Dns error

[emiratesmac]

Here's a mystery: Earlier tonight we had problems with our VPS, all sites were unavailable from time to time. Support said it was maxclients and keepalive something. So we fixed that, and then the sites worked.

Now, two sites in particular are still unavailable at times with a dsn_server_failure showing. Now for people outside the UAE the sites work fine, but for us in the UAE they don't. In UAE all internet traffic goes through a government-controlled proxy.

If anyone has ideas, please let us know. I'd hate to move host, if that's even the problem, but I will if it help our sites.

[emiratesmac]

I did traceroute to emiratesmac.com:
1 192.168.1.1 (192.168.1.1) 1.194 ms 0.700 ms 0.846 ms
2 213.42.4.24 (213.42.4.24) 8.305 ms 8.392 ms 8.174 ms
3 213.42.5.113 (213.42.5.113) 11.215 ms 11.199 ms 19.787 ms
4 * * *
5 195.229.31.249 (195.229.31.249) 10.934 ms 195.229.0.113 (195.229.0.113) 12.163 ms 195.229.31.245 (195.229.31.245) 11.809 ms
6 195.229.0.194 (195.229.0.194) 216.825 ms 195.229.0.118 (195.229.0.118) 146.059 ms 195.229.0.194 (195.229.0.194) 212.078 ms
7 fr3.ams.llnw.net (195.69.145.133) 149.273 ms 150.168 ms 10ge5-4.fr1.lga.llnw.net (198.32.160.134) 226.342 ms
8 tge5-1.fr4.lga.llnw.net (69.28.171.86) 246.966 ms ve2002.fr4.lga.llnw.net (69.28.171.202) 238.347 ms 240.116 ms
9 tge2-3.fr4.iad.llnw.net (69.28.171.153) 234.529 ms 229.465 ms 233.421 ms
10 readnews.defender.tge1-4.fr4.iad.llnw.net (69.28.158.174) 259.846 ms 238.332 ms 243.375 ms
11 aggr-sw2.iad.defenderhosting.com (69.65.112.94) 248.569 ms 235.816 ms 233.530 ms
12 eqash114.keepitsecure.net (69.65.115.153) 236.989 ms 237.850 ms 229.468 ms
13 me08.e1satellite.com (205.234.96.2) 230.385 ms 228.386 ms 229.822 mse1satellite.com? I can't find out what it is.

Then for a site that works (on the same VPS as emiratesmac.com), I get this:
1 192.168.1.1 (192.168.1.1) 1.268 ms 0.715 ms 0.584 ms
2 213.42.4.24 (213.42.4.24) 10.046 ms 10.051 ms 8.751 ms
3 213.42.5.98 (213.42.5.98) 9.771 ms 9.516 ms 11.888 ms
4 194.170.0.134 (194.170.0.134) 9.689 ms 9.748 ms 10.773 ms
5 195.229.0.109 (195.229.0.109) 10.470 ms 9.864 ms 9.760 ms
6 nyc-emix-cb.po600.emix.ae (195.229.0.226) 214.100 ms 228.136 ms 214.710 ms
7 10ge5-4.fr1.lga.llnw.net (198.32.160.134) 220.537 ms 220.821 ms 219.517 ms
8 tge2-4.fr3.iad.llnw.net (69.28.171.157) 259.232 ms 261.753 ms 258.070 ms
9 ve5.fr4.iad.llnw.net (69.28.171.214) 255.699 ms 263.241 ms 254.950 ms
10 readnews.defender.tge1-4.fr4.iad.llnw.net (69.28.158.174) 230.599 ms 230.444 ms 232.159 ms
11 aggr-sw2.iad.defenderhosting.com (69.65.112.94) 232.822 ms 230.809 ms 231.901 ms
12 eqash114.keepitsecure.net (69.65.115.153) 228.129 ms 229.714 ms 229.433 ms
13 unknown25.126.65.69.defenderhosting.com (69.65.126.25) 231.055 ms 230.503 ms *So last jump is different...

[Robert]

You're traceing to 2 different IPs which both have different rDNS records. That's why the last hop show something different. It's the same server, just a different reverse DNS entry.