I' fairly certain this question has already been answered, since I doubt it to be a truly new question, however I could not find the question (nor the answer) through a simple search of the archives.
I'm in the process of setting up a somewhat reliable ntp setup, with the help of a friend. As of now, the setup is as follows: # ---- Server one config start: ----------- # Server one internal address: 192.168.4.19 # Server one external adresss: ntp1.d80.iso100.no # server 127.127.20.0 mode 7 prefer server 193.62.22.82 # Our international friends: server 85.248.115.102 server 145.24.129.5 server 195.10.6.126 server 128.10.252.6 server 129.174.93.11 server 155.101.3.114 server 218.21.130.42 server 219.117.196.43 server 219.117.196.238 # My Friends servers: # # XXXX peer my-friends.primary peer my-friends.satellite # My off-site servers (Available through static router-to-router VPN) peer 192.168.1.10 peer 192.168.1.11 # Our Cisco Routers peer 192.168.4.1 peer 192.168.4.254 peer 192.168.255.3 # ---- Server one config end ----------- # ---- Server two config start: ----------- # Server two internal address: 192.168.1.10 # Server two external adresss: ntp2.d80.iso100.no # Our main servers server 85.80.176.52 # My off-site servers (Available through static router-to-router VPN) peer 192.168.4.19 peer 192.168.1.11 # My Friends servers: # # XXXX peer my-friends.primary peer my-friends.satellite # Our International friends server 217.147.223.78 server 64.73.32.134 server 163.25.109.18 # Our Cisco boxes ntp peer 192.168.1.1 ntp peer 192.168.255.1 ntp peer 192.168.255.2 # ---- Server two config end ----------- # ---- Server three config start: ----------- # Server two internal address: 192.168.1.11 # Server two external adresss: ntp3.d80.iso100.no # Our basic servers server 192.36.143.153 # My off-site servers (Available through static router-to-router VPN) peer 192.168.4.19 peer 192.168.1.10 # My Friends servers: # # XXXX peer my-friends.primary peer my-friends.satellite # Our international friends server 163.25.109.18 server 211.51.221.130 server 66.96.96.29 # Our Cisco routers # Our Cisco boxes ntp peer 192.168.1.1 ntp peer 192.168.255.1 ntp peer 192.168.255.2 # ---- Server three config end ----------- As you can see, all servers are today inter-peering, and getting a lower-stratum external sources aswell as servers on local and remote continents. On my primary (ntp1), I'm considering bringing my trusty old Garmin GPS-III out of retirement, and setting it up as a standard NMEA (not pps) time source, with UPS-support. The question is this: Will a setup such as this be accurate and/or stable enough to be of value to the pool.ntp.org, and especially no.pool.ntp.org, or is the setup not accurate enough for this? The dns adresses given in the header for each server config matches a real entry, and I'm open for feedback on what I can do to reconfigure (if needed) before providing public service. Since my own need for accurate clock is limited to the accuracy of logs (before writing abuse mails), and the cpu load on these servers are light, the added load from public use is insignificant. All three servers are running behind Cisco IOS Firewalls with audit-trail on NTP traffic (set up to drop any packets that doesn't conform to the protocol standard). All servers are running FreeBSD, and the OS/Platform spread is as follows: ntp1.d80.iso100.no: FreeBSD RELENG_7 AMD64 ntp2.d80.iso100.no: FreeBSD RELENG_6 i386 ntp3.d80.iso100.no: FreeBSD RELENG_6 AMD64 Any and all input welcomed. Regards, Svein Skogen -- Svein Skogen | Mobile Phone: +47 907 03 575 Solberg Østli 9 | [EMAIL PROTECTED] 2020 Skedsmokorset | PGP Key: 0xE5E76831 Norway | RIPE handle: SS16503-RIPE ------------------------+----------------------------- msn messenger: | [EMAIL PROTECTED] |
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