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

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Network bandwith monitoring per users [closed]

Please show me a fully open-source solution in this situation: Small network with about 30 pc with wireless cards. An Regular Asus wireless access-point which connected to the server. Server is a ...
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0answers
141 views

Network bandwidth & traffic monitoring [duplicate]

I have the following situation: Small network with about 30 PCs with wireless cards. A regular Asus wireless access-point which is connected to the server. Server is a normal x86 PC with Ubuntu ...
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1answer
7k views

How can I enable the firewall via command line on Mac OS X?

I can use the Security & Privacy preference pane to enable and disable the firewall, but how can I do it with the command line - something with defaults write maybe?
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1answer
41 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
2k views

Windows 2008 Firewall - How do I restrict HTTP inbound to specific IP?

My goal is to restrict all HTTP inbound requests to a specific IP addresses. I thought it would be a simple process - but I am not getting the result desired I have modified a predefined rule called ...
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1answer
10k 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
287 views

Where can I find a list of game servers so I can block them in the workplace? [closed]

Our company wishes to block all online mmorpg and other such games. I really don't want to block ports as sometimes some of the ports are used by our programmers testing our those ports. Our company ...
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1answer
1k views

mystery Internet traffic to port 445

Recently, I noticed traffic from the office network to TCP port 445 on the Internet [a]. Below are the Linux firewall log entries to Facebook's network [b] and Google's network [c]. I would like to ...
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1answer
225 views

Accessing a site using websocket behind University gateway

I'm trying to access lichess.org from the university network. I can access the site but when I try to join/launch a game, I keep getting reconnecting message. I emailed the admin and he told me they ...
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2answers
1k views

Unable to connect to Adobe Connect

I am having troubles trying to connect my colleges Adobe Connect. I have done the test meeting connection and it will say "Unable to connect". I have tried connecting on 3 other computers and it works ...
2
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1answer
1k views

Blocked outgoing SMTP socket connection in Windows

I have a private email sending application (Windows), which sends email notifications over SMTP protocol. This might look like a code question for StackOverflow, but it is not. The application works ...
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2answers
672 views

blocking port 80 via iptables

I'm having problems with iptables. I am trying to block port 80 from the outside, basically plan is we just need to Tunnel via SSH then we can get on the GUI etc. on a server I have this in my rule: ...
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2answers
1k views

How to prevent applications from modifying Windows 7 firewall policy

Basically I've set my Windows firewall the way I want it, but apparently any application can create it's own rule to completely override my settings. How can I prevent this from happening?
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1answer
186 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. ...
2
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1answer
98 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
108 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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0answers
205 views

How to open the restricted site if request is coming from the particular server

Is it possible to create some defination in firewall to open the restricted site (say facebook) if it is coming from the server where our application is hosted but restrict from anywhere else. ie.say ...
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0answers
68 views

Is it possible to let the access point handle the firewall rather than the main router?

I have two routers: one is ADSL, the other one is a broadband, and my line from the ISP is ADSL. So, I did use the ADSL router as the main one that handle the connection to the internet, and used the ...
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1answer
66 views

Is password required for restricted database servers [closed]

I have a dedicated Database server which is have PostgreSQL 9.1. This server has firewall. Only 10.0.0.3 is allowed to connect and access to this server via Firewall. All other requests from other ...
2
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1answer
211 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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0answers
103 views

Computer for some reason won't accept requests. Can send requests though. (All on LAN)

I'm on a LAN and I've been working forever trying to figure out what in the world is wrong. After much pain, I've come to this. I can ping Computer B and Computer B from Computer A but Computer A ...
3
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4answers
3k views

how to ssh two computers behind NAT and Firewall, without third computer

I am trying to ssh into my Linux box at home. My home is a dorm-style environment - NAT and Firewall with personal laptop running Arch Linux. My work is corporate style Windows 7 - NAT and proxy ...
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1answer
152 views

New router directs inbound requests to own WAN address to the settings page

I just replaced my old DLINK router with a Cisco RV180 (and a new zyxel nwa3560-n as AP). I have forwarded ports 80 and 22(ssh) to my servers local ip. When I use my phone over 3G network, it is no ...
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0answers
283 views

Can I get UDP Hole Punching with (any) VNC client to get around the local firewall/router?

I don't have access to the local internet router, so I'm unable to setup port forwarding on my lan connection. I'm just trying to find out if there is any way for me to get around my local router ...
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1answer
2k views

How to append netsh firewall rules, not just replace

I am using a script to set firewall rules in netsh. netsh.exe advfirewall firewall set rule name="Block External IP's" new remoteip="$($ipArray[0])" I thought that set was used so that it would ...
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1answer
742 views

Deny ping response in ipv6

I would like to know how to deny ping replies on my ipv6 address. We have been messing around with ping flooding on ipv6 at work, and the usual way to block icmp requests does not work. I have tried ...
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7answers
105k views

How to bypass web URL filtering service to access blocked websites (proxy)

I'm using network, where services such as Gmail or any other e-mails, Google Drive, Dropbox, all social networks are blocked. Basically my goal is to access simply GMail, but I couldn't find any way ...
2
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3answers
246 views

A tool which can in single click block all apps from using internet?

I will bring my laptop to my vacations and connect to the net via my mobile phone. the mobile transfer limit is limited to 200MB and I do not want to deplete it in one day. I basically want that I ...
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1answer
3k views

Windows firewall blocks outbound connection that is allowed by a rule

I have configured Windows Firewall to block all outbound connections. I have then created "allow" rules to enable certains applications to create outbound connections. Unfortunately it seems that some ...
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1answer
1k views

How to use SSL tunnelling to give full internet access to some applications while you are on a restrictive corporate network?

How to use SSL tunnelling to give full internet access to some applications while you are on a restrictive corporate network? Use cases: you want to be able to access some restricted destinations ...
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1answer
138 views

Allowing only certain IP Addresses [closed]

How would I allow only certain IP addresses to connect to me for Xbox Live? I did block all inbound rules and then added a custom rule to allow only certain IPs to connect to me, but some other people ...
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1answer
460 views

Why does the Finder.app accept incoming network connections?

When looking at my OSX firewall settings, I see that the finder.app application is set to accept incoming network connections. How come that's set to true by default?
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2answers
559 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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1answer
826 views

Opening firewall to incoming port 443

I recently set up the ufw firewall on a Linux machine so that outgoing connections are allowed, incoming connections are denied, and denied connections are logged. This seems to work fine for most ...
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4answers
8k views

iptables: Allow only HTTP access for web browsing

Have a linux box, want it locked down but just be able to surf internet on it. Why is this script blocking http too? #!/bin/sh # # iptables -F # #Set default policies for INPUT, FORWARD and OUTPUT ...
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2answers
711 views

Running a webserver behind a firewall I have no access to

I'm having a bad time in my student appartment: I want to run a webserver on my Laptop, which should be reachable from outside of the net. I'm sitting behind some proxy-server that passes outgoing ...
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1answer
479 views

Can telnet port 25 while at home, but not while in internal network

I can telnet port 25 on mail.foo.com while I am at home. But I can't telnet to port 25 on mail.foo.com while I am on the internal network where the mail server is located. This also applies for other ...
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0answers
54 views

Windows Firewall Error 1060, Unable To Start [duplicate]

Possible Duplicate: How to restore Windows Firewall after some malware deleted its service? I recently got a virus (not sure which one) that disabled both my Windows Firewall and Windows ...
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0answers
794 views

Lync client 2010 and VPN firewall rule

I am running Lync client 2010 (4.0.7577.4598) on Windows 7 x64. The server for this is a corporate one, and in parallel I use a Juniper VPN to access the corporate intranet and other resources. ...
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0answers
143 views

Opening a specific port on Mac

I need to open a specific port on my mac client (because when I try to connect from server it says "target machine actively refused it ").My problem though is I cannot find a way to add a specific ...
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2answers
2k views

What means empty iptables?

I'm using CentOS and when type the command: iptables -L -v The output is as follows: Chain INPUT (policy ACCEPT 19614 packets, 2312K bytes) pkts bytes target prot opt in out ...
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0answers
175 views

Soluto installation fails with “Check your internet connection or firewall settings”

A few days ago, I wanted to install Soluto. The installation failed with this error message: Check your internet connection or firewall settings! Because everything was fine with my connection, ...
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4answers
9k 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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1answer
674 views

Creating a DMZ with two routers

Hopefully it's okay to post semi-"I am learning" questions on this forum! Basically, I have two routers (both Netgear D834G's) and would like to setup a DMZ at home (merely for learning purposes and ...
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1answer
300 views

How to set address lange limit on inbound firewall rule on Netgear DG834GU

In the firewall settings on a Netgear DG834GU modem/router I am trying to create an inbound rule that allows SMTP traffic (port 25) only from an address range (only allow mail from Postini anti-spam ...
4
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3answers
189 views

What security changes are necessary when connecting DSL modem directly to PC instead of router?

Windows XP I have a user with a single PC that was connected to the internet via a standard home router. The router is now having hardware-related issues and to save money, they're considering ...
0
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1answer
77 views

FlashFXP asking to connect to unknown remote address

I installed Agnitum Outpost firewall which tells me about every connection happening on every port. When I try to connect to my FTP server on port 21 (hosted on mediatemple.com), I get an outgoing ...
2
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1answer
4k views

Deny all incoming connections with iptables?

I want to make some simple iptables rules to deny all incoming connections and allow outgoing. How can I do that?
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1answer
2k views

Which port must I unblock in firewall for FTPS using WinScp to evade Timeout?

I'm suing FTPS in WinScp for sending data to my Synology diskstation. When I'm doing it inside a private network using port 21 for connection everything works fine. But when I'm trying the same thing ...
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2answers
1k 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 ...