LARTC - Oct 2003 - Tc - Class HTB - Filter u32 - Match ip dport

My setup....

 [A]FTP Server  ----> [B]QOS Server ----> [C]Host

What I want to do.....

 Setup a HTB class for 32kbps with a u32 filter to match a Destination IP.

I get a perfect result for a ftp `get'' on [C].

  ftp> get test
  local: test remote: test
  227 Entering Passive Mode (203,200,72,102,12,231)
  150 Opening BINARY mode data connection for test (1025830 bytes).
  ##############################################################
  ########...................################
  226 Transfer complete.
  1025830 bytes received in 262 secs (3.8 Kbytes/sec)
  ftp>

The working cfg on [B] is as under...
 
 tc qdisc add dev eth0 root handle 10: htb 
 tc class add dev eth0 parent 10 classid 10:10 htb rate 32kbit ceil 32kbit
 tc filter add dev eth0 parent 10: protocol ip prio 100 u32 match ip dst
203.200.72.91 flowid 10:10

But download becomes out of control when I delete, just the filter to
replace it with...

 tc filter add dev eth0 parent 10: protocol ip prio 100 u32 match ip sport
20 0xffff flowid 10:10

                       ---OR---

 any sport/dport with a valu of 20,21,22 14,15,16 0014,0015,0016

  
When the test setup & the test procedure is the same. 
It should work for the Protocol if it worked for the IP

!!!What could be wrong!!!!

  I only change from `u32 match ip dst 203.200.72.91'' to ''u32
match ip
<sport|dport> <ftp-ports> 0xffff''
  I tried with all known <ftp-ports> as `sport'' &
`dport'' both in decimal &
Hex.

Regards,

Somesh Banerji
Sr. Engineer
HCL Comnet System & Services
NOIDA U.P. INDIA       
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Hi,
>  ftp> get test
>  local: test remote: test
>  227 Entering Passive Mode (203,200,72,102,12,231)
                ^^^^^^^^^^^^
>  150 Opening BINARY mode data connection for test (1025830 bytes).
>  ##############################################################
>  ########...................################
>  226 Transfer complete.
>  1025830 bytes received in 262 secs (3.8 Kbytes/sec)
>  ftp>
This log shows that you are using Passive FTP
> tc filter add dev eth0 parent 10: protocol ip prio 100 u32 match ip sport
> 20 0xffff flowid 10:10
now you put up a rule for sport 20.
Passiv FTP does not use sport 20, it uses any port > 1024, 
only "active" FTP uses port 20 as sport for data transfare,..

Jan Gerritsen