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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9
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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 ...
0
votes
0answers
36 views

I want to allow a specific port but still keep my firewall active. OS X 10.8

I have tried this from a previous post: The builtin firewall used by OS X is ipfw. To learn more about it from the Terminal you can enter man ipfw. To create a new firewall rule to allow incoming ...
1
vote
1answer
35 views

How can I use wifi only for handoff?

Ok OSX wizards... I have a dilemma. In order to use handoff/continuity at work I need to connect my Mac and iPad/iPhone to the same wifi network. Moreover, I also need to be connected to the ...
0
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0answers
51 views

Little Snitch reports outgoing connections from Mach Kernel — am I infected?

I monitor all my traffic using Little Snitch. Recently, I've noticed strange IP addresses making connections to the "mach_kernel" process. Most of these IP addresses seem to originate from other ...
1
vote
1answer
564 views

ntpd and incoming connections on OS X client?

I recently received a dialog box on my MacBook Air (10.9.2 Client) asking "Do you want the application “ntpd” to accept incoming network connections?". I have OS X's firewall enabled. Now, my ...
1
vote
1answer
38 views

In OS X, how does manually sandboxing an application from the internet compare to blocking it with Little Snitch?

I want to prevent inbound and outbound connections to one application. I can buy Little Snitch if it's the best option, but it feels like I wouldn't be getting much value out of it for that one use. ...
1
vote
3answers
670 views

Apple Remote Desktop Admin blocked by OS X Yosemite Firewall

I'm experiencing an issue where the Firewall in OS X Yosemite is repeatedly preventing me from launching ARD Admin. Symptoms: Launch ARD and no window appears. I am forced to force-quit the ...
3
votes
1answer
1k views

How can I enable DVD or CD Sharing with the Firewall on?

I'm trying to enable "DVD or CD Sharing" in the System Preferences. When I enable it, it says that the Firewall is blocking it. If I go into the Security > Firewall settings, I see that the first item ...
9
votes
3answers
4k views

Why does Microsoft Word need to allow incoming network connections?

When I turn on the Mac firewall I get prompted to allow the MS office apps (Word, Excel, Powerpoint) to accept incoming connections. Why is this, and is it safe to allow it ? I'm running Mac OS ...
1
vote
2answers
661 views

No Jailbreak Firewall for iOS (iPhone) for iOS 7

Is there a non jailbreak firewall for the iPhone or is there some way to set one up, somehow?
0
votes
0answers
138 views

Bandwidth throttling with onboard tools in Yosemite?

Is there any way with Mac OS Yosemite's built-in firewall to throttle or queue connections from a single application, on a single port or to a certain hostname? The App in question would be the ...
5
votes
1answer
2k views

Dropbox109 process asking to access firewall on Yosemite

As the title says, I have a process called Dropbox109 asking to access the internet. I have denied it. I have Dropbox installed since Mavericks, and its been working fine (uploads/downloads/sync). ...
1
vote
1answer
50 views

What's netbiosd? I must block netbiosd?

I was asked to block netbiosd, but do not know what is. I must to block all connections from netbiosd?
0
votes
1answer
1k views

Migration Assistant fails on FireWire Mavericks-to-Mavericks migration

I have the following setup and am attempting the use Migration Assistant over FireWire: Source machine: Early 2009 24-inch iMac running OS X 10.9 Destination machine: Latest MacBook Pro Retina ...
2
votes
0answers
24 views

Do pre-built Little Snitch configurations exist and are they shared?

Is it possible to import configurations that have been created elsewhere into Little Snitch? For example, a ready to go basic ruleset for someone who wants to block iCloud's more intrusive features. ...
26
votes
4answers
15k views

How to get rid of firewall “accept incoming connections” dialog?

I've accepted this so many times that firewall should already remember it. For example, I get it for Eclipse when starting my java programs in debugging mode ... sometimes this dialog is displayed ...
0
votes
1answer
21 views

Is there a way to do per-application rules in pfctl/alf?

I'd like to implement a mitmproxy for a single application on my mac. Pfctl doesn't natively have (from what I can see) support to set rules based on the application source/dest of the packets, but ...
0
votes
2answers
868 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 ...
0
votes
2answers
76 views

Mavericks firewall does not keep my choices

I'm on Mavericks and I run a python script to have a minimalist local server. Anytime I launch the server the firewall popup comes in and asks me "Do you want the application “python2.7” to accept ...
1
vote
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 ...
0
votes
1answer
138 views

Rdr Missing on Yosemite

I'm trying to add a rule to my computer which was working on my work computer. strangely enough there's no rdr program on my Yosemite. should I install a particular package to obtain it? sh-3.2# rdr ...
0
votes
0answers
135 views

Forwarding IP address on Yosemite

I've been trying to redirect ip address 1.2.3.4 to 5.6.7.8 using IceFloor and PF rules. I have tried the following: rdr from any to 1.2.3.4 -> 5.6.7.8 This does not make a difference and ...
0
votes
1answer
170 views

Yosemite Server, adaptive firewall not stopping screensharingd attempts?

I'm not certain if the adaptive firewall in Yosemite Server 4.0 is just not working or just not working for screensharingd. I have a mac mini server in a colo and get lots of attempts at ...
8
votes
3answers
27k views

How to restrict “Remote Login” (ssh) access to only certain IP ranges?

Can someone please tell me how to restrict SSH access only to certain IP ranges (e.g. local network) and not the whole Internet? I guess this has to be done via firewall.
0
votes
1answer
260 views

Cant access firewall in system preferences; firewall tab is greyed out

I have tried multiple things to rememdy this issue. I have tried enabling and logging in as root, tried to clone the system preferences app and accessing security and privacy from the view menu and ...
1
vote
1answer
21 views

Firewall rules ambiguous?

In the stock OSX firewall settings I can add applications to the rules table, and then give them a red dot (block) or a green dot (allow). I've got 6 apps in the table. Some green some red. But what ...
0
votes
1answer
187 views

Firewall: Add command-line tool to rules (mosh-server)

How can I add a command line tool I've installed manually to the system firewall? The tool is Mobile Shell (mosh) installed via the excellent Homebrew)? Specifically, I want to add a rule for ...
0
votes
1answer
140 views

CrashPlan requests network connection on startup

Since upgrading to Mavericks, CrashPlan requests incoming network connections each time my MBP is restarted. I always click "Allow" and I've ensured that my firewall settings allow it, but I still get ...
0
votes
0answers
47 views

SelfControl not blocking anything

I have used SelfControl to block the internet for some time, but now it won't block anything anymore. (Edit: Well, acutally one moment SelfControl blocks some sites, then allows them again, apparently ...
2
votes
1answer
286 views

Disable Little Snitch in Guest account

It seems that Little Snitch 3.4.1 is a rehaul of the old version and this solution to disabling it in the guest account posted here Disable Little Snitch in guest account? doesn't work anymore. When ...
4
votes
1answer
100 views

ShellShock: Do I need to be worried about this on OS X Mavericks?

The title kind of says it all… I was in the process of bringing up a rather extensive set of Mac OS X Server machines when ShellShocked hit the world. As soon as I saw the news, I hastily began ...
0
votes
0answers
18 views

Firewall overwrite with wrong install version - How to fix

Hello. Not sure if this is an appropriate question here: Problem: Partially inaccessible computer. Due to firewall software overwrite (?) Need-Intent: Restore the machine condition & data. ...
1
vote
1answer
433 views

How can I add a ipfw forward rule to little snitch?

I use the following rules to connect to my nginx server on a vagrant machine: sudo ipfw add 100 fwd 127.0.0.1,8080 tcp from any to me 80 sudo ipfw add 100 fwd 127.0.0.1,8090 tcp from any to me 443 ...
3
votes
1answer
783 views

How can I restrict Mac sharing services to a specific network/adapter?

I want is to set up a Mac to connect to multiple networks. So far, so good. However, I only want to grant AFP access to users on ONE of the networks, but not the other. How can I accomplish this on ...
1
vote
1answer
415 views

How can I tell Firewall to allow incoming connections for Python.app running Django

Each time I run my Django development server, I get a dialog to allow incoming connections. No matter what I do : Click Allow in the dialog box Add to the Firewall via the OS X GUI (both real and ...
0
votes
0answers
157 views

Opening Firewall ports on Mac OS X 10.9

I am attempting to open only a defined Firewall port on Mac OS X 10.9, for istance 1000 TCP. I know that Mac OS provides two different types of firewall: ALP and PF/IPFW. ALP allows only to control ...
1
vote
2answers
2k views

How to open a specific port in Firewall OS X 10.9.4

How do I open a specific port in the firewall? I can not use the "allow connections from application" as I want to open the port for Jenkins, that is not on the list...
0
votes
0answers
37 views

How to use macports with intego netbarrier installed?

Re: Mac OX 10.9.4 (and previous mavericks); intego X8 netbarrier; macports 2.3.1 I need help getting Intego's X8 netbarrier firewall software working with macports. Many, but not all, macports fail ...
0
votes
0answers
22 views

Why doesn't Apache show up under Firewall (System Preferences » Security)?

Why doesn't Apache show up under Firewall settings, and are there other programs that aren't showing up here? (outside of those that are inclusive of "basic internet services", e.g. DHCP, Bonjour, ...
0
votes
0answers
100 views

Is there a way to stop OS X opening NAT-PNP/uPNP holes for every open port on *?

With any luck, there's an easy work-around for this: curl ifconfig.me to find your external IP address sudo lsof -i4 -n | grep LISTEN | grep \* to find processes listening for connections from other ...
0
votes
0answers
141 views

pfctl rules to only allow OpenVPN connection?

I'm trying to lock down my internet connection for privacy reasons and have signed up with a VPN provider who does no filtering (quite opposite to my ISP). The VPN provider supports OpenVPN via UDP on ...
1
vote
1answer
140 views

Modify existing Little Snitch rule to be Effective in all profiles

I've been using Little Snitch for a while. I have several profiles set up (e.g. Home, Work, Public, etc). I've been working to generalize some of the rules. E.g. Instead of specifically allowing ...
1
vote
0answers
119 views

Open port 8888 for HTTP traffic from local network

I have my OS X 10.9.3 Application Level Firewall turned on (Firewall: On in System Preferences | Security & Privacy with Firewall Options: Block all incoming connections). ipfw show lists a ...
0
votes
0answers
119 views

Set DSCP/TOS IPv4 header for certain packets

I'm trying to set the value of the DSCP/TOS field for certain outgoing packets (for example all ACK packets) for all applications. I've looked through the pfctl/pfconf.org and ipfw docs/manpages but ...
2
votes
1answer
395 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 ...
6
votes
1answer
8k views

Migration Assistant fails on Ethernet Mavericks-to-Mavericks migration

I have the following setup and am attempting the use Migration Assistant over Ethernet: Source machine: Early 2009 24-inch iMac running OS X 10.9 Destination machine: Latest MacBook Pro Retina ...
1
vote
1answer
811 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 ...
1
vote
1answer
492 views

packet forwarding on OSX mavericks

My MacBookAir(Mavericks 10.9.2) need to share my internet connection(wi-fi;en0) with BeagleBoneBlack(BBB) which are in 192.168.7.0 subnet over en6 interface. ifconfig $ ifconfig lo0: ...
1
vote
1answer
1k views

OSX Firewall: Forwarding Ports & Ignoring Non-Local Requests

On my production Debian server I use this to forward requests that come in to port 80 to a non-root process running on port 8080: sudo iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 80 -j ...
3
votes
2answers
467 views

How to block internet access of all apps (except browser) when using 3g usb modem?

Is there any app that helps me to block all apps for accessing the internet when using 3g modem?