In Cisco routers under some versions of IOS 12.0 running NAT, some packets may not be filtered by input access list filters.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ios | Cisco | 12.0 (including) | 12.0 (including) |
| Ios | Cisco | 12.0(1)w (including) | 12.0(1)w (including) |
| Ios | Cisco | 12.0(1)xa3 (including) | 12.0(1)xa3 (including) |
| Ios | Cisco | 12.0(1)xb (including) | 12.0(1)xb (including) |
| Ios | Cisco | 12.0(1)xe (including) | 12.0(1)xe (including) |
| Ios | Cisco | 12.0(2)xc (including) | 12.0(2)xc (including) |
| Ios | Cisco | 12.0(2)xd (including) | 12.0(2)xd (including) |
| Ios | Cisco | 12.0(2)xf (including) | 12.0(2)xf (including) |
| Ios | Cisco | 12.0(2)xg (including) | 12.0(2)xg (including) |
| Ios | Cisco | 12.0db (including) | 12.0db (including) |
| Ios | Cisco | 12.0s (including) | 12.0s (including) |
| Ios | Cisco | 12.0t (including) | 12.0t (including) |