A few weeks ago, while analyzing a customer’s network, I’ve discovered that their QNAP NAS was making a lot of outgoing connections on UDP port 6881.<\/p>\n

Knowing that this NAS is only used as an internal repository for Veeam backup, I knew that this traffic was not wanted.<\/p>\n

Here is an example of the traffic :<\/p>\n

<\/p>\n

After a quick search, it appears that this port is a BitTorrent port<\/a>. This search confirms that this is an unwanted network traffic.<\/p>\n

So, I’ve looked up on the QNAP documentation and forum, and I’ve discovered a post<\/a> that was speaking about this problem.<\/p>\n

This problem is linked to the package “Download Station<\/a>” that is installed on this QNAP.<\/p>\n

Here is the way to solve the problem :<\/p>\n

\n
• Open the Download Station<\/li>\n
• Go to the Settings and then “BT”<\/li>\n
• On the “BT” tabs, select the “Connection” and then uncheck the two boxes “Enable DHT network<\/strong>” and “Enable UPnP port mapping<\/strong>“<\/li>\n
• After a few seconds, all the connections will be terminated<\/li>\n<\/ul>\n

  <\/p>\n

   <\/p>\n

  <\/h3>\n","protected":false},"excerpt":{"rendered":"

  A few weeks ago, while analyzing a customer’s network, I’ve discovered that their QNAP NAS was making a lot of outgoing connections on UDP port 6881. Knowing that this NAS is only used as an internal repository for Veeam backup, Read More …<\/a><\/p>\n","protected":false},"author":1,"featured_media":66,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","footnotes":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[4,5],"tags":[7,8],"jetpack_publicize_connections":[],"yoast_head":"\n