diff --git a/yt_downloader/vpn.py b/yt_downloader/vpn.py
index 626ae77..ab808cc 100644
--- a/yt_downloader/vpn.py
+++ b/yt_downloader/vpn.py
@@ -255,6 +255,10 @@ def _diagnose(cfg) -> str:
         ("wg", ["ip", "netns", "exec", ns, "wg", "show", iface]),
         ("routes", ["ip", "netns", "exec", ns, "ip", "route", "show", "default"]),
         ("rules", ["ip", "netns", "exec", ns, "ip", "rule", "show"]),
+        ("host wg interfaces", ["sh", "-c",
+                                "for i in $(wg show interfaces 2>/dev/null); do "
+                                "echo \"== $i ==\"; wg show $i public-key 2>/dev/null; done"]),
+        ("host NAT", ["iptables", "-t", "nat", "-L", "POSTROUTING", "-n", "-v"]),
     ):
         rc, out = _sudo_out(args)
         parts.append(f"--- {title} ---\n{out or '(none)'}")