect (or reconnect) to a server (B). I use the UDP protocol. Both A and B are Linux systems. More precisely, I keep ...
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1answer
22 views

i am not able to connect to the application hosted on port 80

I am trying to access an application that is hosted on port 80. When i try the url from my personal computer , the site is not reachable but the same url on the server( which hosts the application) i ...
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1answer
716 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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1answer
829 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
384 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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1answer
469 views

Need iptables commands to permit all WAN originating traffic to enter the LAN side of a router

I have three routers. Router0's WAN interface connects to the ISP, and the WAN interface of Router1 and Router2 connect to Router0's LAN interfaces (i.e. hard wired). So this is what it looks like, ...
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1answer
165 views

ssh to Amazon EC2 Ubuntu server behind firewall

I ssh to an Amazon EC2 server and have just enabled the ufw firewall. This terminated my connection and now I can't ssh back in. I assume the firewall is preventing access. I tried rebooting but no ...
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1answer
896 views

Window 8 machine cannot ping devices on same subnet

After returning from vacation during which several Windows updates were applied and my router suffered a hard power cycle, my Windows 8 Desktop can no longer ping other devices on the same subnet. ...
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183 views

Is it possible to granularly configure OSX's application level firewall?

From looking at the UI in the System Preferences App, it looks like the application firewall rules in OSX's firewall are "all or nothing" -- "Allow all" or "Block all" effectively. I'm under the ...
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1answer
42 views

Filtering downloading a file

I know there are several types of firewalls operating at different layers of OSI. ACLs(layer 3 firewalls filter based on port numbers and IP addresses), SPI(which examines the patterns of data at ...
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1answer
211 views

Log is full of “stealth mode connection attempt”s

My daily log is full of messages like: 8/25/12 8:27:01.385 PM Firewall: Stealth Mode connection attempt to UDP 192.168.1.101:40959 from 109.254.109.20:1098 where 192.168.1.101 is IP of my mac. ...
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1answer
109 views

Consumer Router/Firewall qualities which are compatible with IP phones

I use a SIP phone from home over an internet connection to connect to a PBX in the internet. The internet connection is 50 Mbps down / 10 Mpbs up. Empirically I have tested several routers and found ...
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1answer
644 views

Running Smoothwall in Virtualbox

Okay so here's my deal,I need to run Smoothwall in a VM using Virtualbox running on a host PC with two physical NICs. I have some roommates and we are all sharing one internet connection which ...
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1answer
313 views

Stopped windows firewall service during ICS, how is this possible?

Although windows firewall is required to be on when you "start" Internet Connection Sharing, you can stop the WF service with MMC. When done a client can still use the host machines internet. The ...
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1answer
1k views

Telnet-ing to alternative SMTP port: “No route to host”

At home is a Mac Lion Server running a mail server. I have a VPS thats used as relay for incoming mail, to prevent problems when my home server might go down. Because my ISP sometimes blocks port 25, ...
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1answer
81 views

Logging into Windows Live from Zune Desktop vs. web

In my company, IT has blocked the use of Windows Live Messenger client, but I am able to log in to Web Messenger just fine. When I try to sign in to the same Live ID via Zune Desktop software ...
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1answer
287 views

How to disable Wii updates through router filtering?

Since there is no way to disable Wii updates through the device itself, I was wondering if anybody knows what IP (or any other identifiable information) the Wii updates come from? I was thinking that ...
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1answer
475 views

Shorewall NAT problem

I have installed and configured Shorewall with two ISPs. I want to provide Internet access to the clients and the other connection for servers connection and NATs. I can navigate both from the ...
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1answer
60 views

Firewalls local connections

I have question about blocking local connections by desktop firewalls. Is there any trend where firewalls block local connections by default or rather they allow local connections. I want to make app ...
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1answer
198 views

Web access control for a Mac environment

Our home environment is all Mac. I wish to have more control over net access than I can manage using 10.6 or 10.5 Parental Controls. I don't want to install poor quality or unreliable software. I'm ...
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1answer
63 views

Proxy to collect Domain addresses

Our company IT is requesting a list of domain's we regularly visit to allow them through the newly installed firewall (insanely stupid, I know). Is there a Proxy server which Can sift through the ...
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1answer
3k views

UDP blocked by Windows XP Firewall when sending to local machine

I work for a software development company but the issue doesn't seem to be programming-related. Here is my setup: Windows XP Professional with Service Pack 3, all updated Program that sends UDP ...
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1answer
634 views

Why is my Ares not Working?

I recently increased my blink broadband speed and now my Ares is not connecting. I spoke to the blink peeps and they deactivated my firewall..but Ares still is not working. What do i do?
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1answer
115 views

Outpost Firewall asks every time one specific application tries to access to network

One of installed applications on my PC tries to send UDP packed. Outpost warns me about this. I say that Outpost should allow all activity for this application. But next time application wants to ...
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1answer
45 views

linux: how to troubleshoot forwarded port?

My home internet connection has a static IP address (eg: 123.123.123.123) I have configured my router to forward port 9000 to an internal host (192.168.1.101), which is running Ubuntu 14-04. I run ...
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1answer
49 views

Windows8, website “blocked” .. or something, very weird issue

Run into a very weird issue on my Windows8 laptop tonight, which honestly left me baffled. When I try to open battleping.com in the browser, either Chrome or Firefox, they don't load, and timeout ...
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1answer
55 views

IpTables -j REJECT to instantly block the loading on user browser

I have been searching for a solution to notify the browser on user that the request is Rejected so stop loading it. Because I have blocked facebook and every page that have a facebook plugin is ...
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1answer
28 views

IPTABLES NAT port forwarding

I'm trying to setup a Linux box to act as a very simple 2 NIC router. I've read over the instructions on the bot Archlinux and Gentoo wikis and gotten the same result, masquerading works but not port ...
0
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1answer
54 views

Lync keeps dropping because of D-Link DIR-601 router. How to configure firewall to fix this?

I saw this article, and it's exactly my problem, but my settings are a bit different and nothing seems to have fixed it so far. Why does my D-Link Router keeps dropping my Outlook and Lync ...
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1answer
62 views

Limit Netgear Nighthawk AC1750 to given WAN IPs

I have a Netgear Nighthawk AC1750 router, and have SSH, HTTP, and several other ports forwarded to a server. It is not for public use, and will only be accessed by me. I've recently had 60,000 hits ...
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1answer
22 views

Should I allow or deny helpd file to establish connection in my Firewall on Mac OSX 10.8.5?

As in the subject line. Should I allow or deny helpd file to establish connection in my Firewall on Mac OSX 10.8.5? I would appreciate answer to that and more elaborate answer what exactly "helpd" ...
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1answer
63 views

No internet through OpenVPN

I am having trouble with my OpenVPN setup. I have a Linode box with an OpenVPN server installed on it and I managed to get Tunnelblick to establish a vpn connection from my mac. I followed this guide ...
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1answer
42 views

How to catch a tcp packet in windows?

I've got Windows 2003 server and i see in my firewall logs some denied tcp packets: about 1-5 per hour. It looks like that: 18:20:37 tcp 192.168.xx.y(4994) -> 104.28.25.67(80), 1 packet 18:39:15 ...