Firewall is software that’s there to protect you so it’s best to keep it turned on. With Firewall running, your Mac takes care of everything — automatically determining whether or not an application is allowed to send or receive traffic from the network. It does this using Code Signing Certificates that are issued to trusted applications. Without the proper certification, an app isn’t allowed through. Think of it like a bouncer on the door of a club — if an app doesn’t have the proper ID it ain’t coming in.
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There may be times where Firewall isn't needed, though. Say, for example, you’re playing a video game and don’t want to access the online multiplayer modes. Or antivirus software that you’ve installed is conflicting with Mac’s Firewall application.
Turning off Firewall solves these problems. But you should be aware that, while switching off Firewall can stop apps on your computer from sending traffic to the network, it provides free reign for incoming connections, leaving you vulnerable to malware and hackers.
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Clean your Mac before changing settings
Before we show you how to turn Firewall on and off, it’s recommended that you have a cleanup of apps on your system, particularly those that you’ve previously deleted. If you’ve ever downloaded an app by mistake and uninstalled it or found an app to be malicious and sent it to the Trash, there’s every chance that their remnants still exist on your system.
If that’s the case and you have Firewall switched off, these apps will be able to send and receive traffic, putting your Mac at serious risk.
So, if you plan on playing around with the Firewall settings, use a tool like CleanMyMac X to find and remove any unwanted files that exist on your system. CleanMyMac scans all of your disks and compiles installed apps. It also identifies broken and outdated apps so that you can easily remove them.
Here’s how to use it:
- Download and launch CleanMyMac X. (Free download)
- Click on the Uninstaller tab.
- Click on View All Applications and select any apps that you wish to remove from the list. Apps can be sorted by Name, Size, Selection, and Last Launch Date to help your search.
- Click on Complete Uninstallation from the dropdown menu.
- Click on the Uninstall button and enter your admin password when prompted.
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Selected apps will now be completely removed from your system.
Okay, with that out of the way, let’s get into enabling and disabling Firewall.
How to turn on Firewall on Mac
Mac’s Firewall settings can be found in the Security and Privacy preference in System Preferences.
To enable Firewall in macOS and OS X v10.6 or later:
- Go to System Preferences > Security & Privacy.
- Click on the Firewall tab.
- Click on the lock icon in the bottom left corner of the window and enter your administrator password.
- Click Turn On Firewall (or Start in OS X).
In v10.5 of OS X, Firewall is enabled slightly differently:
- Go to System Preferences > Security.
- Click on the Firewall tab.
- Click on the lock icon in the bottom left corner of the window and enter your administrator password.
- Click Start.
How to disable Firewall for Mac
Turning off the Firewall is simply a case of following the same instructions as above and clicking on the Turn Off Firewall button.
To do this, you may need to enter your administrator password.
Firewall advanced settings
By clicking on the Firewall Options button (or Advanced for OS X) you’ll find additional settings that give you more control over how the Firewall performs.
In the list, you’ll see all of the apps that are currently allowed to send and receive network traffic. By clicking on the application to highlight it and hitting the '-' button, you can remove an app from the list. Alternatively, clicking on the '+' button lets you add a new app to the list.
You’ll also be presented with three options:
Block all incoming connections — this blocks all connections other than those required for basic internet services.
Automatically allow signed software to receive incoming connections — this automatically allows software signed with a valid certificate to gain access to the network for sending and receiving traffic.
Enable stealth mode — this prevents Mac from responding to probing requests.
Check the boxes for any settings you'd like to enable and hit OK to confirm.
The great thing about Firewall for Mac is that it takes care of everything for you, regulating the access of apps to the network to keep your system safe from malicious activity. As said, it’s best to keep Firewall turned on and let it does its thing. But if you do plan on turning it off, even just for a short time, run CleanMyMac X prior to doing so to rid your Mac of old apps lurking in the depths of your system.
The following tables compare general and technical information for notable computer clustersoftware. This software can be grossly separated in four categories: Job scheduler, nodes management, nodes installation and integrated stack (all the above).
General information[edit]
Software | Maintainer | Category | Development status | ArchitectureOCS | High-Performance/ High-Throughput Computing | License | Platforms supported | Cost | Paid support available |
---|---|---|---|---|---|---|---|---|---|
Accelerator | Altair | Job Scheduler | actively developed | Master/worker distributed | HPC/HTC | Proprietary | Linux, Windows | Cost | Yes |
Amoeba | No active development | MIT | |||||||
Base One Foundation Component Library | Proprietary | ||||||||
DIET | INRIA, SysFera, Open Source | All in one | GridRPC, SPMD, Hierarchical and distributed architecture, CORBA | HTC/HPC | CeCILL | Unix-like, Mac OS X, AIX | Free | ||
Enduro/X | Mavimax, Ltd. | Job/Data Scheduler | actively developed | SOA Grid | HTC/HPC/HA | GPLv2 or Commercial | Linux, FreeBSD, MacOS, Solaris, AIX | Free / Cost | Yes |
Ganglia | Monitoring | actively developed | BSD | Unix, Linux, Windows NT/XP/2000/2003/2008, FreeBSD, NetBSD, OpenBSD, DragonflyBSD, Mac OS X, Solaris, AIX, IRIX, Tru64, HPUX. | Free | ||||
Globus Toolkit | Globus Alliance, Argonne National Laboratory | Job/Data Scheduler | actively developed | SOA Grid | Linux | Free | |||
Grid MP | Univa (formerly United Devices) | Job Scheduler | no active development | Distributed master/worker | HTC/HPC | Proprietary | Windows, Linux, Mac OS X, Solaris | Cost | |
Apache Mesos | Apache | actively developed | Apache license v2.0 | Linux | Free | Yes | |||
Moab Cluster Suite | Adaptive Computing | Job Scheduler | actively developed | HPC | Proprietary | Linux, Mac OS X, Windows, AIX, OSF/Tru-64, Solaris, HP-UX, IRIX, FreeBSD & other UNIX platforms | Cost | Yes | |
NetworkComputer | Runtime Design Automation | actively developed | HTC/HPC | Proprietary | Unix-like, Windows | Cost | |||
OpenHPC | OpenHPC project | all in one | actively developed | HPC | Linux (CentOS) | Free | No | ||
OpenLava | Teraproc | Job Scheduler | actively developed | Master/Worker, multiple admin/submit nodes | HTC/HPC | GPL | Linux | Free | Yes |
PBS Pro | Altair | Job Scheduler | actively developed | Master/worker distributed with fail-over | HPC/HTC | AGPL or Proprietary | Linux, Windows | Free or Cost | Yes |
Proxmox Virtual Environment | Proxmox Server Solutions | Complete | actively developed | Open-source AGPLv3 | Linux, Windows, other operating systems are known to work and are community supported | Free | Yes | ||
Rocks Cluster Distribution | Open Source/NSF grant | All in one | actively developed | HTC/HPC | OpenSource | CentOS | Free | ||
Popular Power | |||||||||
ProActive | INRIA, ActiveEon, Open Source | All in one | actively developed | Master/Worker, SPMD, Distributed Component Model, Skeletons | HTC/HPC | GPL | Unix-like, Windows, Mac OS X | Free | |
RPyC | Tomer Filiba | actively developed | MIT License | *nix/Windows | Free | ||||
SLURM | SchedMD | Job Scheduler | actively developed | HPC/HTC | GPL | Linux/*nix | Free | Yes | |
Spectrum LSF | IBM | Job Scheduler | actively developed | Master node with failover/exec clients, multiple admin/submit nodes, Suite addOns | HPC/HTC | Proprietary | Unix, Linux, Windows | Cost and Academic - model - Academic, Express, Standard, Advanced and Suites | Yes |
Oracle Grid Engine (Sun Grid Engine, SGE) | Univa | Job Scheduler | active Development moved to Univa Grid Engine | Master node/exec clients, multiple admin/submit nodes | HPC/HTC | Proprietary | *nix/Windows | Cost | |
SynfiniWay | Fujitsu | actively developed | HPC/HTC | ? | Unix, Linux, Windows | Cost | |||
TORQUE Resource Manager | Adaptive Computing | Job Scheduler | actively developed | Proprietary | Linux, *nix | Cost | Yes | ||
UniCluster | Univa | All in One | Functionality and development moved to UniCloud (see above) | Free | Yes | ||||
UNICORE | |||||||||
Univa Grid Engine | Univa | Job Scheduler | actively developed | Master node/exec clients, multiple admin/submit nodes | HPC/HTC | Proprietary | *nix/Windows | Cost | |
Xgrid | Apple Computer | ||||||||
Software | Maintainer | Category | Development status | Architecture | High-Performance/ High-Throughput Computing | License | Platforms supported | Cost | Paid support available |
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Table explanation
- Software: The name of the application that is described
Technical information[edit]
Software | Implementation Language | Authentication | Encryption | Integrity | Global File System | Global File System + Kerberos | Heterogeneous/ Homogeneous exec node | Jobs priority | Group priority | Queue type | SMP aware | Max exec node | Max job submitted | CPU scavenging | Parallel job | Job checkpointing |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Enduro/X | C/C++ | OS Authentication | GPG, AES-128, SHA1 | None | Any cluster Posix FS (gfs, gpfs, ocfs, etc.) | Any cluster Posix FS (gfs, gpfs, ocfs, etc.) | Heterogeneous | OS Nice level | OS Nice level | SOA Queues, FIFO | Yes | OS Limits | OS Limits | Yes | Yes | No |
HTCondor | C++ | GSI, SSL, Kerberos, Password, File System, Remote File System, Windows, Claim To Be, Anonymous | None, Triple DES, BLOWFISH | None, MD5 | None, NFS, AFS | Not official, hack with ACL and NFS4 | Heterogeneous | Yes | Yes | Fair-share with some programmability | basic (hard separation into different node) | tested ~10000? | tested ~100000? | Yes | MPI, OpenMP, PVM | Yes |
PBS Pro | C/Python | OS Authentication, Munge | Any, e.g., NFS, Lustre, GPFS, AFS | Limited availability | Heterogeneous | Yes | Yes | Fully configurable | Yes | tested ~50,000 | Millions | Yes | MPI, OpenMP | Yes | ||
OpenLava | C/C++ | OS authentication | None | NFS | Heterogeneous Linux | Yes | Yes | Configurable | Yes | Yes, supports preemption based on priority | Yes | Yes | ||||
Slurm | C | Munge, None, Kerberos | Heterogeneous | Yes | Yes | Multifactor Fair-share | yes | tested 120k | tested 100k | No | Yes | Yes | ||||
Spectrum LSF | C/C++ | Multiple - OS Authentication/Kerberos | Optional | Optional | Any - GPFS/Spectrum Scale, NFS, SMB | Any - GPFS/Spectrum Scale, NFS, SMB | Heterogeneous - HW and OS agnostic (AIX, Linux or Windows) | Policy based - no queue to computenode binding | Policy based - no queue to computegroup binding | Batch, interactive, checkpointing, parallel and combinations | yes and GPU aware (GPU License free) | > 9.000 compute hots | > 4 mio jobs a day | Yes, supports preemption based on priority, supports checkpointing/resume | Yes, fx parallel submissions for job collaboration over fx MPI | Yes, with support for user, kernel or library level checkpointing environments |
Torque | C | SSH, munge | None, any | Heterogeneous | Yes | Yes | Programmable | Yes | tested | tested | Yes | Yes | Yes | |||
Univa Grid Engine | C | OS Authentication/Kerberos/Oauth2 | Certificate Based | Integrity | Arbitrary, e.g. NFS, Lustre, HDFS, AFS | AFS | Fully heterogeneous | Yes; automatically policy controlled (e.g. fair-share, deadline, resource dependent) or manual | Yes; can be dependent on user groups as well as projects and is governed by policies | Batch, interactive, checkpointing, parallel and combinations | Yes, with core binding, GPU and Intel Xeon Phi support | commercial deployments with many tens of thousands hosts | >300K tested in commercial deployments | Yes; can suspend job on interactive usage | Yes, with support of arbitrary parallel environments such as OpenMPI, MPICH 1/2, MVAPICH 1/2, LAM, etc. | Yes, with support for user, kernel or library level checkpointing environments |
Software | Implementation Language | Authentication | Encryption | Integrity | Global File System | Global File System + Kerberos | Heterogeneous/ Homogeneous exec node | Jobs priority | Group priority | Queue type | SMP aware | Max exec node | Max job submitted | CPU scavenging | Parallel job | Job checkpointing |
Table Explanation
- Software: The name of the application that is described
- SMP aware:
- basic: hard split into multiple virtual host
- basic+: hard split into multiple virtual host with some minimal/incomplete communication between virtual host on the same computer
- dynamic: split the resource of the computer (CPU/Ram) on demand