[OpenSIPS-Users] Public IP in REGISTER

Jehanzaib Younis jehanzaib.kiani at gmail.com
Sun Mar 8 23:34:26 EST 2020


Hi David,

I have one contact in the Usrloc
Do you think it could be a timeout issue? or i should use
remove_on_timeout_bflag option?

On Mon, Mar 9, 2020 at 12:31 PM David Villasmil <
david.villasmil.work at gmail.com> wrote:

> Make sure you don’t have 2 contacts
>
> On Sun, 8 Mar 2020 at 23:22, Jehanzaib Younis <jehanzaib.kiani at gmail.com>
> wrote:
>
>> but i have strange issue.
>> nathelper keep on sending the OPTION to old IP:PORT. As soon as the new
>> REGISTER comes in, it should only send the option to the latest one.
>> For example, I see OPTION going to xx.xxx.xx.xx:25001 and opensips keep
>> on sending to this after every 120 seconds (which is my setting)
>> The new register comes in and the  xx.xxx.xx.xx:25004 letsay and now
>> opensips sends to 25001 as well as 25004. Obviously my cpe only replies to
>> the latest one.
>>
>> Anyone have faced this issue ?
>>
>> Thank you
>>
>> On Fri, Mar 6, 2020 at 2:54 PM Jehanzaib Younis <
>> jehanzaib.kiani at gmail.com> wrote:
>>
>>> Thank you for your suggestions Diptesh,
>>>
>>> Actually adding modparam("nathelper", "received_avp", "$avp(s:rcv)") &
>>> modparam("registrar", "received_avp", "$avp(s:rcv)") did the trick.
>>>
>>>
>>>
>>> On Thu, Mar 5, 2020 at 7:25 PM Dipteshkumar Patel <
>>> diptesh.patel at ecosmob.com> wrote:
>>>
>>>> Hello Jehan,
>>>>
>>>> OpenSIPS handle NAT different way for INVITE and REGISTER packets. If
>>>> we use fix_nated_contact(), it will get the actual source ip from network
>>>> and create a lump for that and replace the headers(like Contact, Received
>>>> in Via and c parameter in SDP packet) just before sent out or relay the
>>>> packet.
>>>>
>>>> In your case, You need to manage the REGISTER and we are using OpenSIPS
>>>> as a Registrar so we are not relay the packet so fix_nated_contact() will
>>>> not help you. and your location table will have the private ip not public.
>>>> So Let me guide how NAT can be managed in Registration.
>>>>
>>>> There are three modules are responsible for the registration with NAT
>>>> handling.
>>>> 1. registrar module
>>>> 2. usrloc module
>>>> 3. nathelper module
>>>>
>>>> nathelper module can check the packet source is behind nat or nat and
>>>> get the public ip from source ip.
>>>>
>>>> We need to define a module parameter for netheper module with an
>>>> avp variable so the module will store the received IP in that avp. and
>>>> similar avp should be in registrar module so registrar module can read the
>>>> avp and store it into location as received parameter.
>>>>
>>>> modparam("nathelper", "received_avp", "$avp(received)")
>>>>
>>>> modparam("registrar", "received_avp", "$avp(received)")
>>>>
>>>>
>>>> Refer the following snippet.
>>>>
>>>> /*Other registrar Parameters*/
>>>> modparam("registrar", "received_avp", "$avp(received)")
>>>>
>>>> /*Other nethelper Parameters*/
>>>> modparam("nathelper", "received_avp", "$avp(received)") #keep in mind
>>>> that this avp should be same in registrar module.
>>>>
>>>> /*Other usrloc Parameters*/
>>>> modparam("usrloc", "nat_bflag", "NAT_FLAG")
>>>>
>>>> route(NAT_MANAGE);
>>>> -------
>>>> /*Some Authentication Stuff*/
>>>> -------
>>>> if(!save("location")) {
>>>>             sl_reply_error();
>>>> }
>>>>
>>>> route[NAT_MANAGE] {
>>>>     if(nat_uac_test("19")){
>>>>         xlog("L_INFO","--- [NAT_MANAGE] UAC IS BEHIND NAT ---");
>>>>         if(is_method("REGISTER")){
>>>>             fix_nated_register();
>>>>             setbflag(NAT_FLAG);
>>>>         } else {
>>>>             fix_nated_contact();
>>>>             setflag(NAT_FLAG);
>>>>             if (has_body("application/sdp")){
>>>>                 fix_nated_sdp("3");
>>>>             }
>>>>         }
>>>>     }
>>>> }
>>>>
>>>> Output of opensipsctl ul show
>>>> -----------------------------------------------
>>>>
>>>> AOR:: 100 at world.provider.in
>>>>     Contact:: sip:100@[ACTUAL CONTACT IP]:5060 Q=
>>>>             ContactID:: 2522655082190201667
>>>>             Expires:: 2219
>>>>             Callid:: 18480129104911-28121824031899 at 192.168.30.238
>>>>             Cseq:: 6
>>>>             User-agent:: Phone Ver2.2
>>>>             Received:: sip:[RECEIVED IP]:5060 /*This IP will be used as
>>>> request domain on relay the packet*/
>>>>             State:: CS_SYNC
>>>>             Flags:: 0
>>>>             Cflags:: SIPPING_RTO SIPPING_ENABLE NAT_FLAG
>>>>             Socket:: udp:[OPENSIPS LISTEN SOCKET]:5070
>>>>             Methods:: 7551
>>>>
>>>> I hope this will solve your problem.
>>>>
>>>> Thanks & Regards
>>>> *Diptesh Patel*
>>>> Software Developer
>>>> Ecosmob Technologies Ltd,
>>>> Ahmedabad
>>>> Mo:*+919898962659*
>>>>
>>>>
>>>> On Thu, Mar 5, 2020 at 4:35 AM Jehanzaib Younis <
>>>> jehanzaib.kiani at gmail.com> wrote:
>>>>
>>>>> Thank you for your email Callum,
>>>>> I can not see the public IP in the command line that is strange. but
>>>>> OPTION is working fine. i can see 200 OK in the OPTION.
>>>>> I have already tried what you have suggested i.e fixed_nated_contact
>>>>> on INVITE it is still sending to my 10.xx.xx.xx ip.
>>>>>
>>>>> Here is my URL location
>>>>> AOR:: xxxxxx
>>>>>         Contact:: sip:xxx at 10.202.128.xx:5060;transport=udp Q=
>>>>>                 Expires:: 2914
>>>>>                 Callid:: n883832msp1lm0nl3cmjks88jkpinsc0 at 10.202.128.xx
>>>>>                 Cseq:: 12
>>>>>                 User-agent:: HUAWEI-EchoLife HG8240H/V3R013C10S108
>>>>>                 State:: CS_NEW
>>>>>                 Flags:: 0
>>>>>                 Cflags:: 3
>>>>>                 Socket:: udp:mysipserverip:5060
>>>>>                 Methods:: 8191
>>>>>
>>>>> here is my url and nat module parameters
>>>>>
>>>>> loadmodule "usrloc.so"
>>>>> modparam("usrloc", "nat_bflag", "NAT")
>>>>> modparam("usrloc", "db_mode",   0)
>>>>>
>>>>> loadmodule "nathelper.so"
>>>>> modparam("nathelper", "natping_interval", 120) # Ping interval 120 s
>>>>> modparam("nathelper", "ping_nated_only", 1)   # Ping only clients
>>>>> behind NAT
>>>>> modparam("nathelper", "sipping_method", "OPTIONS")
>>>>> modparam("nathelper", "sipping_from", "sip:pinger at mytestdomain.com")
>>>>> modparam("nathelper", "received_avp", "$avp(i:42)")
>>>>> modparam("nathelper", "sipping_bflag", 7)
>>>>>
>>>>> loadmodule "nat_traversal.so"
>>>>> modparam("nat_traversal", "keepalive_interval", 120)
>>>>> modparam("nat_traversal", "keepalive_method", "OPTIONS")
>>>>> modparam("nat_traversal", "keepalive_from", "
>>>>> sip:pinger at mytestdomain.com")
>>>>>
>>>>> Any suggestions please?
>>>>>
>>>>> Thank you
>>>>>
>>>>>
>>>>> On Wed, Mar 4, 2020 at 9:50 PM Callum Guy <callum.guy at x-on.co.uk>
>>>>> wrote:
>>>>>
>>>>>> Hi Jehan,
>>>>>>
>>>>>> Sounds like you want to be using fix_nated_contact() - when the
>>>>>> INVITE arrives you can try the following:
>>>>>>
>>>>>> # Check if contact is RFC1918
>>>>>> if (nat_uac_test(1)) {
>>>>>>     # Replace the contact IP with the received address from the
>>>>>> network
>>>>>>     fix_nated_contact();
>>>>>> }
>>>>>>
>>>>>> If you look at the registrations via CLI or database (if in use)
>>>>>> you'll see that OpenSIPs is tracking both a contact and received value to
>>>>>> deal with this - that will be where your NAT pings are getting the address
>>>>>> from.
>>>>>>
>>>>>> Hopefully that helps to get you on the correct path!
>>>>>>
>>>>>> Callum
>>>>>>
>>>>>> On Tue, 3 Mar 2020 at 21:06, Jehanzaib Younis <
>>>>>> jehanzaib.kiani at gmail.com> wrote:
>>>>>>
>>>>>>> Hi gang,
>>>>>>>
>>>>>>> I have quite strange issue. When in some cases when my customer's
>>>>>>> have 10.202.128.xx range they are behind NAT. when i see opensipsctl ul
>>>>>>> show number at sip
>>>>>>> i see contact header as Contact:: sip:number at 10.202.128.xx:5060;transport=udp
>>>>>>> Q=
>>>>>>> which means when i try to relay the invite goes to that
>>>>>>> 10.202.128.xx:5060 which is wrong. It should go to its public IP:port
>>>>>>>
>>>>>>> but weird thing is, i see the OPTION is sent to its Public IP
>>>>>>> (OPTIONS sip:180.xx.xx.xx:1502). I also see the 200 OK which is perfect.
>>>>>>>
>>>>>>> I tried to use fix_nated_register(); but it does not change
>>>>>>> anything.
>>>>>>>
>>>>>>> Can anyone help please?
>>>>>>>
>>>>>>> Thank you
>>>>>>>
>>>>>>>
>>>>>>> Regards,
>>>>>>> Jehan
>>>>>>> _______________________________________________
>>>>>>> Users mailing list
>>>>>>> Users at lists.opensips.org
>>>>>>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>>>>>>
>>>>>>
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>>>
>>> --
>>> Regards,
>>> Jehanzaib
>>>
>>
>>
>> --
>> Regards,
>> Jehanzaib
>> _______________________________________________
>> Users mailing list
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>>
> --
> Regards,
>
> David Villasmil
> email: david.villasmil.work at gmail.com
> phone: +34669448337
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-- 
Regards,
Jehanzaib
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