Typically software that runs to prevent network traffic from reaching a computer. Also a hardware device that works on a network level rather than running on a single computer.

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Prevent data on unsecured wireless, until VPN is connected [duplicate]

There's a lot of good advice around about avoiding connecting to unsecured wireless networks, and using a VPN (for all traffic) if you absolutely must use one. What seems to be missing from this ...
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3answers
349 views

Open ports. Safe?

My friend is currently running the default firewall with "Block all incoming connection" (except the basic ones like 80). I just scanned his mac for open ports and I found the following: Open TCP ...
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1answer
269 views

Block access from WAN but not from LAN

I have an OSX Lion box behind a router (firewall on in the router). On the OS X, if I switch the firewall on, I'm unable to access the web server running on this box from outside the network (i.e. ...
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1answer
151 views

How to isolate apps from the internet?

Can I completely isolate apps on mac from the internet, without installing any additional software ? I need a sort of firewall to isolate them thanks
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1answer
91 views

Sharing screen with Messages.app on Mountain Lion

Both computers are running OS X 10.8.4 When trying to initiate the screen sharing feature, the other computer gets the request, then clicks "Accept" but thats as far as we get. Then we see this: I ...
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338 views

What app is this ScannerEventWatcher.app?

After enabling the Firewall, I got this message: Do you want the application “ScannerEventWatcher.app” to accept incoming network connections? Clicking Deny may limit the application’s ...
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2answers
838 views

Is it possible to block a specific IP from attempting to connect to screen sharing?

I have noticed for some time that the shared screen icon flickers on and off on my menubar every couple of minutes (MacBook Pro, MAC OS X 10.8.4). I thought it was a glitch or a bug. I've checked the ...
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1answer
732 views

How to configure client OS X VPN (L2TP) connection so you do not loose access to intranet?

I am looking for a solution for configuring the VPN on OS X so you do not loose access to internal network. In fact I want to use the VPN only to enable access to different external services that ...
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1answer
332 views

How can I disable any external traffic to my port 80?

I don't want others on the same network (or any network!) to be able to access my machine at port 80, where I have dev websites. I've tried adding this rule to ipfw: deny tcp from any to any ...
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1answer
106 views

How can I permanently suppress the firewall access prompt while developing a server program

I have a server process that I am developing that opens listening TCP sockets. Each time that happens, the firewall opens a dialog with the text "Do you want the application “server” to accept ...
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2answers
2k views

Firewall with application rules for iPad

I've read some other topics about not needed firewall for iPad's, but I'm searching the other way of security or (more important) to help my budget. I need firewall that has incoming/outcoming rules ...
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1answer
109 views

Why can't I remove this top entry in the firewall options?

I go into the System Preferences, Firewall, then Firewall Options. I can't select the "File Sharing (FTP)" entry to remove it. How can I? Update: I'm running OS X 10.7.5, and nothing is enabled in ...
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29 views

Enforcing firewall (native or 3rd-party)

We're currently doing PCI compliance, and one of the requirements is that mobile devices that have access to systems involved in processing card data have personal firewall software installed which ...
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274 views

Can someone help me with errors in my pf.conf file? OS 10.7

I keep getting errors about the order of my rules and that there are syntax errors in my pf.conf file, and after troubleshooting for days, I thought I'd ask for some help. Please take a look and let ...
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2answers
96 views

Application asks to allow incoming communications but is already allowed in firewall preferences

One of my login items is called FontAgent Activator.app Each time I restart, I am prompted to accept incoming network communications for this app. However the app is already listed as allow incoming ...
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1answer
196 views

Firewall window pops up then vanishes

For about the last month, I've had the Firewall Accept/Deny incoming connection window pop up at semi-regular intervals. I have not, however, been able to identify the cause. Taking a look at the ...
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0answers
2k views

FTP: active vs. passive, command line vs. browser

Here's a weird one for everyone. I'll use AskDifferent because my test bed is on a Mac, but I don't know that the underlying issue is specifically Mac. My Mac is behind a NAT wall. Let's call my ...
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3answers
9k views

Firewall settings with “imagent”

Among others that I recognize, I have the "imagent" been allowed to pass true my firewall (allow incoming connection). What/who is it, and do I must have it or can I just block it. I do not ...
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1answer
14k views

Firewall for outgoing connections

Is there a firewall for OSX Lion, that allows controlling of outgoing connections? The built in firewall handles only incoming connections, apparently.
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3answers
1k views

Firewall on iPhone/iOS (ipfw or pf)

I want to run ipfw or pf on my iPhone -- or the equivalent. Seems simple, but I can't find anything that works. Device is jailbroken, looked very carefully through Cydia, and even through some of ...
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2answers
2k views

Disable Little Snitch in guest account?

It's annoying as hell to let others use your computer on a guest account with Little Snitch installed, all the consecutive popups one after another...it's really ridiculous. Also in the event my ...
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1answer
85 views

How can I disable the firewall on OS X after forgetting how I set it?

I have enabled an option on my mac to ask for permission every time I open an network application, But I can't seem to find out how to turn it off. Where would I disable the below dialog?
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1answer
29k views

Should I block incoming connections from “netbiosd”?

My (application) firewall settings are configured to block incoming connections from netbiosd. I don't recall setting this myself, and wonder what the consequences are. What are the consequences of ...
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2answers
2k views

Mac OS X Server ignores remote HTTP connections, but accepts local ones

I cannot get Mac OS X Server's web server to accept connections from other machines on the same LAN. This is on OS X 10.8.2, running on a Mac mini which originally shipped with Lion Server. I can ...
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1answer
288 views

Mountain Lion firewall is randomly delaying DNS requests

I recently experienced some delays during DNS host resolution on OS X 10.8. To test it I started a simple script which tries to repeatedly resolve the same hostname 20 times: #!/bin/sh for i in `seq ...
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1answer
389 views

Configure ipfw to filter by ip range

I am a Linux user and very new to OSX. I have an OSX 10.7.5 "Lion" server that I am configuring as a webserver. I only have shell access. I am tryin to configure the firewall, but ipfw is quite ...
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1answer
520 views

How can I exclude certain ports from the firewall notifications?

First of all, I know I can manually configure the firewall through IPFW but I hope that the OS X firewall system has an option for this by default. The problem I am currently having is that when I'm ...
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1answer
83 views

Firewall Being turned off

Is it possible for an application to close my OSX firewall? Several times I have opened the security pref and I find FireWall off while I do not remember turning it off. For antivirus I use ClamXav ...
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514 views

Macbook Pro 10.7.5 I have internet connection but can't open any page

I need some help. My internet was working fine and all of a sudden I am not able to open a web page. I went through some of the steps you recommended to other users, such as adding DNS 208.67.222.222 ...
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0answers
729 views

How to open port 8080 on external interface?

I am running a server on port 8080, which I can access fine as localhost:8080 or 127.0.0.1:8080. However, assuming my IP address is 192.168.1.15, how can I access the port using 192.168.1.15:8080? ...
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1answer
3k views

How to stop Windows firewall from blocking Bonjour hostname resolution

I have Bonjour installed on my Windows 7 PC, and the installer appears to have poked all the necessary holes in the Windows firewall. However, I can't ping windows-pc.local from my Mac. If I ...
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0answers
103 views

Ip blocked since I updated my Mac to Mountain Lion

Since I've upgraded my mac from lion to mountain lion, the ip 5.9.31.48 (api.shellycloud.com) appear to be down (ping said that "Host is down"). So I think that there is somewhere a firewall rule that ...
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3answers
5k views

How does one lock down OS X Server using the PF firewall?

Assume I have ip blocks for China, Russia, North Korea etc. How would I configure pf to allow those IP addresses to only access ports 80 and 443, and be denied access to other ports? I have an ...
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1answer
587 views

How can I turn off “iTunes incoming connection” warning?

I have enabled my firewall on Mac OS X Lion. And now every single time I open iTunes I get this warning:
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2answers
2k views

How does Application Level Firewall work?

I'm a bit confused about OS X Mountain Lion's Application Level Firewall. I have enabled ALF (Application Level Firewall) in Settings -> Secuity & Privacy -> Firewall and have some rules for some ...
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2answers
3k views

Enable ssh-key-only login to my Mac for 1 user

I have a Macbook Air that I would like to allow remote SSH access to without a password. I have created a user called remotepair that I have logged into and verified I can used the Mac with. I have ...
4
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1answer
6k views

Is ipfw available in Mountain Lion?

Is ipfw available in Mountain Lion? The reason for asking is that they introduced pf in Lion, but kept ipfw, however there is a chance that ipfw would eventually be removed. I found this: Can I use ...
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3answers
6k views

Network Access - SonicWALL VPN options

Does the built-in VPN client connect to SonicWALL?
3
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1answer
716 views

Little snitch and different network profiles

Is there any way to have different "little snitch" rules set for different networking profiles ? like for HOME one rule list for WORK another etc ...
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1answer
793 views

How to create OS X Server Admin firewall rules using ip address groups by command line?

The (Lion) Server Admin.app has a nice ability to apply firewall rules to ip address groups without having to edit ipfw config files. But having to enter large and long lists of IP addresses using ...
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1answer
2k views

How can I tell Firewall to allow incoming connections for Python running a specific script? (In this case: SickBeard)

I'm running SickBeard on my Lion installation, but I can't figure out how which Python version or script I should add to the Firewall rules allow connections from outside. In Console I get this ...
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1answer
673 views

How do I allow a single IP to access everything on my Mac?

I tried IceFloor, but it's not working to white list all traffic from a single IP to bypass firewalls.
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1answer
1k views

Firewall denies sshd-keygen-wrapper despite configuration

After upgrading to Lion, I cannot connect via SSH. I get a timeout: $ ssh -o ConnectTimeout=5 not.my.actual.hostname ssh: connect to host not.my.actual.hostname port 22: Operation timed out In ...
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0answers
2k views

How do I use pf/IceFloor to block an outgoing connection to an IP address?

I am running an application that regularly phones home and reports a little more information than I'm comfortable with. I would normally add the reporting server's hostname to /etc/hosts, but the app ...
4
votes
2answers
6k views

Do iOS 5.1 devices have a firewall?

Does iOS 5.1 support a built in firewall like Mac OS X does? Can't see anything about it in Settings.
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2answers
2k views

Can I block ports in Hotspot mode?

I would like to block ports when using my iPhone 4 (iOS 5.0 jailbreaked) as a hotspot. The reason is I don't want my backup program, computer updates or any high bandwidth usage tool to be able to ...
1
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1answer
286 views

How to stop being asked the same Firewall related question each time iTunes launches [duplicate]

Possible Duplicate: Always Asked to Configure Firewall for iTunes Every time I open iTunes (version 10.6) I'm asked "Do you want the application “iTunes.app” to accept incoming network ...
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votes
3answers
4k views

Is allowing port 80 on Little Snitch safe?

In Little Snitch, I allowed port 80 when a "google.com" popup appeared on my screen. I'm wondering if that was a good idea. If a hacker installed a program on my Mac, and that program sent ...
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2answers
2k views

“Accept incoming network connections” issue

Due to some graphic and/or code based changes, within programs like Dropbox, iTunes, jDownloader etc. (but mostly Java-based applications), the built-in firewall keeps asking for verification. ...
7
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4answers
3k views

How can I get the exact URLs/requests that a program is trying to connect to?

I currently use Little Snitch to control network traffic on my Macbook Pro, and see what my apps are connecting to. Unfortunately, Little Snitch only shows you the hostname that an app is connecting ...