Index: src/wp-includes/comment.php
===================================================================
--- src/wp-includes/comment.php	(revision 32691)
+++ src/wp-includes/comment.php	(working copy)
@@ -2304,9 +2304,18 @@
	$parent_status = ( 0 < $commentdata['comment_parent'] ) ? wp_get_comment_status($commentdata['comment_parent']) : '';
	$commentdata['comment_parent'] = ( 'approved' == $parent_status || 'unapproved' == $parent_status ) ? $commentdata['comment_parent'] : 0;

-	$commentdata['comment_author_IP'] = preg_replace( '/[^0-9a-fA-F:., ]/', '',$_SERVER['REMOTE_ADDR'] );
-	$commentdata['comment_agent']     = isset( $_SERVER['HTTP_USER_AGENT'] ) ? substr( $_SERVER['HTTP_USER_AGENT'], 0, 254 ) : '';
+	if ( isset( $commentdata['comment_author_IP'] ) ) {
+		$commentdata['comment_author_IP'] = preg_replace( '/[^0-9a-fA-F:., ]/', '', $commentdata['comment_author_IP'] );
+	} else {
+		$commentdata['comment_author_IP'] = preg_replace( '/[^0-9a-fA-F:., ]/', '', $_SERVER['REMOTE_ADDR'] );
+	}

+	if ( isset( $commentdata['comment_agent'] ) ) {
+		$commentdata['comment_agent'] = substr( $commentdata['comment_agent'], 0, 254 );
+	} else {
+		$commentdata['comment_agent'] = isset( $_SERVER['HTTP_USER_AGENT'] ) ? substr( $_SERVER['HTTP_USER_AGENT'], 0, 254 ) : '';
+	}
+
	if ( empty( $commentdata['comment_date'] ) ) {
		$commentdata['comment_date'] = current_time('mysql');
	}
Index: tests/phpunit/tests/comment.php
===================================================================
--- tests/phpunit/tests/comment.php	(revision 32691)
+++ tests/phpunit/tests/comment.php	(working copy)
@@ -113,6 +113,130 @@
		}
	}

+	/**
+	 * @ticket 14601
+	 */
+	public function test_wp_new_comment_respects_author_ip() {
+		$u = $this->factory->user->create();
+		$post_id = $this->factory->post->create( array( 'post_author' => $u ) );
+
+		$data = array(
+			'comment_post_ID'      => $post_id,
+			'comment_author'       => rand_str(),
+			'comment_author_IP'    => '192.168.1.1',
+			'comment_author_url'   => '',
+			'comment_author_email' => '',
+			'comment_type'         => '',
+			'comment_content'      => rand_str(),
+		);
+
+		$id = wp_new_comment( $data );
+
+		$comment = get_comment( $id );
+
+		$this->assertEquals( $data['comment_author_IP'], $comment->comment_author_IP );
+	}
+
+	/**
+	 * @ticket 14601
+	 */
+	public function test_wp_new_comment_respects_author_ip_empty_string() {
+		$u = $this->factory->user->create();
+		$post_id = $this->factory->post->create( array( 'post_author' => $u ) );
+
+		$data = array(
+			'comment_post_ID'      => $post_id,
+			'comment_author'       => rand_str(),
+			'comment_author_IP'    => '',
+			'comment_author_url'   => '',
+			'comment_author_email' => '',
+			'comment_type'         => '',
+			'comment_content'      => rand_str(),
+		);
+
+		$id = wp_new_comment( $data );
+
+		$comment = get_comment( $id );
+
+		$this->assertEquals( $data['comment_author_IP'], $comment->comment_author_IP );
+	}
+
+	/**
+	 * @ticket 14601
+	 */
+	public function test_wp_new_comment_respects_comment_agent() {
+		$u = $this->factory->user->create();
+		$post_id = $this->factory->post->create( array( 'post_author' => $u ) );
+
+		$data = array(
+			'comment_post_ID'      => $post_id,
+			'comment_author'       => rand_str(),
+			'comment_author_IP'    => '',
+			'comment_author_url'   => '',
+			'comment_author_email' => '',
+			'comment_agent'        => 'Mozilla/5.0 (iPhone; CPU iPhone OS 7_0 like Mac OS X; en-us) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11A465 Safari/9537.53',
+			'comment_type'         => '',
+			'comment_content'      => rand_str(),
+		);
+
+		$id = wp_new_comment( $data );
+
+		$comment = get_comment( $id );
+
+		$this->assertEquals( $data['comment_agent'], $comment->comment_agent );
+	}
+
+	/**
+	 * @ticket 14601
+	 */
+	public function test_wp_new_comment_respects_comment_agent_length() {
+		$u = $this->factory->user->create();
+		$post_id = $this->factory->post->create( array( 'post_author' => $u ) );
+
+		$data = array(
+			'comment_post_ID'      => $post_id,
+			'comment_author'       => rand_str(),
+			'comment_author_IP'    => '',
+			'comment_author_url'   => '',
+			'comment_author_email' => '',
+			'comment_agent'        => 'Mozilla/5.0 (iPhone; CPU iPhone OS 7_0 like Mac OS X; en-us) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11A465 Safari/9537.53 Opera/9.80 (X11; Linux i686; Ubuntu/14.10) Presto/2.12.388 Version/12.16 Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en; rv:1.8.1.4pre) Gecko/20070511 Camino/1.6pre',
+			'comment_type'         => '',
+			'comment_content'      => rand_str(),
+		);
+
+		$id = wp_new_comment( $data );
+
+		$comment = get_comment( $id );
+
+		$this->assertEquals( 'Mozilla/5.0 (iPhone; CPU iPhone OS 7_0 like Mac OS X; en-us) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11A465 Safari/9537.53 Opera/9.80 (X11; Linux i686; Ubuntu/14.10) Presto/2.12.388 Version/12.16 Mozilla/5.0 (Macintosh; U; PPC Mac OS ', $comment->comment_agent );
+	}
+
+	/**
+	 * @ticket 14601
+	 */
+	public function test_wp_new_comment_respects_comment_agent_empty_string() {
+		$u = $this->factory->user->create();
+		$post_id = $this->factory->post->create( array( 'post_author' => $u ) );
+
+		$data = array(
+			'comment_post_ID'      => $post_id,
+			'comment_author'       => rand_str(),
+			'comment_author_IP'    => '',
+			'comment_author_url'   => '',
+			'comment_author_email' => '',
+			'comment_agent'        => '',
+			'comment_type'         => '',
+			'comment_content'      => rand_str(),
+		);
+
+		$id = wp_new_comment( $data );
+
+		$comment = get_comment( $id );
+
+		$this->assertEquals( $data['comment_agent'], $comment->comment_agent );
+	}
+
+
	public function test_comment_field_lengths() {
		// `wp_new_comment()` checks REMOTE_ADDR, so we fake it to avoid PHP notices.
		if ( isset( $_SERVER['REMOTE_ADDR'] ) ) {