Ok, I try... summarizing I wanna know what Is the correct way to set a rule
in a whole network: the IP address of network AND with only netmask 32 for
example 10.0.1.0/32 or the IP address of network with another mask for
example 10.0.1.0/25? In this case apply the same concept of wildcarding
off of protocol??
Regards
Juan
El 2 mar. 2017 1:38 AM, "Iwase Yusuke" <[email protected]> escribió:
> Hi Juan,
>
> Well... rest_firewall is just a sample application for the Ryu-Book, it is
> supposed to be calculated
> manually by users, I guess...
>
> For just applying IP network mask, you can use "netaddr" though.
> >>> import netaddr
> >>> str(netaddr.IPNetwork("192.168.0.1/24").network)
> '192.168.0.0'
>
>
> Thanks,
> Iwase
>
> On 2017年03月02日 15:25, Juan Francisco Guano wrote:
> > Hi Iwase, thank you so much... Another question Do you know any resource
> of a wildcard calculator that could works With the rest firewall?, for
> example for define a range of IP address in a network to accept o deny
> traffic?
> >
> > Regards
> >
> > Juab
> >
> > El 2 mar. 2017 12:35 AM, "Iwase Yusuke" <[email protected]
> <mailto:[email protected]>> escribió:
> >
> > Hi Juan,
> >
> > Sorry, I misunderstood.
> >
> > I guess, it comes from the constraint of OpenFlow Matching rule.
> > If you specify nw_dst="10.0.0.1/24 <http://10.0.0.1/24>", this
> means:
> > "The high-order 24 bits are used for IP address matching and other
> is wildcarded"
> > and does NOT mean:
> > "Matching to the destination 10.0.0.1 address in the 10.0.0.0/24 <
> http://10.0.0.0/24> network"
> > These are very similar, but strictly speaking these does not have
> the same meaning.
> > Please refer to "7.2.3.4 Flow Matching" in OpenFlow Spec 1.3 for
> details.
> >
> > e.g.)
> > With nw_dst="10.0.0.1/24 <http://10.0.0.1/24>", this rule will be
> translated to "10.0.0.*" (* means wildcarded).
> > packets to 10.0.0.2 <http://10.0.0.2>: MATCH
> > packets to 10.1.0.1 <http://10.1.0.1>: NOT MATCH
> >
> > If you want to distinguish the packets only which have "10.0.0.1" in
> "10.0.0.0/24 <http://10.0.0.0/24>" network
> > as the destination, you need to set nw_dst="10.0.0.1/32 <
> http://10.0.0.1/32>" in OpenFlow match field.
> > 32 means the exact match for "10.0.0.1" address.
> >
> > Thanks,
> > Iwase
> >
> > On 2017年03月01日 20:32, Juan Francisco Guano wrote:
> > > Hi Iwase, thank you so much by your reply... I know that
> 255.000.000.00 Is same "8" for format. Now if you check my original
> question , you can appreciate that I así for an specific IP address "
> 10.0.0.2/8 <http://10.0.0.2/8> <http://10.0.0.2/8> " why Is the same in
> flow that "10.0.0.3/8 <http://10.0.0.3/8> <http://10.0.0.3/8>" rule in a
> switch(I check this with dump-flows command and I get 10.0.0.0/255.0.0.0
> <http://10.0.0.0/255.0.0.0> <http://10.0.0.0/255.0.0.0> in both case )?
> How the controller/switch distinguish this flows? Why the flows are
> replace it in the switch? Why with a netmask 32 the flows/rules are
> different? Is it possible that this case Is linked with wildcarding
> function un the app?
> > >
> > > Any help Is welcome...
> > >
> > > Regards
> > >
> > > Juan
> > >
> > > El 1 mar. 2017 2:58 AM, "Iwase Yusuke" <[email protected]
> <mailto:[email protected]> <mailto:[email protected] <mailto:
> [email protected]>>> escribió:
> > >
> > > Hi Juan,
> > >
> > > First, "255.0.0.0" in "10.0.0.0/255.0.0.0 <
> http://10.0.0.0/255.0.0.0> <http://10.0.0.0/255.0.0.0>" means the subnet
> mask and has the same meaning with "8".
> > > "8" is just formatted in the prefix representation.
> > >
> > > And, when your get without the mask, like "10.0.0.0", the
> subnet mask "255.255.255.0"(="32" in
> > > the prefix representation) is just omitted for the readability.
> > > So, you can set the netmask other than 32.
> > >
> > > Thanks,
> > > Iwase
> > >
> > > On 2017年03月01日 15:54, Juan Francisco Guano wrote:
> > > > Hi everybody
> > > >
> > > > I know, if this value is correct when I set a rule in a REST
> FIREWALL, this directly linked with the netmask, if I set a rule for the IP
> Address and your netmask ;10.0.0.2/8 <http://10.0.0.2/8> <
> http://10.0.0.2/8> <http://10.0.0.2/8>, when I get the rules the IP
> address is the below; .... "nw_dst": "10.0.0.0/255.0.0.0 <
> http://10.0.0.0/255.0.0.0> <http://10.0.0.0/255.0.0.0> <
> http://10.0.0.0/255.0.0.0>".... what is the meaning of that? I cant set
> any rule with a different netmask of 32? for example I set the rule for
> the IP Address and your netmask ;10.0.0.1/32 <http://10.0.0.1/32> <
> http://10.0.0.1/32> <http://10.0.0.1/32> and I get a rule without any
> mask;.... "nw_dst": "10.0.0.1"....
> > > > Please any explanation is welcome..
> > > >
> > > > Regards
> > > >
> > > > Juan
> > > >
> > > >
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