Added warning to PF kill switch guide
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@ -47,6 +47,8 @@ Status: Enabled
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### Step 3: backup and override `/etc/pf.conf`
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### Step 3: backup and override `/etc/pf.conf`
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> Heads up: software updates will likely restore `/etc/pf.conf` to default. Remember to check `/etc/pf.conf` using `cat /etc/pf.conf` after updates and test kill switch.
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```shell
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```shell
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sudo cp /etc/pf.conf /etc/pf.conf.backup
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sudo cp /etc/pf.conf /etc/pf.conf.backup
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cat << "EOF" | sudo tee /etc/pf.conf
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cat << "EOF" | sudo tee /etc/pf.conf
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