[Serusers] Via-received mystery

[Jain, Hitesh]

HI Everyone,
                   I have two UA(Cisco 7960) behind a Linksys firewall
and a SER in the public domain. Both the phones can make calls to each
other and everything works great.But the mystery is when the invite or
register reaches the SER, the SER never recognizes the call as coming
behind a NAT, cause the condition in the ser.conf that  via!=received
fails because I cant see any received parameter in the via field. Hence
I guess setflag(6)(mark as nated) also fails. But the whole thing is my
calls are working fine.
          Is there something I am missing altogether? Hows is the whole
thing working?

Thanks,

Hitesh.
   
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