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[exim.git] / test / scripts / 4027-TFO-socks / 4027

diff --git a/test/scripts/4027-TFO-socks/4027 b/test/scripts/4027-TFO-socks/4027
index 74045356f6757a5cb2e336cd14e05833bca36293..a7412aecdab68d429c455180eeb4e1d3b4d2a427 100644 (file)
--- a/test/scripts/4027-TFO-socks/4027
+++ b/test/scripts/4027-TFO-socks/4027
@@ -1,5 +1,8 @@
 # socks5 proxy on smtp transport, TCP Fast Open
 #
+# NOTE: ensure that TFO is fully enabled in the kernel.
+# For linux: sysctl net.ipv4.tcp_fastopen=3
+# 
 munge loopback
 #
 #