- Pfsense Rules For Mac Address
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Setup pfSense with MAC Address & Time Limit per Day. I'm pretty new to Reddit and PFSense, so if I do something wrong let me know haha. So I've been looking for a way to have a setup using the device's MAC Address then limiting it to let's say 1 hour per day of usage, then resets on the next day. Once pfSense is installed you’ll need to restart the system. Make sure you remove the USB drive. First-time pfSense boots you’ll see a wizard using which you can define LAN and WAN interfaces. Follow on-screen instructions to assign interface, IP addresses. Once all this is done you’ll need to log into the web interface to use pfSense. Setting a static ip by MAC in pfsense is adding a 'DHCP reservation' for that IP, meaning that when the client asks for an IP, the desired IP is given to it by the DHCP server(in this case pfsense). It's possible your client's DHCP address has not expired, or you mayve previously set it statically client-side.
Pfsense Rules For Mac Address
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To assign a new interface:
Navigate to Interfaces > Assignments
Pick the new interface from the Available network ports list
The newly assign interface will be shown in the list. The new interface willhave a default name allocated by the firewall such as OPT1 or OPT2, with thenumber increasing based on its assignment order. The first two interfacesdefault to the names WAN and LAN but they can be renamed. These OPTx namesappear under the Interfaces menu, such as Interfaces > OPT1. Selectingthe menu option for the interface will open the configuration page for thatinterface.
The following options are available for all interface types.
The name of the interface. This will change the name of the interface on theInterfaces menu, on the tabs under Firewall > Rules, under Services >DHCP, and elsewhere throughout the GUI. Interface names may only containletters, numbers and the only special character that is allowed is an underscore(“_”). Using a custom name makes it easier to remember the purpose of aninterface and to identify an interface for adding firewall rules or choosingother per-interface functionality.
IPv4 Configuration Type¶
Configures the IPv4 settings for the interface. Details for this option are inthe next section, IPv4 WAN Types.
IPv6 Configuration Type¶
Configures the IPv6 settings for the interface. Details for this option are inIPv6 WAN Types.
The MAC address of an interface can be changed (“spoofed”) to mimic a previouspiece of equipment.
We recommend avoiding this practice. The old MAC would generallybe cleared out by resetting the equipment to which this firewall connects, orby clearing the ARP table, or waiting for the old ARP entries to expire. Itis a long-term solution to a temporary problem.
Spoofing the MAC address of the previous firewall can allow for a smoothtransition from an old router to a new router, so that ARP caches on devices andupstream routers are not a concern. It can also be used to fool a piece ofequipment into believing that it’s talking to the same device that it wastalking to before, as in cases where a certain network router is using staticARP or otherwise filters based on MAC address. This is common on cable modems,where they may require the MAC address to be registered if it changes.
One downside to spoofing the MAC address is that unless the old piece ofequipment is permanently retired, there is a risk of later having a MAC addressconflict on the network, which can lead to connectivity problems. ARP cacheproblems tend to be very temporary, resolving automatically within minutes or bypower cycling other equipment.
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If the old MAC address must be restored, this option must be emptied out andthen the firewall must be rebooted. Alternately, enter the original MACaddress of the network card and save/apply, then empty the value again.
MTU (Maximum Transmission Unit)¶
The Maximum Transmission Unit (MTU) size field can typically be left blank,but can be changed when required. Some situations may call for a lower MTU toensure packets are sized appropriately for an Internet connection. In mostcases, the default assumed values for the WAN connection type will workproperly. It can be increased for those using jumbo frames on their network.
On a typical Ethernet style network, the default value is 1500, but the actualvalue can vary depending on the interface configuration.
MSS (Maximum Segment Size)¶
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Similar to the MTU field, the MSS field “clamps” the Maximum Segment Size(MSS) of TCP connections to the specified size in order to work around issueswith Path MTU Discovery.
Speed and Duplex¶
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The default value for link speed and duplex is to let the firewall decide whatis best. That option typically defaults to Autoselect, which negotiates thebest possible speed and duplex settings with the peer, typically a switch.
The speed and duplex setting on an interface must match the device to which itis connected. For example, when the firewall is set to Autoselect, the switchmust also be configured for Autoselect. If the switch or other device has aspecific speed and duplex forced, it must be matched by the firewall.
Block Private Networks¶
When Block private networks is active, pfSense® software inserts a ruleautomatically that prevents any RFC 1918 networks (
192.168.0.0/16) and loopback (
127.0.0.0/8) fromcommunicating on that interface. This option is usually only desirable on WANtype interfaces to prevent the possibility of privately numbered traffic comingin over a public interface.
Block bogon networks¶
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When Block bogon networks is active, pfSense software will block trafficfrom a list of unallocated and reserved networks. This list is periodicallyupdated by the firewall automatically.
Now that the IPv4 space has all been assigned, this list is quite small,containing mostly networks that have been reserved in some way by IANA. Thesesubnets should never be in active use on a network, especially one facing theInternet, so it’s a good practice to enable this option on WAN type interfaces.For IPv6, the list is quite large, containing sizable chunks of the possibleIPv6 space that has yet to be allocated. On systems with low amounts of RAM,this list may be too large, or the default value of Firewall Maximum TableEntries may be too small. That value may be adjusted under System >Advanced on the Firewall & NAT tab.