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#
# Copyright 2022 The Sigstore Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Number of attempts to contact a ntp server before giving up.
request_attempts: 3
# The timeout in seconds for a request to respond. This value must be
# smaller than max_time_delta.
request_timeout: 5
# Number of randomly selected ntp servers to interrogate.
num_servers: 4
# Number of servers who must agree with local time.
server_threshold: 3
# Maximum number of seconds the local time is allowed to drift from the
# response of a ntp server
max_time_delta: 6
# Period (in seconds) for polling ntp servers
period: 60
# List of servers to contact. Many DNS names resolves to multiple A records.
servers:
#
# stratum 1 servers:
#
# Apple AS6185
- "time.apple.com"
# Google AS15169
- "time.google.com"
- "time1.google.com"
- "time2.google.com"
- "time3.google.com"
- "time4.google.com"
# Nist AS49 AS104
- "time-a-b.nist.gov"
- "time-b-b.nist.gov"
- "time-c-b.nist.gov"
- "time-d-b.nist.gov"
# time-*-g.nist.gov times out a lot
# "time-a-g.nist.gov"
# "time-b-g.nist.gov"
# "time-c-g.nist.gov"
# "time-d-g.nist.gov"
# Netnod AS57021
- "gbg1.ntp.se"
- "gbg2.ntp.se"
- "mmo1.ntp.se"
- "mmo2.ntp.se"
- "sth1.ntp.se"
- "sth2.ntp.se"
- "svl1.ntp.se"
- "svl2.ntp.se"
# Berkely AS25
- "ntp1.net.berkeley.edu"
- "ntp2.net.berkeley.edu"
#
# stratum 3 servers:
#
# Cloudflare AS13335
- "time.cloudflare.com"
# Microsoft AS8075
- "time.windows.com"
#
# stratum 4 servers:
#
# AWS AS16509
- "time.aws.com"
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