Hello,ycaner!
Thanks for your advice!
I searched nat_traversal in kamailio.cfg in PCSCF module, and found that I should define WITH_NATPING.
After doing this, a new problem came. What does this line mean? What should I configure to replace "sip:keepalive@HOSTNAME" ? Is this HOSTNAME a turn/stun server?
modparam("nat_traversal", "keepalive_from", *"sip:keepalive@HOSTNAME"*)
#!ifdef WITH_NATPING # ----- nat_traversal params ----- # If another keepalive is wanted, this is the place modparam("nat_traversal", "keepalive_interval", 20) # If another method than NOTIFY is wanted: modparam("nat_traversal", "keepalive_method", "OPTIONS") # From? modparam("nat_traversal", "keepalive_from", "sip:keepalive@HOSTNAME") # Where we store information about keep-alives: modparam("nat_traversal", "keepalive_state_file", "/var/run/kamailio/keepalive_state") #!endif
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