reduce CPU usage by doing netflow samping in iptables
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@ -27,13 +27,13 @@ COMMIT
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*mangle
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:PREROUTING ACCEPT [0:0]
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{% for iface_name, iface_data in pillar['netbox']['interfaces'].items() %}{% if salt['pillar.get']('interfaces:'+iface_name+':netflow') %}
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-A PREROUTING -i {{ iface_name }} -j NFLOG --nflog-group 2 --nflog-size 64 --nflog-threshold 64
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-A PREROUTING -i {{ iface_name }} -m statistic --mode nth --packet 1 --every {{ salt['pillar.get']('netflow:sampling-rate',64) }} -j NFLOG --nflog-group 2 {% if salt['grains.get']('kernelrelease','') in ["4.19.52-amd64-vyos","4.19.84-amd64-vyos"] %}--nflog-range 64{% else %}--nflog-size 64{% endif %} --nflog-threshold 64
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{% endif %}{% endfor %}
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:INPUT ACCEPT [0:0]
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:FORWARD ACCEPT [0:0]
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:OUTPUT ACCEPT [0:0]
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:POSTROUTING ACCEPT [0:0]
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{% for iface_name, iface_data in pillar['netbox']['interfaces'].items() %}{% if salt['pillar.get']('interfaces:'+iface_name+':netflow') %}
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-A POSTROUTING -o {{ iface_name }} -j NFLOG --nflog-group 2 --nflog-size 64 --nflog-threshold 64
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-A POSTROUTING -o {{ iface_name }} -m statistic --mode nth --packet 1 --every {{ salt['pillar.get']('netflow:sampling-rate',64) }} -j NFLOG --nflog-group 2 {% if salt['grains.get']('kernelrelease','') in ["4.19.52-amd64-vyos","4.19.84-amd64-vyos"] %}--nflog-range 64{% else %}--nflog-size 64{% endif %} --nflog-threshold 64
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{% endif %}{% endfor %}
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COMMIT
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@ -27,13 +27,13 @@ COMMIT
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*mangle
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:PREROUTING ACCEPT [0:0]
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{% for iface_name, iface_data in pillar['netbox']['interfaces'].items() %}{% if salt['pillar.get']('interfaces:'+iface_name+':netflow') %}
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-A PREROUTING -i {{ iface_name }} -j NFLOG --nflog-group 2 --nflog-size 64 --nflog-threshold 64
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-A PREROUTING -i {{ iface_name }} -m statistic --mode nth --packet 1 --every {{ salt['pillar.get']('netflow:sampling-rate',64) }} -j NFLOG --nflog-group 2 {% if salt['grains.get']('kernelrelease','') in ["4.19.52-amd64-vyos","4.19.84-amd64-vyos"] %}--nflog-range 64{% else %}--nflog-size 64{% endif %} --nflog-threshold 64
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{% endif %}{% endfor %}
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:INPUT ACCEPT [0:0]
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:FORWARD ACCEPT [0:0]
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:OUTPUT ACCEPT [0:0]
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:POSTROUTING ACCEPT [0:0]
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{% for iface_name, iface_data in pillar['netbox']['interfaces'].items() %}{% if salt['pillar.get']('interfaces:'+iface_name+':netflow') %}
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-A POSTROUTING -o {{ iface_name }} -j NFLOG --nflog-group 2 --nflog-size 64 --nflog-threshold 64
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-A POSTROUTING -o {{ iface_name }} -m statistic --mode nth --packet 1 --every {{ salt['pillar.get']('netflow:sampling-rate',64) }} -j NFLOG --nflog-group 2 {% if salt['grains.get']('kernelrelease','') in ["4.19.52-amd64-vyos","4.19.84-amd64-vyos"] %}--nflog-range 64{% else %}--nflog-size 64{% endif %} --nflog-threshold 64
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{% endif %}{% endfor %}
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COMMIT
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@ -1332,7 +1332,7 @@ system {
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interface {{ iface_name }}
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{% endif %}{% endfor %}
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netflow {
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sampling-rate {{ pillar['netflow']['sampling-rate']}}
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sampling-rate 1
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{% for server in pillar['netflow']['servers'] %}
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server {{ server.split(":")[0] }} {
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port {{ server.split(":")[1] }}
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