Cann't do both of the two commands when vpn is used for my case, see the following for detail:
address@hidden:~$ telnet -l zhaohscas
news.rusnet.ru 119
Trying 195.208.113.96...
telnet: Unable to connect to remote host: Connection refused
address@hidden:~$ tcptraceroute
news.rusnet.ruSelected device tun0, address 10.211.105.169, port 34257 for outgoing packets
Tracing the path to
news.rusnet.ru (195.208.113.96) on TCP port 80 (http), 30 hops max
1
aspen.stu.neva.ru (195.208.113.96) [closed] 248.460 ms 257.396 ms 249.649 ms