Prevent TCP Split Handshake Session Establishment
You can configure a TCP Split Handshake Drop in a Zone Protection profile to prevent TCP sessions from being established unless they use the standard three-way handshake. This task assumes that you assigned a security zone for the interface where you want to prevent TCP split handshakes from establishing a session.
- Configure a Zone Protection profile to prevent
TCP sessions that use anything other than a three-way handshake
to establish a session.
- Select NetworkNetwork ProfilesZone Protection and Add a new profile (or select an existing profile).
- If creating a new profile, enter a Name for the profile and an optional Description.
- Select Packet Based Attack ProtectionTCP Drop and select Split Handshake.
- Click OK.
- Apply the profile to one or more security zones.
- Select NetworkZones and select the zone where you want to assign the zone protection profile.
- In the Zone window, from the Zone Protection
Profile drop-down, select the profile you configured
in the previous step.Alternatively, you could start creating a new profile here by clicking Zone Protection Profile, in which case you would continue accordingly.
- Click OK.
- (Optional) Repeat steps 1-3 to apply the profile to additional zones.
- Commit your changes.Click OK and Commit.
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