ponte: modify internet-facing SSH port

1 files changed, 15 insertions, 0 deletions

diff --git a/krebs/1systems/ponte/config.nix b/krebs/1systems/ponte/config.nix
index f896c507b..2f55995cf 100644
--- a/krebs/1systems/ponte/config.nix
+++ b/krebs/1systems/ponte/config.nix
@@ -11,6 +11,21 @@
   networking.firewall.logRefusedConnections = false;
   networking.firewall.logRefusedUnicastsOnly = false;
 
+  # Move Internet-facing SSH port to reduce logspam.
+  networking.firewall.extraCommands = let
+    host = config.krebs.build.host;
+  in /* sh */ ''
+    iptables -t nat -A OUTPUT -o lo -p tcp --dport 11423 -j REDIRECT --to-ports 22
+    iptables -t nat -A PREROUTING -p tcp --dport 11423 -j REDIRECT --to-ports 22
+    iptables -t nat -A PREROUTING -d ${host.nets.retiolum.ip4.addr} -p tcp --dport 22 -j ACCEPT
+    iptables -t nat -A PREROUTING -p tcp --dport 22 -j REDIRECT --to-ports 0
+
+    ip6tables -t nat -A OUTPUT -o lo -p tcp --dport 11423 -j REDIRECT --to-ports 22
+    ip6tables -t nat -A PREROUTING -p tcp --dport 11423 -j REDIRECT --to-ports 22
+    ip6tables -t nat -A PREROUTING -d ${host.nets.retiolum.ip6.addr} -p tcp --dport 22 -j ACCEPT
+    ip6tables -t nat -A PREROUTING -p tcp --dport 22 -j REDIRECT --to-ports 0
+  '';
+
   krebs.build.host = config.krebs.hosts.ponte;
 
   krebs.pages.enable = true;