This, right?

; Adding an external IP will advertise your node to the network. This signals
; that your node is available to accept incoming channels. If you don't wish to
; advertise your node, this value doesn't need to be set. Unless specified
; (with host:port notation), the default port (9735) will be added to the
; address.
;
; NOTE: If you previously set one or more `externalip` entries and later
; remove `externalip` entirely from the config, lnd will continue to advertise
; the last known addresses from the previous run (they are stored with your node
; information). To stop advertising them, remove those addresses explicitly
; using the peers RPC/CLI, for example:
;   `lncli peers updatenodeannouncement --address_remove=1.2.3.4:9735`
; A restart is not required, a new node announcement will be broadcasted.

externalip=