[root@zshts011 backup]# telnet 192.168.31.42
Trying 192.168.31.42...
telnet: connect to address 192.168.31.42: No route to host
Solution:
Execute on the target machine: iptables -F
[root@zshts011 backup]# telnet 192.168.31.42
Trying 192.168.31.42...
Connected to 192.168.31.42.
Escape character is '^]'.
Red Hat Enterprise Linux Server release 6.2 (Santiago)
Kernel 2.6.32-220.el6.x86_64 on an x86_64
login:
The execution was successful! ! !