私のFreeBSD 11は以下を提供します：
[root@freebsd11 ~]# pkg install perl
Updating FreeBSD repository catalogue...
Certificate verification failed for /O=Digital Signature Trust Co./CN=DST Root CA X3
34406394360:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269:
Certificate verification failed for /O=Digital Signature Trust Co./CN=DST Root CA X3
34406394360:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269:
Certificate verification failed for /O=Digital Signature Trust Co./CN=DST Root CA X3
34406394360:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269:
Certificate verification failed for /O=Digital Signature Trust Co./CN=DST Root CA X3
34406394360:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269:
Certificate verification failed for /O=Digital Signature Trust Co./CN=DST Root CA X3
34406394360:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269:
Certificate verification failed for /O=Digital Signature Trust Co./CN=DST Root CA X3
34406394360:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269:
pkg: https://pkg.freebsd.org/FreeBSD:11:amd64/latest/meta.txz: Authentication error
repository FreeBSD has no meta file, using default settings
Certificate verification failed for /O=Digital Signature Trust Co./CN=DST Root CA X3
34406394360:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269:
Certificate verification failed for /O=Digital Signature Trust Co./CN=DST Root CA X3
34406394360:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269:
Certificate verification failed for /O=Digital Signature Trust Co./CN=DST Root CA X3
34406394360:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269:
pkg: https://pkg.freebsd.org/FreeBSD:11:amd64/latest/packagesite.pkg: Authentication error
Certificate verification failed for /O=Digital Signature Trust Co./CN=DST Root CA X3
34406394360:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269:
Certificate verification failed for /O=Digital Signature Trust Co./CN=DST Root CA X3
34406394360:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269:
Certificate verification failed for /O=Digital Signature Trust Co./CN=DST Root CA X3
34406394360:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269:
pkg: https://pkg.freebsd.org/FreeBSD:11:amd64/latest/packagesite.txz: Authentication error
Unable to update repository FreeBSD
Error updating repositories!
証明書が期限切れになったために発生しているようですが、解決策がわかりません。