For years now I’ve had a problem that for some reason my NTP servers work fine via one Internet provider but not the other one. So my guess is that somewhere between the monitoring station and my servers port 123 is being blocked. Right now I set up 2 servers for testing, one works the other does not, both can be reached by the monitoring station just fine:
provider 1 works:
Traceroute to 200.59.21.5
1 * *
2 (169.254.74.0) 0.132 0.159
3 (10.253.4.207) 0.121
3 (10.253.4.209) 0.212
4 (10.253.4.147) 9.348
4 (10.253.4.149) 1.052
5 (62.115.179.210) AS1299 0.439
5 nyk-b4-link.ip.twelve99.net (62.115.180.4) AS1299 0.441
6 nyk-bb1-link.ip.twelve99.net (62.115.114.178) AS1299 1.253 1.133
7 (62.115.136.201) AS1299 7.036
7 rest-bb1-link.ip.twelve99.net (62.115.141.244) AS1299 7.790
8 mai-b2-link.ip.twelve99.net (62.115.120.177) AS1299 31.769 31.737
9 navega-svc070684-ic356808.ip.twelve99-cust.net (62.115.56.165) AS1299 32.312 31.536
10 * *
11 * *
12 (186.176.7.74) AS262197 81.198 81.331
13 www.fratec.net (200.59.21.5) AS262149 81.141 71.528
provider 2 does not work:
Traceroute to 200.59.20.230
1 * *
2 (169.254.74.0) 0.171
2 (169.254.74.1) 0.125
3 (10.253.4.205) 0.107
3 (10.253.4.207) 0.084
4 (10.253.4.149) 1.222
4 (10.253.4.147) 0.669
5 (62.115.179.210) AS1299 0.344
5 nyk-b4-link.ip.twelve99.net (62.115.180.4) AS1299 0.349
6 nyk-bb1-link.ip.twelve99.net (62.115.114.178) AS1299 1.317 1.334
7 rest-bb1-link.ip.twelve99.net (62.115.141.244) AS1299 8.742 7.133
8 boca-b2-link.ip.twelve99.net (62.115.123.29) AS1299 32.434 32.461
9 (62.115.11.225) AS1299 32.261
9 asurnet-svc080563-ic370378.ip.twelve99-cust.net (62.115.149.31) AS1299 32.474
10 (69.79.102.1) AS23520 32.700
10 ae2.brx-mx2020-2.boca-raton.fl.usa.cwc.com (69.79.100.5) AS23520 32.448
11 (69.79.102.1) AS23520 32.467
11 (69.79.106.49) AS23520 52.216
12 (69.79.106.49) AS23520 52.502 52.001
13 * *
14 111-72-179-186.ufinet.co.cr (186.179.72.111) AS52468 69.117 68.831
15 (200.59.20.230) AS262149 69.357
Now using wetwiz.net both look ok:
NTP Server Test for 200.59.21.5
NTP Server Test for 200.59.20.230
But if I try to add the second one to the pool I get
200.59.20.230
Could not check NTP status
So, I need help sorting this out, I need to pinpoint the problem so whoever is responsible can fix it. If anyone has an idea how to find the problem, please let me now. Thanks