Hello, I have a linksys rv016 as a default gateway between our lan and the internet. Firmware is 2.0.18. Recently some clients on our lan started having intermittent problems accessing the internet. After a bit of searching the obvious we got to the more tricky stuff and found out that for an ARP request, the router would reply with the MAC addresses for its LAN AND WAN port instead of just replying with the MAC for the LAN port. In effect, clients were intermittently pushed the WAN mac address effectively preventing them to get out to the internet. The DHCP server provides the right IP for the default gateway at all time. To temporarly fix the problem, we've modified the domain login script to include a static arp entry to the LAN port of the default gateway. This problem started occuring after upgrading all the workstations to XP SP3, Office 2003, office 2003 SP3, windows updates, avg 8.0. It seems unlikely that the installation of one of the above caused the problem. However, at the same time, we also replace our Alcatel speedtouchhome DSL modem with a new Speadstream/Router/Wireless/DSL modem. This new modem is currently hook up to WAN1 on our linksys and we had to input a LAN ip into it as well. We are in the 10.1.0.0 range. Why is my linksys broadcasting it's lan AND wan mac address to the clients?