Freebsd servers to be done Senat attention arp broadcasting! When FREEBSD do with the recent discovery of NAT, ARP, and a broadcast mode on the card! 2:00 pm example : People who know a little basic knowledge network, ARP broadcasts through the IP address to MAC address analysis. FREEBSD the kernel in such an pseudo-device bpfilter 4, when used with the BSD do DHCP; Meanwhile, this also determines the network interface card in promiscuous mode to work or, if in promiscuous mode, the computer will then read the card data capture; Instead, If it has nothing to do with this machine, the computer will be ignored. 2:00 pm, when opened pseudo-device bpfilter this, if the network broadcasting ARP machine issued at the request of the server's network interface card data will be read, it will be treated and then disposed of or return information, though this will increase the burden on the server, and some processing time, After all, but there was a net amount is not a lot of ARP broadcasts, can be handled after the normal work! When the pseudo-device bpfilter Zhushidiao this, if the network broadcasting ARP machine issue, because at that time NIC-hybrid model, it is not dealing with these ARP broadcasting, the broadcasters will remain constant flow of the server's network card, even some broadcasters is sent to the server. Gateway server as well! Happen! If it is a general card, such as 8139 when the server will generally leave dead similar to the Windows fake lockup, despite the server can still work, but using such software PUTTY not landing on the server, even in the planes landing opportunities not, the main thing is that it will affect the network performance. For example, to enable lower-speed network! If under normal circumstances FREEBSD which can be switched on for several months, then the moment, it can only be switched on for 20 days, and even fewer days! NIC also a strong point of good affordability some categories such as 3C. Server when reservations are made before I pseudo-device bpfilter this, so even a small number of general ARP broadcast soon to deal with the enemy, but I have to treat pseudo-device bpfilter Zhushidiao. Therefore, the server will be traveling ARP broadcast from the impact and burned. Also inadvertently discovered this problem, to draw attention to this situation. Because as a server, we will not allow it any ounce of the accident, but also to ensure that it played the greatest, the most outstanding performance of the network. Freebsd servers to be done Senat attention arp broadcasting! But if the machines do NAT+DHCPD how? Freebsd servers to be done Senat attention arp broadcasting! It is very natural, nothing! [ Closed window ]