diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2a342ee3..b2b602aa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## 3.0.36 - 2024-02-25
+
+- BigInteger: put guardrails on isPrime() and randomPrime() (CVE-2024-27354)
+- ASN1: limit OID length (CVE-2024-27355)
+- EC: when using openssl to do signing use unencrypted key (#1979)
+- SSH2: add different options to isConnected() (#1983)
+
 ## 3.0.35 - 2023-12-18
 
 - SSH2: implement terrapin attack countermeasures (#1972)
@@ -237,6 +244,12 @@
   - Salsa20 / ChaCha20
 - namespace changed from `phpseclib\` to `\phpseclib3` to facilitate phpseclib 2 shim (phpseclib2_compat)
 
+## 2.0.47 - 2024-02-25
+
+- BigInteger: add getLength() and getLengthInBytes() methods
+- BigInteger: put guardrails on isPrime() and randomPrime() (CVE-2024-27354)
+- ASN1: limit OID length (CVE-2024-27355)
+
 ## 2.0.46 - 2023-12-28
 
 - SSH2: implement terrapin attack countermeasures (#1972)
@@ -603,6 +616,12 @@
 - Classes were renamed and namespaced ([#243](https://github.com/phpseclib/phpseclib/issues/243))
 - The use of an autoloader is now required (e.g. Composer)
 
+## 1.0.23 - 2024-02-25
+
+- BigInteger: add getLength() and getLengthInBytes() methods
+- BigInteger: put guardrails on isPrime() and randomPrime() (CVE-2024-27354)
+- ASN1: limit OID length (CVE-2024-27355)
+
 ## 1.0.22 - 2023-12-28
 
 - SFTP: fix issue with get() downloading to files / streams (#1934)
diff --git a/README.md b/README.md
index c4b27147..7166bafe 100644
--- a/README.md
+++ b/README.md
@@ -51,7 +51,7 @@ SSH-2, SFTP, X.509, an arbitrary-precision integer arithmetic library, Ed25519 /
 * PHP4 compatible
 * Composer compatible (PSR-0 autoloading)
 * Install using Composer: `composer require phpseclib/phpseclib:~1.0`
-* [Download 1.0.22 as ZIP](http://sourceforge.net/projects/phpseclib/files/phpseclib1.0.22.zip/download)
+* [Download 1.0.23 as ZIP](http://sourceforge.net/projects/phpseclib/files/phpseclib1.0.23.zip/download)
 
 ## Security contact information
 
diff --git a/phpseclib/Net/SSH2.php b/phpseclib/Net/SSH2.php
index dfe7a39d..e977e2ff 100644
--- a/phpseclib/Net/SSH2.php
+++ b/phpseclib/Net/SSH2.php
@@ -3023,9 +3023,39 @@ class SSH2
     /**
      * Is the connection still active?
      */
-    public function isConnected(): bool
+     *
+     * $level has 3x possible values:
+     * 0 (default): phpseclib takes a passive approach to see if the connection is still active by calling feof()
+     *    on the socket
+     * 1: phpseclib takes an active approach to see if the connection is still active by sending an SSH_MSG_IGNORE
+     *    packet that doesn't require a response
+     * 2: phpseclib takes an active approach to see if the connection is still active by sending an SSH_MSG_CHANNEL_OPEN
+     *    packet and imediately trying to close that channel. some routers, in particular, however, will only let you
+     *    open one channel, so this approach could yield false positives
+     *
+     * @param int $level
+     * @return bool
+     */
+    public function isConnected(int $level = 0): bool
     {
-        return ($this->bitmap & self::MASK_CONNECTED) && is_resource($this->fsock) && !feof($this->fsock);
+        if ($level < 0 || $level > 2) {
+            throw new InvalidArgumentException('$level must be 0, 1 or 2');
+        }
+
+        if ($level == 0) {
+            return ($this->bitmap & self::MASK_CONNECTED) && is_resource($this->fsock) && !feof($this->fsock);
+        }
+        try {
+            if ($level == 1) {
+                $this->send_binary_packet(pack('CN', NET_SSH2_MSG_IGNORE, 0));
+            } else {
+                $this->openChannel(self::CHANNEL_KEEP_ALIVE);
+                $this->close_channel(self::CHANNEL_KEEP_ALIVE);
+            }
+            return true;
+        } catch (\Exception $e) {
+            return false;
+        }
     }
 
     /**