X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/2d58d8154ade6dd9b1cd8d01450ac0b7b53ab62a..f078f86ef3e6d0119845cdf8603b8174770cacc7:/test/scripts/4027-TFO-socks/4027

diff --git a/test/scripts/4027-TFO-socks/4027 b/test/scripts/4027-TFO-socks/4027
index 74045356f..a7412aecd 100644
--- 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
 #
 #