Running a self-hosted Path of Titans dedicated server is a labor of love. You set everything up, your community is growing, and then out of nowhere \u2014 lag spikes, disconnects, and your server is completely unreachable. Sound familiar? There’s a good chance you’re dealing with a Lantronix Device Server amplification attack hitting UDP port 30718, and it’s more common than most server admins realize.<\/p>\n
Lantronix Device Servers are network-attached serial device adapters used in industrial and enterprise environments. The problem? Many of these devices expose a discovery service on UDP port 30718 that responds to small requests with significantly larger replies.<\/p>\n
Attackers exploit this by spoofing your server’s IP as the source address and blasting Lantronix devices with tiny requests. Those devices respond \u2014 to YOU \u2014 flooding your connection with unsolicited UDP traffic. That’s amplification in a nutshell.<\/p>\n
Your first line of defense is ingress filtering at the host level. If your server isn’t expecting UDP traffic on port 30718, block it entirely. Here’s a quick iptables rule to drop that traffic before it ever touches your game server process:<\/p>\n
This won’t stop the bandwidth from hitting your NIC, but it prevents the packets from consuming CPU and application resources. Pair it with rate limiting on other suspicious UDP ranges to reduce the attack surface further.<\/p>\n Use If you actually run Lantronix devices on your network, lock them down. Disable the UDP discovery service if it isn’t needed, restrict access using firewall ACLs, and ensure they’re not reachable from the public internet. There’s zero reason for a device server to respond to strangers on the open web.<\/p>\n Regularly audit your network perimeter. Shodan and similar tools are not just for attackers \u2014 use them yourself to find what you’re accidentally exposing.<\/p>\n Host-level filtering only goes so far. If volumetric attack traffic is saturating your upstream pipe, packets arrive before iptables even sees them. This is where Lumen Technologies DDoS Hyper earns its place.<\/p>\n Lumen’s solution uses BGP route announcement to redirect your traffic through their scrubbing centers during an attack. Clean traffic gets forwarded to your server while the junk gets dropped upstream. It’s a transparent process for your legitimate players and brutally effective against amplification floods.<\/p>\n This kind of upstream protection is especially valuable for smaller hosting setups that don’t have dedicated network hardware to absorb volumetric attacks on their own.<\/p>\n If you’re unsure how to implement any of this \u2014 or you’re already under attack right now \u2014 professional DDoS protection consulting is available to help you architect the right solution for your specific setup.<\/p>\n Don’t wait until your community rage-quits because of downtime. Open a support ticket today and let’s get your Path of Titans server protected properly.<\/p>\n","protected":false},"excerpt":{"rendered":" Lantronix Device Server amplification attacks can devastate self-hosted Path of Titans servers by flooding them with unwanted UDP traffic on port 30718. This guide covers iptables filtering, Lantronix hardening, and Lumen DDoS Hyper upstream scrubbing to keep your game server online.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[87],"tags":[4,339,511,509],"class_list":["post-153","post","type-post","status-publish","format-standard","hentry","category-game-servers","tag-ddos-protection","tag-iptables-udp-filtering","tag-lantronix-amplification","tag-path-of-titans"],"views":2,"_links":{"self":[{"href":"https:\/\/miraiguard.com\/learn\/wp-json\/wp\/v2\/posts\/153","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/miraiguard.com\/learn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/miraiguard.com\/learn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/miraiguard.com\/learn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/miraiguard.com\/learn\/wp-json\/wp\/v2\/comments?post=153"}],"version-history":[{"count":0,"href":"https:\/\/miraiguard.com\/learn\/wp-json\/wp\/v2\/posts\/153\/revisions"}],"wp:attachment":[{"href":"https:\/\/miraiguard.com\/learn\/wp-json\/wp\/v2\/media?parent=153"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/miraiguard.com\/learn\/wp-json\/wp\/v2\/categories?post=153"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/miraiguard.com\/learn\/wp-json\/wp\/v2\/tags?post=153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}iptables -I INPUT -p udp --dport 30718 -j DROP<\/code><\/p>\nDon’t Forget to Save Your Rules<\/h3>\n
iptables-save<\/code> and restore them on reboot via your init system or a tool like iptables-persistent<\/code>. A rule that disappears after a restart gives you a false sense of security.<\/p>\nHardening Lantronix Service Exposure<\/h2>\n
Upstream Scrubbing with Lumen Technologies DDoS Hyper<\/h2>\n
Get Help Before the Next Attack Hits<\/h2>\n