ip firewall nat add action=masquerade chain=srcnat connection-mark=domain. ip firewall nat add action=dst-nat chain=dstnat connection-mark=-forward to-addresses=10.0.0.1 ip firewall mangle add chain=prerouting dst-address=192.168.0.1 layer7-protocol= action=mark-connection new-connection-mark=-forward protocol=udp dst-port=53 ip firewall mangle add chain=prerouting dst-address=192.168.0.1 layer7-protocol= action=mark-connection new-connection-mark=-forward protocol=tcp dst-port=53 I would like to know now to manage bandwidth youtube with layer7, this is detail as below. ip firewall layer7-protocol add name= regexp= 10.0.0.1: dns server that serve queries for.ip firewall layer7-protocol add name Extension. : domain that need conditional dns forwarding First, we create filtering regex content L7, specify the string we are looking for.192.168.0.1: LAN IP of Mikrotik, configured as DNS server for local clients.The following layer 7 rule and nat will forward dns request for specific dns domain to specified dns server If the rule is set in the input/prerouting chain then the same rule must be also set in the output/postrouting chain, otherwise, the collected data may not be complete resulting in an incorrectly matched pattern.Mikrotik doesn’t have an official way to configure conditional DNS. To satisfy this requirement l7 rules should be set in forward chain.

To avoid this, add regular firewall matchers to reduce the amount of data passed to layer-7 filters repeatedly.Īn additional requirement is that the layer7 matcher must see both directions of traffic (incoming and outgoing). You should take into account that a lot of connections will significantly increase memory and CPU usage. Allocated memory is freed and the protocol is considered unknown. How to Block Twitter with 'Layer 7' or 'Content' or 'TLS' Block Twitter With 'Layer-7' /ip firewall layer7-protocol add name Twitter regexp '.+ (). If the pattern is not found in the collected data, the matcher stops inspecting further.

L7 matcher collects the first 10 packets of a connection or the first 2KB of a connection and searches for the pattern in the collected data. Use other features to block webpages by URL. This will almost never work correctly and your device will exhaust its resources, trying to catch all the traffic. It is not recommended to use the L7 matcher for generic traffic, such as for blocking webpages. Use this feature only for very specific traffic. The L7 matcher is very resource-intensive.

Layer7 mikrotik