Venkatesh Keshava Reddy is from India. He is working in the field of Internet related services for the past 6 years. You can contact him for issues concerning the TOS marking option in the ZPH series of SQUID patches.
Mr. Reddy has modified the original ZPH patch in such a way that, SQUID can now change the TOS field in the IP header of packets containing cache hit responses to HTTP clients. Currently (as in the original patch) the actual value that is used for TOS is hardcoded in the patch, and can be changed only at compile time. The value being used is 0x10 (16 decimal), which corresponds to High Throughput (according to RFC795). You may consider changing this value, as it is common for some HTTP servers to mark the return traffic with this TOS. Alternatively you may (I recommend this approach) mangle TOS field on your ingress router(s) to appropriate values according to locally assigned policies.
tar -zxvf squid-2.5.STABLEX.tar.gz3. Change to SQUID's source directory and apply the patch (check main page for info on the latest version):
or, for the bzip2 archive:
tar -jxvf squid-2.5.STABLEX.tar.bz2
patch -p1 < ../squid-2.5.STABLEX-ToS_Hit.patch
....... class creation, other filters .....
$TC filter add dev $LANDEV parent 1:0 protocol ip prio 1 u32 \
match ip protocol 0x6 0xff \
match ip tos 0x10 0xff \