add proxy note

1 files changed, 11 insertions, 0 deletions

diff --git a/README.md b/README.md
index bea978a..b0b1ec8 100644
--- a/README.md
+++ b/README.md
@@ -55,6 +55,17 @@ Any other unsupported option or no options will print a usage message.
 Returns 0 on success or 1 on failure. Failure message returns the exact error
 from dyn.dns.he.net, no more and no less.
 
+# Note on Proxies
+If you have curl(1) configured at a system or user profile level to use a
+proxy or be proxy aware, this script will likely produce undesired results.
+You must do one of two things:
+
+1) Configure the environment this script runs in to suppress proxy configuration
+
+2) Use the -a and -A flags to set the IP addresses manually
+
+Otherwise, the HE DNS service will auto-detect the proxy address and not the host address.
+
 # Usage
 This script is designed to be called from a Cron entry or another script. An
 example usage: