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On ISA 2004 (which is part of SBS 2003 Premium Edition) Event 14147 is logged that the IP is spoofed.
Event Type: Error
Event Source: Microsoft Firewall
Event Category: None
Event ID: 14147
Computer: SBS
Description:
ISA Server detected routes through the network adapter LAN that do not correlate with the network to which this network adapter belongs. When networks are configured correctly, the IP address ranges included in each array-level network must include all IP addresses that are routable through its network adapters according to their routing tables. Otherwise valid packets may be dropped as spoofed. The following ranges are included in the network's IP address ranges but are not routable through any of the network's adapters x.x.x.x- x.x.x.x ;. Note that this event may be generated once after you add a route, create a remote site network, or configure Network Load Balancing and may be safely ignored if it does not re-occur.
STEPS TO RESOLVE
Step 1. Configure the Network setting on ISA 2004 correctly.
1.Start the ISA Server Management program. To do this, click "Start", point to "All Programs", point to "Microsoft ISA Server", and then click "ISA Server Management".
2. Expand "", and then click "Firewall Policy".
3. In the right pane, click the "Toolbox" tab, and then click "Network Objects".
4. Expand "Networks", and then click the network object that you want to modify. For example, click "Internal".
5. Click "Edit", and then click the "Addresses" tab.
6. Under "Address ranges", click the address range that you experience this issue with, and then click "Remove". For example, click the "192.168.0.1 to 192.168.254" address range.
7. Click "Add Adapter", click to select the check box of the network adapter that you want to add to this particular network, and then click "OK".
Step 2. Try giving static range on the DHCP server to the VPN clients . Try giving a different range of IP address which is different from the internal range of IP.
If the above steps do not help you resolve the issue please call Microsoft Technical Support.
Kommentar:
Overstående er postert av SBS Team vedr VPN. Etter min oppfattning er det forsåvit rellevant for deg. Jfr overstående eksluderes ip 10.0.0.255. Dette er en slags “broadcast ip” som ikke benyttes dvs deles ut til klienter. Den er vanligvis eksludert i DHCP server. Du kan forsøke å inkludere / eksludere 10.0.0.255. Det er mulig at din printer forsøker å finne ett eller annet på nettverket, og at ip 10.0.0.255 benyttes for dette formålet. Hvis jeg husker korrekt legger ISA Wizarden inn 10.0.0.1 til 10.0.0.254 i ISA Internal Networks. Alså, endr dette til 10.0.0.0 til 10.0.0.255 og sjekk om advarselen fortsatt dukker opp.