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

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14k views

Windows 7 is blocking ports

I am trying to open port 80 and 3690 for HTTP and svnserve respectively (inbound for both). I have Windows Firewall off, and have tried temporarily disabling Mcafee VirusScan Enterprise, to no avail. ...
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4answers
205 views

IPtables keeps resetting rules and blocking almost everything

Every time I reset IPtables, the rules keep coming back in about 10 minutes, blocking everything besides port 22 and 80. When I do a "iptables-save", I see this I can't find out where it's coming ...
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4answers
77 views

Would a switch be covered by a router's firewall

I need more Ethernet ports on my home network. Sadly, we already have an old router connected to the main router and we still need more ports. Would the devices connected to the switch be ...
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3answers
2k views

Cannot connect to WEBrick on home network

I'm an Android developer and often my applications require server-side code. I typically use Ruby on Rails for the web app, and during development will run the server on my local machine (Mac OS X) ...
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3answers
862 views

linux routing outbound port 80 traffic via ssh tunnel, iptables, or a simple route

I have two hosts, A and B. Host A hosts services on port 8080 and has outbound internet firewall rules allowing port 80 and 443 access to Host C. Host B is on the same subnet as Host A. Host B is ...
1
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3answers
2k views

Blocking ads at the firewall level

Possible with the proper firewall rules or proxy setup? For example, when an ad loads, at the bottom you can usually see the domain it is loading itself from. I figure block the major ones in a proxy ...
1
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3answers
117 views

How to fix a webserver that allows quick access to some networks and not all?

I have a web server thats hosting a couple of websites on it. On my home network and on my 3G iPhone the websites load really quickly, even after the cache has been cleared. But when I get to ...
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3answers
1k views

Can't get samba to see other PCs in Kubuntu 10.04 (Lucid)

I'm new to networking. I'm trying to share a folder between to computers (both have kubuntu 10.04 installed). I'm able to share a folder with samba and can see that folder through samba on the same ...
0
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3answers
632 views

Secure FTP Port between Filezilla and Godaddy

I recently upgraded to Filezilla 3.0.x I am getting "filezilla error: Failed to retrieve directory listing godaddy" errors from Filezilla which i believe is because of a blocked port on my firewall ...
0
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3answers
63 views

Is the any way other then ping to detect internet connection?

I have a rails server (Linux). I can open the site with machine A. Using machine B I just can use ssh port to connect it, but it cannot open the site and the rails server cannot detect the http ...
0
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3answers
93 views

How can I connect to a VPN with a restrictive network?

I have recently relocated and the network I have been provided blocks every outgoing TCP port except for 80 (http) 443 (https) 465 (smtps?) 587 (submission) 993 ...
0
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3answers
82 views

Changing the ports a program uses

This question might not even make sense. I have a very limited understanding of how networking protocols work. My phrasing of these questions might be very poor. My school has a firewall enabled. ...
0
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3answers
312 views

How can I protect a PC that is directly connected to the Internet?

How can I protect a PC that will be directly connected to the Internet? There won't be a router — with it's semi-protective NAT — between my PC and any script kiddie on the Internet. What ...
0
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3answers
113 views

how do i set up this firewall?

i use fedora 13, and i have firewall turned off now. but i want to allow all incoming connections and outgoing connections except to a port P. i want to allow connection to port P only from certain ...
0
votes
2answers
648 views

How can I get Windows 7 firewall from being stuck in public network?

A few weeks ago, my Windows 7 Firewall switched itself from a private network to a public network. I noticed the problem when I was trying to stream a movie from my computer to my TV (as I did dozens ...
0
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2answers
360 views

ping behind firewall, success for some hosts, fail for others?

I'm under firewall, I can ping to some hosts but not to other hosts my IP addresss 172.19.7.111 mask 255.255.240.0 I can ping to host 172.19.2.111 (that I discovered with Angry IP Scanner) but not ...
0
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2answers
588 views

UDP Flood to Host in the firewall logs

When the router's firewall logs shows as follows UDP Flood to Host PRIVATE_LAN_CLIENT_IP, PORT ->> EXTERNAL_PUBLIC_IP, PORT (from WAN Outbound). Will those packets be routed to the private lan ...
0
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2answers
450 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
455 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 ...
0
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2answers
362 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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2answers
75 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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2answers
249 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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2answers
236 views

How can I view my Windows 7 firewall settings?

I am using a work laptop and can't seem to locate my firewall settings. I go to Control Panel > System and Security and I do not see firewall settings anywhere. Could there be some policy that is ...
0
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2answers
13k views

How to open a specific port in Moutain Lion Firewall

I cant seem to find how to open a specific port in the ML firewall? I know you can give applications permisiion, but thats no good to me. Is there a way I can specify a specific port?
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2answers
1k views

CSF/LFD - would I really need CPHulk enabled also?

So if I have the default configuration of CSF/LFD firewall running, should I enable CPHulk, or does CSF/LFD already do what CPHulk does? If the answer is "No, CSF/LFD does not do what CPHulk does", ...
0
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2answers
2k views

Cannot access my website from outside my localhost

I have test website on my system (MacBook Pro with Mac OSX Lion). The website is served by nginx listening on port 8000. The listen configuration is listen 8000 default, so it should be open to accept ...
0
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2answers
376 views

Forbid connection to IP address in hosts file doesn't work?

The hosts file is used to map hostnames to IP addresses. However, I only have an IP address. I tried using HostsMan, but it doesn't want to even add the line. How do I add a line to the hosts file ...
0
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2answers
131 views

How can I use an extra desktop as a basic home firewall?

I have an extra desktop PC with 2 NICs that I'd like to use as my home firewall. I'll install a linux distro meant to be used as a firewall on the desktop. I was thinking of placing it in between the ...
0
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2answers
940 views

Open a port safely in firewall for a PC connected to Internet

This is related to this question PCs in same network can not communicate My real problem was that I have a web application I want to test running in PC1 but I noticed I could not even ping the ...
0
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2answers
292 views

2nd NIC for home linux proxy server

I have an old powerbook g4 (power pc), which is about to get debian 6 installed on it. I was considering using this powerbook as a home proxy/firewall so that I could get a better grip on iptables, ...
0
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2answers
445 views

task manager for Internet usage, I need to block a software accessing a website/web server

I have a software that accesses a website, I want to monitor what website is it accessing and block that website. Is there a software similar to "windows task manager" that allows you to monitor ...
-1
votes
2answers
367 views

port listening and home router security

I have a Dishtv receiver with sling adapter. The receiver is connected to my router. The router is a netgear DD-WRT flashed router. I was told be a dishtv rep that the router use port 80, 443 and ...
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2answers
349 views

How to allow safari through firewall windows 7?

I turn on my windows 7 firewall and was unable to search for option to allow safari access to internet. Can anyone help me?