[SR-Users] DIAMETER based on TCP requires a FIXED I/S-CSCFSOURCE PORT in order to make Cx work towards a External HSS

[Daniel-Constantin Mierla]

Hello,

On 06/07/15 13:58, Jason Penton wrote:
> Hi Jan,
>
> This is not supported

I wrote in another recent message as well, it is not guaranteed you can
set the local port for tcp connections, due to the design of tcp
protocol. One can attempt, but restricting on that is not a sustainable
policy, at least for firewall rules.

Cheers,
Daniel


> but I have a question, what happens if you want to connect to multiple
> HSSs? Say for load balancing or failover (assuming no DRA)? Fixing the
> source port seems pretty restrictive to me ;)
>
> Cheers
> Jason
>
> On Mon, Jul 6, 2015 at 12:13 PM, Jan Devai <jan.devai at gmail.com
> <mailto:jan.devai at gmail.com>> wrote:
>
>
>     Hi experts,
>
>
>     from the current trace we can see that the I/S-CSCF always changes
>     SOURCE port when contacting our eternal HSS.
>
>     In order to make the Cx work HSS expects the Source port to be
>     fixed on the TCP layer and in our I/S-CSCF configuration we did
>     not find any setting for SOURCE Port.
>
>
>     Can somebody help us please ;-) ?
>
>
>     We appreciate your support,
>
>
>     Br,
>     Jan
>
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-- 
Daniel-Constantin Mierla
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