User manual
Conceptronic C300BRS4 (v2.0)          User Manual 
36 
7.  The new settings must be saved and the Router must be restarted for the settings to go into 
effect. To save and reboot the Router, click on the Tools button in the top menu and select 
the  System button in the left menu. In the System Management window, click the Save 
button under Save Settings to Local Hard Drive and then click the Reboot button to reboot the 
C300BRS4. 
8.  The Router will save the new settings and restart. Upon restarting, the Router will 
automatically establish the WAN connection. 
Additional settings for Dynamic IP Address connections: 
Dynamic IP Parameters  Description 
Host Name  This is not always necessary, but may be required for some ISPs. Type 
in the MAC address of your computer’s Ethernet adapter in the MAC 
Address field and click the Clone MAC Address button. This will copy 
the information to a file used by the Router to present to the ISP’s 
server used for DHCP. Some ISPs record the unique MAC address of 
your computer’s Ethernet adapter when you first access their network. 
If you want to later replace the cloned MAC address with the factory 
default setting, type in all zeros – 0:0:0:0:0:0 – and click the Clone 
MAC Address button. 
MAC Address   This is not always necessary, but may be required for some ISPs. Type 
in the MAC address of your computer’s Ethernet adapter in the Cloned 
MAC Address field and click the Clone MAC Address button. This will 
copy the information to a file used by the Router to present to the 
ISP’s server used for DHCP. Some ISPs record the unique MAC address 
of your computer’s Ethernet adapter when you first access their 
network. If you want to later replace the cloned MAC address with the 
factory default setting, type in all zeros – 0:0:0:0:0:0 – and click the 
Clone MAC Address button. 
Clone MAC Address   To clone the MAC address of your computer’s Ethernet adapter, type 
in the MAC address in the MAC Address field and then click this Clone 
MAC Address button. 
Primary DNS Address  Enter the Primary DNS Address. This information should be provided to 
you by your Internet Service Provider. 
Secondary DNS Address  The Secondary DNS Address is optional. See your Internet Service 
Provider for further information. 
MTU The Maximum Transmission Unit size may be changed if you want to 
optimize efficiency for uploading data through the WAN interface. The 
default setting (1500 bytes) should be suitable for most users. Some 
user may want to adjust the setting to optimize performance for 
wireless traffic or when low latency is desired (such as with Internet 
gaming). It is highly recommended that the user research how 
adjusting the MTU may affect network traffic for better or worse. 










