diff --git a/blog/_posts/2015-06-12-ufw.md b/blog/_posts/2015-06-12-ufw.md
index a4bf5df..511d977 100644
--- a/blog/_posts/2015-06-12-ufw.md
+++ b/blog/_posts/2015-06-12-ufw.md
@@ -91,6 +91,18 @@ ufw allow from fe80::/10 to any port 1714:1764 proto tcp
 ufw allow from fe80::/10 to any port 1714:1764 proto udp
 ```
 
+EXTRA:
+
+If you need WLAN tethering, edit `/etc/ufw/sysctl.conf` and:
+
+```
+ufw route allow in on enp3s0 out on wlp2s0
+ufw route allow in on wlp2s0 out on enp3s0
+```
+
+I am not sure if both rules are required, enp3s0 is the ethernet interface
+and wlp2s0 the wireless one. I think it would make sense for only the first
+to be required.
 
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