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Update LinkSys VPN endpoints with DHCP-assigned WAN IPs Network
We use LinkSys BEFSX41 router / gateway / firewall / VPN appliances to interconnect the LANs at three sites via VPN. Since two of the sites have DHCP-supplied WAN IP addresses, we needed a way to notify the other sites when the LinkSys' WAN IP address changes. This is required so the Remote Security Gateway's IP address for the VPN tunnel can be updated.

Since the addresses don't change that often, I wrote a script to detect any change and send email to the interested parties. If you are interested, that script is available for download (download 2KB script), and usage is explained in the script comments.
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Update LinkSys VPN endpoints with DHCP-assigned WAN IPs | 2 comments | Create New Account
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Update LinkSys VPN endpoints with DHCP-assigned WAN IPs
Authored by: displaced on May 23, '03 10:18:30AM

Have you considered something like http://www.dyndns.org/ to provide a dynamically-updated fully-qualified domain name which will negate the dynamic IP problem?

(obviously, I can see situations where this wouldn't be viable, but thought I'd mention it just in case ;))



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Update LinkSys VPN endpoints with DHCP-assigned WAN IPs
Authored by: rarpsl on May 23, '03 04:17:24PM

The new 802.11g  WRT54G wireless router has microcode to automatically update dyndns.org whenever the WAN address changes. LinkSys (ie: Cisco who bought LinkSys recently) has not yet issued Firmware updates with this capability for its other routers.



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