diff --git a/server/routers/siteResource/createSiteResource.ts b/server/routers/siteResource/createSiteResource.ts
index f2e343cd..d2bb1665 100644
--- a/server/routers/siteResource/createSiteResource.ts
+++ b/server/routers/siteResource/createSiteResource.ts
@@ -39,8 +39,8 @@ const createSiteResourceSchema = z
         alias: z
             .string()
             .regex(
-                /^(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?$/,
-                "Alias must be a fully qualified domain name (e.g., example.com)"
+                /^(?:[a-zA-Z0-9*?](?:[a-zA-Z0-9*?-]{0,61}[a-zA-Z0-9*?])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?$/,
+                "Alias must be a fully qualified domain name with optional wildcards (e.g., example.com, *.example.com, host-0?.example.internal)"
             )
             .optional(),
         userIds: z.array(z.string()),
diff --git a/server/routers/siteResource/updateSiteResource.ts b/server/routers/siteResource/updateSiteResource.ts
index 376d9c0a..17a4033e 100644
--- a/server/routers/siteResource/updateSiteResource.ts
+++ b/server/routers/siteResource/updateSiteResource.ts
@@ -50,8 +50,8 @@ const updateSiteResourceSchema = z
         alias: z
             .string()
             .regex(
-                /^(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?$/,
-                "Alias must be a fully qualified domain name (e.g., example.internal)"
+                /^(?:[a-zA-Z0-9*?](?:[a-zA-Z0-9*?-]{0,61}[a-zA-Z0-9*?])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?$/,
+                "Alias must be a fully qualified domain name with optional wildcards (e.g., example.internal, *.example.internal, host-0?.example.internal)"
             )
             .nullish(),
         userIds: z.array(z.string()),