tcp: add tcp_syncookies mode to allow unconditionally generation of syncookies

[~andy/linux] / Documentation / networking / ip-sysctl.txt

diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 53cea9bcb14c8a55953b8b6938be537106b6ffea..36be26b2ef7af81407771420e3e146099bf6b468 100644 (file)
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -440,6 +440,10 @@ tcp_syncookies - BOOLEAN
        SYN flood warnings in logs not being really flooded, your server
        is seriously misconfigured.
 
+       If you want to test which effects syncookies have to your
+       network connections you can set this knob to 2 to enable
+       unconditionally generation of syncookies.
+
 tcp_fastopen - INTEGER
        Enable TCP Fast Open feature (draft-ietf-tcpm-fastopen) to send data
        in the opening SYN packet. To use this feature, the client application