Asterisk + pfsense, Some calls dropped after 30 sec

  • Hi all,

    I have a NAT Issue for my Asterisk behind my pfsense, i have checked all old related posts, but none helped me.
    I have 4 SIP provider and without pfsense just with NAT in router config everything works fine.
    and below my config:
    my subnet ( use Pfsense WAN address for internet 196.X.X.11

    my asterisk ( is natted through pfsense with VIP 196.X.X.10
      1:1 NAT  196.X.X.10 –
      Manual Outbound: --- to any -- 196.X.X.10 with dynamic port.

    on WAN Interface rules no restriction to
    on Server Interface rules no restriction for

    with firewall optimization set to Normal: I get the issue of one way audio
    with firewall optimization set to Conservative:  some call work fine and some dropped after 30 sec

    Need your Help Please.

  • Issue solved

    Problem related to SIP ALG in the router which must be disabled.

    in my case i have a cisco router, so I entred:
    #no ip nat service sip tcp port 5060
    #no ip nat service sip udp port 5060
    and everything started working as expected.

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