diff --git a/src/NetscriptFunctions.ts b/src/NetscriptFunctions.ts
index 623d50fac..228d1197b 100644
--- a/src/NetscriptFunctions.ts
+++ b/src/NetscriptFunctions.ts
@@ -1167,6 +1167,10 @@ export const ns: InternalAPI<NSFull> = {
       helpers.log(ctx, () => `Invalid argument: hostname='${hostnameStr}'`);
       return "";
     }
+    if (hostnameStr.startsWith("hacknet-node-") || hostnameStr.startsWith("hacknet-server-")) {
+      helpers.log(ctx, () => `Invalid argument: hostname='${hostnameStr}' is a reserved hostname.`);
+      return "";
+    }
 
     if (Player.purchasedServers.length >= getPurchaseServerLimit()) {
       helpers.log(
diff --git a/src/Server/ServerPurchases.ts b/src/Server/ServerPurchases.ts
index b25114f32..7f0b8e8e6 100644
--- a/src/Server/ServerPurchases.ts
+++ b/src/Server/ServerPurchases.ts
@@ -65,6 +65,9 @@ export const renamePurchasedServer = (hostname: string, newName: string): void =
   if (!server) throw new Error(`Server '${hostname}' doesn't exists.`);
   if (GetServer(newName)) throw new Error(`Server '${newName}' already exists.`);
   if (!Player.purchasedServers.includes(hostname)) throw new Error(`Server '${hostname}' is not a player server.`);
+  if (newName.startsWith("hacknet-node-") || newName.startsWith("hacknet-server-")) {
+    throw new Error(`'${newName}' is a reserved hostname.`);
+  }
   const replace = (arr: string[], old: string, next: string): string[] => {
     return arr.map((v) => (v === old ? next : v));
   };
@@ -122,6 +125,11 @@ export function purchaseServer(hostname: string, ram: number, cost: number): voi
     return;
   }
 
+  if (hostname.startsWith("hacknet-node-") || hostname.startsWith("hacknet-server-")) {
+    dialogBoxCreate(`'${hostname}' is a reserved hostname, please try again.`);
+    return;
+  }
+
   // Create server
   const newServ = safelyCreateUniqueServer({
     adminRights: true,