Code:
# freebsd-update fetch
Looking up update.FreeBSD.org mirrors... 4 mirrors found.
Fetching public key from update4.FreeBSD.org... failed.
Fetching public key from update5.FreeBSD.org... failed.
Fetching public key from update3.FreeBSD.org... failed.
Fetching public key from update2.FreeBSD.org... failed.
No mirrors remaining, giving up.
i got this error on freebsd update,some hint?