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Thread-Topic: [DISCUSS] Why we MARK packets? 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All, I could not find any history around 'why' we MARK or CONNMARK packets in ma= ngle table in VRs? I found an issue in case of VPCs where `MARK` iptable ru= les failed hair-pin nat (as described in this PR: https://github.com/apache= /cloudstack/pull/2514) The valid usage I found was wrt VPN_STATS, however, the usage is not export= ed at all, it is commented: https://github.com/apache/cloudstack/blob/master/systemvm/debian/opt/cloud/= bin/vpc_netusage.sh#L141 Other than for debugging purposes in the VR, marking packets and connection= s I could not find any valid use. Please do share if you're using marked pa= ckets (such as VPN ones etc) outside of VR scope? I propose we remove MARK on packets which is cpu intensive and slows the tr= affic (a bit), instead CONNMARK can still be used to mark connections and d= ebug VRs without actually changing the packet marking permanently. Thoughts= ? - Rohit rohit.yadav@shapeblue.com=A0 www.shapeblue.com 53 Chandos Place, Covent Garden, London WC2N 4HSUK @shapeblue =20 =20 --_000_HE1PR07MB349813C80274AE356D57BA91E9B60HE1PR07MB3498eurp_--