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Kernel and Embedded Linux
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pass in proto tcp from { 1.2.3.4, 1.2.3.5 } to any label \ "$nr:$if:$proto:$srcaddr:$srcport:$dstaddr:$dstport" pass in on lo0 proto tcp from { 1.2.3.4, 1.2.3.5 } to any label \ "$nr:$if:$proto:$srcaddr:$srcport:$dstaddr:$dstport"