There is one more question is if i have to change the TTL of AIX so how do i proceed about it.

Please help me

I dunno what version of AIX you are implying here but....
For AIX 4.3 here is a command page... it is the command "no"

http://nscp.upenn.edu/aix4.3html/cmds/aixcmds4/toc.htm

But you'd use it as
no -o tcp_ttl=150
no -o udp_ttl=150

the default values for TTL's on AIX are:
TCP: 60
UDP: 30

You may need to make a script onstartup or something to that extent to make it permanent (I do not know if it is or not). But that should be easy