diff --git a/README.md b/README.md
index 6b18506..f2b1e01 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,13 @@
 # harasho
 
 A 'good' LLSIFAC (or LLSIFASA) server emulator for a certain arcade machine.
+
+# /etc/hosts
+```
+localhost cert.nesys.jp
+localhost cert3.nesys.jp
+localhost data.nesys.jp
+localhost proxy.nesys.jp
+localhost nesys.taito.co.jp
+localhost fjm170920zero.nesica.net
+```