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int_if="ral0"
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ext_if="tun0"
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sip_ip="192.168.0.5"
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scrub in all
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altq on $ext_if priq queue { std, voip }
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queue std priority 0 priq(default red)
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queue voip priority 1 priq(red)
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nat on $ext_if from $int_if -> ($ext_if:0)
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rdr on $ext_if proto { tcp, udp } to port 5060 -> $sip_ip
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pass quick on lo0
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block in on $ext_if
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pass quick on $int_if
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pass out on $ext_if keep state queue std
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pass out on $ext_if proto { tcp, udp } from $sip_ip port 5060 \
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keep state queue voip
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pass in on $ext_if proto { tcp, udp } from $sip_ip port 5060 \
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keep state queue voip
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