diff --git a/.bashrc.d/openssl b/.bashrc.d/openssl
new file mode 100644
index 0000000..11fd524
--- /dev/null
+++ b/.bashrc.d/openssl
@@ -0,0 +1 @@
+function cert-deets() { openssl s_client -connect "$1" 2>/dev/null <<< Q | openssl x509 -noout -subject -ext subjectAltName -dates; } && export -f cert-deets