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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Which incoming ports do you need to open in osx firewall?

I use pf (BSD packet filter via Terminal). The recommended use of pf is to block all incoming ports and then open those you need. I want my system to work properly and don't miss things like ...
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3answers
1k 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 ...
2
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0answers
25 views

How to limit the bandwidth on a per-application (or per-process) basis in OS X Yosemite?

Whenever I use Homebrew or Apple Store to download a large application, it sucks all my available bandwidth and I am then unable to browse the web. How can limit the bandwidth per-application or ...
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23 views

Mac Terminal won't accept £ in ssh password?

I have an issue where I'm trying to ssh into the root account of a firewall from my Mac. I'm on the same network as the firewall. ssh root@1.2.3.4 I'm then asked for my password which contains the ...
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40 views

Firewall asks always on start if incoming connections should be allowed for one daemon

I am using Yosemite on a MacBook Pro Retina. I have a global deaemon defined to start squezelite. <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST ...
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123 views

Cannot connect to SSH server from Mac OSX

Whenever I try to connect to a remote server using SSH, I get an error "ssh: connect to host x.x.x.x port 22: Connection refused" I didn't install a Firewall or something similar. I know for sure the ...
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2answers
345 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 ...
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107 views

Does iOS Personal Hotspot have a firewall? Port 5353 not working

I have an iPhone 5 with iOS 8 installed. I've connected two devices to the Personal Hotspot, my Macbook Air and an Arduino Yun. Both can connect to the internet through the hotspot fine. I can also ...
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1answer
233 views

Is there a way to permanently “Deny” an application incoming network connections (i.e. no more prompts)?

There's a few apps that keep prompting me for incoming network connections, which I prefer to deny, but whenever I open these programs, I'm re-prompted to Allow/Deny incoming network connections for ...
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2answers
559 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 ...
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2answers
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 ...
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0answers
2k 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 ...
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5answers
19k 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 ...
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1answer
64 views

Configuring OS X Firewall to enable SSH/SCP only on the local subnet? [duplicate]

We would like to configure OS X to only allow Remote File Sharing (SCP) from a specific range of internal IP addresses. That way they only accessible when the user is connected via the VPN. What's ...
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93 views

Firewall partly breaks internet sharing over WiFi after upgrading to Yosemite

I used to share my ADSL/Ethernet internet connection over WiFi from a iMac to my iPhone/iPod/MacBook, but after upgrading to Yosemite (10.10) sharing stopped working with a very puzzling behaviour: ...
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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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0answers
71 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 ...
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1answer
68 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 ...
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128 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 ...
2
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1answer
735 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 ...
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1answer
54 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. ...
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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 ...
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2answers
726 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?
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0answers
206 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 ...
7
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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). ...
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1answer
87 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?
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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
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0answers
32 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. ...
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1answer
29 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 ...
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2answers
927 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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2answers
117 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 ...
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2answers
3k 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
205 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 ...
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151 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
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1answer
215 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 ...
10
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3answers
29k 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.
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1answer
351 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
22 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
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1answer
233 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
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1answer
151 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 ...
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0answers
55 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 ...
4
votes
1answer
102 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 ...
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20 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. ...
2
votes
1answer
652 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
800 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 ...
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211 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 ...
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2answers
3k 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...
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43 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 ...
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0answers
24 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, ...
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134 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 ...