An administrator attempts to download the .pack NBAR2 file using TFTP from the CPE router to another device over the Gi0/0 interface. The CPE is configured as below: hostname CPE
!
ip access-list extended WAN
<`¦>
remark => All UDP rules below for WAN ID: S421T18E58F90
permit udp any eq domain any
permit udp any any eq tftp
deny udp any any
!
interface GigabitEthernet0/0
<`¦>
ip access-group WAN in
<`¦>
!
tftp-server flash:pp-adv-csr1000v-1612.1a-37-53.0.0.pack
The transfer fails. Which action resolves this issue?