tcptraceroute ends with duplicate ip

In the process of trying to setup openvpn on my Linux machine, I ran into a a problem with "No route to host." When I diagnosed this with tcptraceroute I see that the last two entries are duplicate IPs. Is it possible that my ISP is intentionally blocking traffic? Can anyone suggest a workaround or do I need to switch internet providers? Otherwise the Linux computer has no problems with network connectivity.

Here is an anonymized tcptraceroute excerpt:

$ sudo tcptraceroute 189.214.yyy.yyy
...
...
17 177.238.xxx.xxx.cable.dyn.cableonline.com.mx (177.238.xxx.xxx) 95.734 ms 100.253 ms 98.005 ms
18 177.238.xxx.xxx.cable.dyn.cableonline.com.mx (177.238.xxx.xxx) 101.598 ms !X 101.614 ms !X 98.502 ms !X