Hi All,
I am measuring the diffrent kinds of traffic like FTP traffic , WWW
traffic , Mail Traffic etc. at my gateway. The method which I have chosen
is , each of these services runs under different standard ports like 20
,21 for FTP , 80 for WWW etc. using the Linux IPCHAIN utility. I am
getting the values correctly, i.e. it is giving some exact values when I
tranfers a file or access any WWW server.
Now my problem is , when a ftp or www clients gets connected to the ftp
or WWW server , it send a request to that particular port, and that
server will assign a different port not that particular port. At my
gateway I am listening to that particular port not the server assigned
ports and I am getting the exact values. Now the question is how this has
been happening. I am listing at that pericular ports, and servers will
assining different ports, How this mapping is done internally ? please
direct me some good URLs.
Thank you very much in advance
Regards
Venkat Hallale
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