When RRAS is running, and you have both an internal and external NIC, you can't ping the external NIC?
The RRAS Setup Wizard installs filters on the external (Internet) adapter to process only VPN traffic. The filters are:
| Src Addr | Src Mask | Dest Addr | Dest Mask | Protocol | Src Port | Dest Port | Description |
|---|---|---|---|---|---|---|---|
| Any | Any | Any | Any | 47 | Any | Any | GRE |
| Any | Any | Any | Any | TCP | 1723 | Any | PPTP Inbound |
| Any | Any | Any | Any | TCP | Any | 1723 | PPTP Outbound |
| Any | Any | Any | Any | UDP | 500 | 500 | ISAKMP |
| Any | Any | Any | Any | UDP | 1701 | 1701 | L2TP |
To see a which filters are defined for an adapter:
1. Start the Routing and Remote Access snap-in in Microsoft Management Console (MMC).
2. Expand the IP Routing node in the left hand pane.
3. Press General in the left hand pane.
4. Right-click the adapter in the right hand pane, and then press Properties.
5. You can view and edit the Inbound and Outbound filters on the General tab.
To allow pinging to and from the external network adapter, add Inbound and Outbound filters to the adapter to allow ICMP (Internet Control Message Protocol) packets to be processed on the adapter:
1. Follow steps 1 - 4 above.
2. Press Input Filters.
3. Press Add.
4. Select ICMP in the Protocol box.
5. Press OK and OK.
6. Press Output Filters.
7. Press Add.
8. Select ICMP in the Protocol box.
9. Press OK and OK.
