diff --git a/server.js b/server.js
index 47d961c3b..4cda91ae8 100644
--- a/server.js
+++ b/server.js
@@ -9,7 +9,6 @@ import path from 'node:path';
 import util from 'node:util';
 import net from 'node:net';
 import dns from 'node:dns';
-import { promises as dnsPromise } from 'node:dns';
 import process from 'node:process';
 import { fileURLToPath } from 'node:url';
 
@@ -71,6 +70,7 @@ import {
     getSeparator,
     stringToBool,
     urlHostnameToIPv6,
+    canResolve,
 } from './src/util.js';
 import { UPLOADS_DIRECTORY } from './src/constants.js';
 import { ensureThumbnailCache } from './src/endpoints/thumbnails.js';
@@ -383,37 +383,6 @@ function getSessionCookieAge() {
     return undefined;
 }
 
-
-async function canResolve(name, useIPv6 = true, useIPv4 = true) {
-    try {
-        let v6Resolved = false;
-        let v4Resolved = false;
-
-        if (useIPv6) {
-            try {
-                await dnsPromise.resolve6(name);
-                v6Resolved = true;
-            } catch (error) {
-                v6Resolved = false;
-            }
-        }
-
-        if (useIPv4) {
-            try {
-                await dnsPromise.resolve(name);
-                v4Resolved = true;
-            } catch (error) {
-                v4Resolved = false;
-            }
-        }
-
-        return v6Resolved || v4Resolved;
-
-    } catch (error) {
-        return false;
-    }
-}
-
 async function getHasIP() {
     let hasIPv6 = false;
     let hasIPv6Local = false;
@@ -794,6 +763,8 @@ async function getAutorunHostname(useIPv6, useIPv4) {
  * Tasks that need to be run after the server starts listening.
  * @param {boolean} v6Failed If the server failed to start on IPv6
  * @param {boolean} v4Failed If the server failed to start on IPv4
+ * @param {boolean} useIPv6 If the server is using IPv6
+ * @param {boolean} useIPv4 If the server is using IPv4
  */
 const postSetupTasks = async function (v6Failed, v4Failed, useIPv6, useIPv4) {
     const autorunUrl = new URL(
diff --git a/src/util.js b/src/util.js
index b5034d248..c11de84e8 100644
--- a/src/util.js
+++ b/src/util.js
@@ -5,6 +5,7 @@ import process from 'node:process';
 import { Readable } from 'node:stream';
 import { createRequire } from 'node:module';
 import { Buffer } from 'node:buffer';
+import { promises as dnsPromise } from 'node:dns';
 
 import yaml from 'yaml';
 import { sync as commandExistsSync } from 'command-exists';
@@ -692,6 +693,10 @@ export function isValidUrl(url) {
     }
 }
 
+/**
+ * removes starting `[` or ending `]` from hostname.
+ * @param {string} hostname hostname to use
+ */
 export function urlHostnameToIPv6(hostname) {
     if (hostname.startsWith('[')) {
         hostname = hostname.slice(1);
@@ -702,6 +707,47 @@ export function urlHostnameToIPv6(hostname) {
     return hostname;
 }
 
+/**
+ * Test if can resolve a dns name.
+ * @param {string} name Domain name to use
+ * @param {boolean} useIPv6 If use IPv6
+ * @param {boolean} useIPv4 If use IPv4
+ */
+export async function canResolve(name, useIPv6 = true, useIPv4 = true) {
+    try {
+        let v6Resolved = false;
+        let v4Resolved = false;
+
+        if (useIPv6) {
+            try {
+                await dnsPromise.resolve6(name);
+                v6Resolved = true;
+            } catch (error) {
+                v6Resolved = false;
+            }
+        }
+
+        if (useIPv4) {
+            try {
+                await dnsPromise.resolve(name);
+                v4Resolved = true;
+            } catch (error) {
+                v4Resolved = false;
+            }
+        }
+
+        return v6Resolved || v4Resolved;
+
+    } catch (error) {
+        return false;
+    }
+}
+
+
+/**
+ * converts string to boolean accepts 'true' or 'false' else it returns the string put in
+ * @param {string} str Input string
+ */
 export function stringToBool(str) {
     if (str === 'true') return true;
     if (str === 'false') return false;