Received reports this morning that one of our clients had a network outage that started for a couple of users yesterday evening and for other users this morning. The issue SEEMED to resolved itself. After digging around I found that my MS server that was hosting DHCP had stopped making it appear as if DHCP wasn't configured. Performing an ipconfig from a workstation revealed an entirely different subnet then what was configured on the network. I then performed a network scan and found that the device acting as the router/DHCP server was a Mac. This network only has one user who has a Mac. Once this user unplugged from the LAN I was able to restart DHCP my original DHCP scope was still intact and end-users were able to restart and get on the proper subnet.
Any thoughts on how to protect the network from roug DHCP servers? Oh and does anyone know how to enable/disable a Mac from being a router? The Mac user is left without network connectivity until we can resolve the issue. Mac OS X (standard client OS, without OS X Server/Server.app in use) does not and cannot provide DHCP out of the box, except perhaps as noted via the Internet Sharing feature. Internet Sharing is never enabled without user interaction. A user would have to specifically access their System Preferences, Sharing and explicitly enable the sharing feature while simultaneously ignoring the very serious warning the system puts up: The best ways to prevent this kind of egregious behavior by a user is to manage your workstations: Do not provide admin privileges by default, and require administrator privileges for system preferences: In the Security & Privacy pref pane, click on the Advanced button and enable the option to 'Require an administrator password to access system-wide preferences.' Things can further be locked down with an appropriately configured Profile.
For some more about securing Mac OS X, see. In all seriousness, I've never had a problem like that. With proper VLANs setup, even the Apple intermediary networking devices can't pull down anything and I get the call 'yeah, my wifi isn't working?'
Show up and say 'yeah we're not supporting your personal stuff. That's why we dumped $100k into our WiFi infrastructure. To bolster it for end users.'
Apple OS X Server: Setting up and managing DHCP. Setting up DHCP. Open the Server.app application (Figure A). Jesus Vigo is a Network Administrator by day and owner of Mac|Jesus, LLC.
User: 'Yeah but some websites are blocked, so I was trying to get around that.' Me: 'Well that is happening at the filter not the. Ah, forget it.'
The project is a free, open source tailored version of for use as a firewall and router with an easy-to-use web interface. You can buy official pfSense appliances directly from or a.
You can install the software yourself on your own hardware. We have a great community that helps, but we also provide 24x7.
Rules of Submission Before asking for help please do the following: • Look over at our • Use a search engine like Google to search across the pfsense.org domain: • If you are looking for help with basic networking concepts, please try or for more advanced,. • Do not post items for sale in this subreddit. If you are looking to sell or buy used hardware, please try. • This subreddit is primarily for the community to help each other out, if you have something you want the maintainers of the project to see we recommend posting in the appropriate category on our. This is a community subreddit so lets try and keep the discourse polite. Tl;dr: Be excellent with each other.
Related Subreddits - home of the pfSense project. Hey First time poster, been using pfsense successfully for about 6 months now. Pfsense 2.3.4, using openVPN client for PIA vpn access, pfBlockerNG installed All of my stuff worked great until today. I noticed some odd MAC traffic and after some consideration i recorded all of the MAC address of devices in my home and setup static DHCP entries without ip adresses (per pfsense wiki) so i could whitelist my devices and prevent unwanted access. When all of the entries were done, two MAC addresses stood out which I promptly blocked and applied my settings. After resetting the pfsense box and subsequent switches and my own PC, I can no longer resolve an IP address from the DHCP server.
![Server Server](https://i.ytimg.com/vi/Vt2ikpDLXBY/hqdefault.jpg)
![Mac Mac](https://kfigiela.github.io/img/2014-11-07-vbox-net.png)
In fact, I can't even connect to the to box with a direct Ethernet connection to a laptop. The pfsense box itself works fine, and with a monitor and a USB keyboard I can access the command line interface for pfsense. I have already tried resetting the configuration to a backup from a few days ago that made no difference. I want to avoid a factory reset of the machine. I can quickly reconfigure the box but I would like to save it.
My question: is it possible to reset the DHCP server settings to factory defaults without affecting other configurations? Can I do this without access to the Web Configurator? Thank you EDIT / UPDATE: So I've fixed it and I'm back in. I'll be honest, I'm not sure exactly why I was locked out on two separate machines. One runs ubuntu with virtual box installed and the other runs windows 10 but had VMware installed at one point and has an old network bridge from it. I think those vm network configurations were causing some weirdness that I honestly don't understand.