How to check port is open or not on mac

The 0t0 is the offset within the file which is a socket being listened to so probably meaningless. Finally it is a TCP socket on the localhost interface port and it's being listened to by the GoogleDes process. While i haven't installed it on an OS X box yet, i have installed sshdfilter on my linux servers.

Essentially, it watches the secure log for sshd login attempts. That number is also configurable. You can find sshdfilter, if you are interested in hacking it apart, on freshmeat. I had high hopes for this as a general tool to see what daemons are running Am I missing a reason why these services are not showing up? Good point. And really, when not run as root this would be almost useless to find "trojans" Assuming that it was able to in the first place A completely SANE Canadian.

This is a great tool in general, but be very careful of trusting this on a hacked machine. A common technique of hackers is to replace programs like lsof, ps, top, etc. So if your machine has been hacked by all means use this to look around and see what happened, but don't trust it to indicate your machine has been cleaned. The only decently reliably way to clean up from a hack is to re-install the OS from scratch and then copy data over from a backup. If you restore the OS from a backup you don't have any way of knowing whether the backup was made before or after the hack for the same reasons mentioned above.

Other things that could be done to simply check for listeners which are not as drastic as a complete system reinstall would be: attempt to locate a program like lsof on the OS X install disk, if possible, by exploring the base install packages transfer the image from another OS X system that you know for sure isn't compromised Find the sources to the utility and compile it yourself Once you have a "known good" copy, you can run it to check out if anything is awry.

Authored by: kholburn on Apr 27, '07 AM That wouldn't work if the hacker has compromised libraries.

How to Scan Ports on an IP or Domain from Mac OS X

You would need a statically linked binary. What hackers might not do is replace "Activity Monitor" because unix hackers don't expect apple gui tools. None-the-less if you have been hacked you need to reinstall the OS. There is no real way around this. Also turn on your firewall and you might consider "Little Snitch".

Identifying ports in use on Mac and Windows Operating Systems – Extensis

What is this? It's a process whose name begins "SEC He" and has pid Use Activity monitor to find it. So my ignorant 'what are these' question is: What are these? Will be replaced by ldap in the future. Look this one up in activity monitor. Thanks for the tip. OK then, use the suggested command. Could that be a problem? On the contrary, this is a good thing. Some processes like mysqld drop their privileges after launchinf and acquiring a socket to listen on, running under an unprivileged "nobody" user ID.

How to Find an IP Address & Port Number : Internet & Mac Tutorials

So if the security of that process is compromised somehow, at least the attacker cannot easily exploit the elevated privileges of that process to do more damage. I use "Little Snitch" which handles all this for me. Authored by: craigw on Apr 28, '07 PM Just kidding. I put the two in a shell script like this:!

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That will remind me to run it with sudo, for more complete results. Simply by making a softlink from your script to a file named "-i", anyone can root you. Google it for details, but basically adding! Lost your password? Powered by the Parse. I had the recent unforunate occurence of having my machine hacked into. And no, it wasn't a security hole, but simply a really weak password that was compromised through a brute-force ssh attack. When a machine is compromised, you want to see what servers it may have installed, listening on your system.


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To do this, you need to "identify" all of the processes running servers. Normally you do this with fuser or netstat -nlp. Unfortunately, neither work on OS X. I finally figured out how to do this, and just wanted to post it online so others searching could find it. That's it! Show which processes are listening to which ports 31 comments Create New Account. The following comments are owned by whoever posted them. This site is not responsible for what they say.

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Show which processes are listening to which ports Authored by: markuswarren on Apr 26, '07 AM. GoogleDes sounds as though it might be GoogleDesktop, do you happen to have that installed? I too have port 21 associated with FTP. No sharing is turned on. In activity monitor I see that a process called Pacemaker is associated with Port Any thoughts? Pacemaker is part of the system clock function, it keeps the clock on schedule by periodically checking time against Apple servers. Thanks, Paul. Name required. Mail will not be published required. All Rights Reserved.

TCP and UDP ports used by Apple software products

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