14 Jun
2008
14 Jun
'08
10:38 a.m.
Hi,
I am using .nat_uac_test to detect if the UA is from behind a NAT and if so
use rtpproxy. However, if both UA are behind the "same" NAT, is there
anyway to tell? If both UAs are from the same LAN then I don't need to
apply rtpproxy.
What would be a good way to do that?
Any suggestion will be greatly appreciated.
Regards,
Pete
14 Jun
14 Jun
10:55 a.m.
New subject: [OpenSER-Users] How to detect if both UAs are from the same LAN
Pete Kay writes:
I am using .nat_uac_test to detect if the UA is from
behind a NAT and if so
use rtpproxy. However, if both UA are behind the "same" NAT, is there
anyway to tell?
it is hard, because two UAs may be behind the same NAT, but the other
may be behind yet another NAT.
-- juha
1:28 p.m.
El Sábado, 14 de Junio de 2008 08:55, Juha Heinanen escribió:
Pete Kay writes:
Uff .. double nat situations are not very common ... but yes it could happens,
the same solution when only one level of nat and behind the same "final" NAT
could be applied and solve it.
--
Saludos.
Raúl Alexis Betancor Santana
Dimensión Virtual S.L.
I am using .nat_uac_test to detect if the UA is
from behind a NAT and if
so use rtpproxy. However, if both UA are behind the "same" NAT, is
there anyway to tell?
it is hard, because two UAs may be behind the same NAT, but the other
may be behind yet another NAT.
-- juha
1:38 p.m.
Raúl Alexis Betancor Santana writes:
Uff .. double nat situations are not very common ...
but yes it could
happens,
actually double nat is quite common. one can have dsl subscription
where nat is done in the modem and wlan ap behind it that does another
nat. or gprs internet access where operator gives nated address and
another nat box at customer premise.
-- juha
4:03 p.m.
El Sábado, 14 de Junio de 2008 11:38, Juha Heinanen escribió:
Raúl Alexis Betancor Santana writes:
Only the second case could be common, the first one you mention (and AP doing
a second nat inside the same network) I consider it a faulty desing of a
network, if you have AP's in your network, you are not forced to put them to
work as a NAT router, but that is another question.
Coming to the original theme, it is possible to solve the problem of two UAC
behind the same NAT no matter if there are one, two or 1 millon NAT's behind
the first one.
It's obvious that the simplest solution it's to alway force RTPproxy use in
case of nat, but you could also test if both UAC are behind the same NAT
(first level of ..) and don't send them to RTPProxy, because on 99% of times,
they could reach eachother.
--
Saludos.
Raúl Alexis Betancor Santana
Dimensión Virtual S.L.
Uff .. double nat situations are not very common
... but yes it could
happens,
actually double nat is quite common. one can have dsl subscription
where nat is done in the modem and wlan ap behind it that does another
nat. or gprs internet access where operator gives nated address and
another nat box at customer premise.
4:32 p.m.
Hi,
So, specifically, how can I tell from the perspective of scripting the
openser.cfg whether the two UAs are behind the same NAT?
Thanks alot for your comments.
Regards,
Pete
5:08 p.m.
El Saturday 14 June 2008 14:32:54 Pete Kay escribió:
Hi,
So, specifically, how can I tell from the perspective of scripting the
openser.cfg whether the two UAs are behind the same NAT?
You only have to think about .. what they have in common if they are behind
the same NAT.
--
Raúl Alexis Betancor Santana
Dimensión Virtual S.L.
5:43 p.m.
hi use this link, it will give you clue for urs mail.
How to set up nathelper/rtpproxy when both SIP UA's are behind same
NAT<http://openser.org/dokuwiki/doku.php/examples:caller-callee-behind-s…
or
if use the avp modules,
by checking in location tables by using avp_db_query and avp check of
recieve parameter, this depends on UA's Client.
Thanks &Regards
Ravi Prakash Sunkara
VoIP Development Tech Lead
91-9999882776
2008/6/14 Pete Kay <petedao(a)gmail.com>om>:
Hi,
I am using .nat_uac_test to detect if the UA is from behind a NAT and if so
use rtpproxy. However, if both UA are behind the "same" NAT, is there
anyway to tell? If both UAs are from the same LAN then I don't need to
apply rtpproxy.
What would be a good way to do that?
Any suggestion will be greatly appreciated.
Regards,
Pete
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jh＠tutpro.com -
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Raúl Alexis Betancor Santana