Member Avatar for gunso4050

Hi All,

I have a problem with Limewire using a considerable amount of bandwidth on the network at work (100 computers). I have tried asking the users not to use Limewire. I would like to block a port or ports. As the company does have laptops that are not protected by group policies but have lime.exe on them.

Cheers,

Matt

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  • Latest Post Latest Post by jbennet

Dani AI

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Context and quick guidance tied to the replies by , and .

Per-port blocking is fragile. LimeWire is a Gnutella client that can use arbitrary high ports, NAT traversal and peer-to-peer connections, so a handful of blocked ports will be workarounds rather than a reliable cure LimeWire .

Practical, layered actions that work in real networks:

  1. Egress policy: implement default-deny for outbound connections and explicitly allow only required services (web, mail, DNS). Force HTTP/HTTPS through an authenticated proxy and block direct outbound IPs.
  2. Disable UPnP/NAT-PMP on edge devices so clients cannot auto-open ports. See UPnP behavior for why this matters Universal Plug and Play.
  3. Use network application control / IDS-IPS signatures (Suricata/Snort) or firewall app-layer rules to detect and drop Gnutella/LimeWire flows where available.
  4. Endpoint control: identify and remove installed clients via inventory (SCCM/Intune) and block execution with AppLocker or Software Restriction Policies. Microsoft guidance: and .
  5. If devices cannot be remediated immediately, place them on a restricted guest VLAN and require remediation before full access.

Summary: prioritize endpoint blocking and egress whitelisting over single-port blocks. Combine removal, execution controls and network-level detection for an effective, maintainable result.

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Member Avatar for jbennet

no as some ISPs try and block the limewire ports / traffic so it has an option to enctrypt it, and use random ports

Member Avatar for bobbyraw

as the admin you should block the program it self, blocking port will not fix the issue you might end up blocking ports that are to be used by other application you can also set up a proxy server that blocks access for limewire.

PS how do you allow employees to run such a program in the first place on a work network you are setting up yourself for hacking, virus, spyware and adware on your network. you need to implement tighter security. IS THIS PROGRAM REQUIRED FOR WORK?

Member Avatar for jbennet

he cant block it as no local security policy

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