What IP and/or MAC address information shouldn't be included on a forum post?

To diagnose issues, I might use ifconfig or arp or something similar. What output of these commands and other commands should I not include in a post to protect myself from hackers? For instance:

• ifconfig's HWaddr?
• ifconfig's inet addr? I expect it is fine if local, right?
• ifconfig's inet6 addr? I expect it is fine if local, right?
• arp's string after each device's IP (for instance, something like bla (192.168.1.10) at xx:xx:xx:xx:xx:xx[ether] on eth0)
• What else?

Thanks

I'd cleanse the public IP, domain, and maybe the MAC if you want. Device names and local IPs don't matter, everyone uses the same private blocks.

Not sure the mac address would help in a topic but there are more than one mac address in the world that are the same. Not sure anyone could use it for anything. Usually the first three sets of numbers are all that are needed to id an issue.


In a very real sense your public side of your system is in constant state of attack. You have to secure you system from all of that. Bots are trying to access every device in the world on an automated scale. They already know your ip addres.

Originally Posted by jefro Bots are trying to access every device in the world on an automated scale. They already know your ip addres.

There's a big difference between "a bot has pinged NotionCommotion's IP before" and "a person with malcontent now knows that 23.54.121.33 belongs to NotionCommotion who's running an outdated CentOS 6.3 system with VNC listening to incoming connections on port 2343, SSH version 5.3 listening on port 8123, and [insert any other service NotionCommotion has revealed he uses in his 558 posts on this forum over the last 5 years]".

* all the above information has been made up on the fly

Thanks all!

You got me nervous for a bit suicidealeggroll before I realized that the configuration you listed wasn't mine and you made it up on the fly