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Configuring the Network
Advanced Settings
Cisco SPA100Series Administration Guide 35
1
VPN Passthrough (SPA122 Only)
Use the Network Setup > Advanced Settings > VPN Passthrough page to configure VPN
passthrough for IPsec, PPTP, and L2TP protocols. Use this feature if there are devices behind
the ATA that need to set up IPsec tunnels independently. For example, a device may need to
use a VPN tunnel to connect to another router on the WAN.
By default, VPN Passthrough is enabled for IPsec, PPTP, and L2TP.
After making changes, click Submit to save your settings, or click Cancel to redisplay the page
with the saved settings.
Field Description
MAC Clone Click Enabled to enable MAC address cloning, or click Disabled
to disable this feature.
Default setting: Disabled.
MAC Address Enter the MAC address that you want to assign to your ATA. If
your computers MAC address is the address that you previously
registered for your ISP account, click Clone Your PC’s MAC.
Your computers MAC address appears in the MAC Address
field.
Default setting: the current MAC address of your ATA
Field Description
IPsec Passthrough Internet Protocol Security (IPsec) is a suite of protocols used to
implement secure exchange of packets at the IP layer. Click
Enabled to enable this feature, or click Disabled to disable it.
Default setting: Enabled
PPTP Passthrough Point-to-Point Tunneling Protocol (PPTP) allows the Point-to-
Point Protocol (PPP) to be tunneled through an IP network. To
disable PPTP Passthrough, select Disabled. Default setting:
Enabled
L2TP Passthrough Layer 2 Tunneling Protocol is the method used to enable Point-
to-Point sessions via the Internet on the Layer 2 level. Click
Enabled to enable this feature, or click Disabled to disable it.
Default setting: Enabled
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