My server IP 122.155.3.215 cannot connect to msync node IP 124.217.252.175.
I also test with my nearby ip and it can connect to 124.217.252.175 without problem.
traceroute to 124.217.252.175 (124.217.252.175), 20 hops max, 40 byte packets
1 122.155.3.3 (122.155.3.3) 0.461 ms 0.427 ms 0.614 ms
2 (61.19.240.105) 0.391 ms 0.583 ms 0.568 ms
3 202.129.31.253 (202.129.31.253) 0.294 ms 0.296 ms 0.282 ms
4 202.47.236.37 (202.47.236.37) 0.729 ms 0.720 ms 0.942 ms
5 202.47.236.110 (202.47.236.110) 2.431 ms 202.47.236.6 (202.47.236.6) 2.400 ms 2.388 ms
6 122.155.226.49 (122.155.226.49) 1.861 ms 4.544 ms 4.681 ms
7 * * *
8 * 61.19.7.118 (61.19.7.118) 5.054 ms *
9 61.19.14.142 (61.19.14.142) 4.287 ms 4.233 ms 61.19.9.158 (61.19.9.158) 31.198 ms
15 * * *
16 * * *
17 * * *
18 * * *
19 * * *
20 * * *