10-27-2010
I have used the arp commands to make something like a route, saying a particular host's mac supports an IP, and when the packets get there, a route there, or another arp lie, can get it delivered. I forget why we did not use a manual route! Maybe we wanted the routing protocol to think it decided everything!
FTP is a sub-protocol of TCP. TCP is one of 512 sub-protocols of IP, along with ICMP (ping and such) and UDP. IP is encapulated in Ethernet. Or more pragmatically, each layer has its own header. So if FTP s routing, TCP is routing. Routing is an IP level activity.
Last edited by DGPickett; 10-27-2010 at 01:03 PM..
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LEARN ABOUT MOJAVE
tc-route
Route classifier in tc(8) Linux Route classifier in tc(8)
NAME
route - route traffic control filter
SYNOPSIS
tc filter ... route [ from REALM | fromif TAG ] [ to REALM ] [ classid CLASSID ] [ action ACTION_SPEC ]
DESCRIPTION
Match packets based on routing table entries. This filter centers around the possibility to assign a realm to routing table entries. For
any packet to be classified by this filter, a routing table lookup is performed and the returned realm is used to decide on whether the
packet is a match or not.
OPTIONS
action ACTION_SPEC
Apply an action from the generic actions framework on matching packets.
classid CLASSID
Push matching packets into the class identified by CLASSID.
from REALM
fromif TAG
Perform source route lookups. TAG is the name of an interface which must be present on the system at the time of tc invocation.
to REALM
Match if normal (i.e., destination) routing returns the given REALM.
EXAMPLES
Consider the subnet 192.168.2.0/24 being attached to eth0:
ip route add 192.168.2.0/24 dev eth0 realm 2
The following route filter will then match packets from that subnet:
tc filter add ... route from 2 classid 1:2
and pass packets on to class 1:2.
NOTES
Due to implementation details, realm values must be in a range from 0 to 255, inclusive. Alternatively, a verbose name defined in
/etc/iproute2/rt_realms may be given instead.
SEE ALSO
tc(8), ip-route(8)
iproute2 21 Oct 2015 Route classifier in tc(8)