Proxicast

Topics > LAN-Cell 2 > FAQ ID # 115

FAQ ID # 115
Last Update : 2008/04/04
Rating : Not Rated
Send FAQ by E-mail
Add to favorites
Print this FAQ

Social Bookmark this Article :


Question / Issue
Unable to access web sites when failed over from WAN to Cellular connection

Answer / Solution

Condition:
Wired WAN as primary connection, Cellular as secondary connection.  Mode=Failover/Fallback.  When WAN connection is UP, users can access web sites.  When WAN connection is DOWN and Cellular is UP, users cannot access web sites on the Internet.

Issue:
Some ISPs do not respond to DNS requests from IP addresses that they do not own. When the LAN-Cell fails over to the Cellular interface, it does not force a DHCP renewal of client devices, therefore the devices will try to get DNS resolution using the wired ISP's DNS servers. If your LAN devices receive DNS information from the LAN-Cell via DHCP or you have staticly assigned DNS server addresses on your devices, you must change the DNS settings.

Resolution:
On the LAN-Cell, check the ADVANCED > DNS > DHCP tab.  Set the LAN DNS server values to NONE so that the client devices will send their DNS requests to the LAN-Cell and it can forward them on to whichever interface is up.  Or enter your own DNS server values for a DNS that you know will respond to either IP address scheme.

For addresses manually assigned to client devices, set the DNS server to the LAN-Cell's LAN IP address or your own DNS server.


Related FAQs
LAN and/or WiFi clients unable to access the Internet.

Direct Link to This FAQ
http://www.proxicast.com/AbsoluteFM/?f=115

Tags
fail over backup no access connection ping
How would you rate this article?

Poor
1
2
3
4
5

Great
Submit

Back to Top