ISP & Network Engineering • AS210940 • Verified 2026

Protect Your Devices on Lit Fibre Gigabit Altnet UK From ARP Spoofing, Sniffing & Unknown Intruders

Experiencing slowdowns or connection drops on Lit Fibre Gigabit Altnet UK (AS210940 • 10G XGS-PON / CGNAT (100.64.0.0/10)) during 18:30–23:00 UK? Shared or weakly secured Wi-Fi networks expose unencrypted DNS queries, mDNS device names, and session traffic to local packet capture and rogue access points. SWEEPR VPN combines a 30-second local ARP/mDNS device audit with instant 10Gbps WireGuard encryption and in-tunnel DNS (`10.66.0.1`) so local snoopers see zero plaintext metadata.

Run the Free 30-Second Home Wi-Fi & ISP Speed Diagnostic

Featherlight ~3.7 MB native Rust + Tauri v2 app • No credit card required for Wi-Fi device scanner • £1.99 1st-Month Pro Trial

Download Free Scanner View Plans (Save 50% Yearly)

Unprotected Lit Fibre Gigabit Altnet UK

Plaintext DNS & LAN Exposure

With SWEEPR 10Gbps WireGuard

ChaCha20-Poly1305 Encrypted

Recommended WireGuard MTU

1420 Bytes (Zero DNS / WebRTC Leaks)

Why Lit Fibre Gigabit Altnet UK (AS210940) Suffers From From ARP Spoofing, Sniffing & Unknown Intruders

On Lit Fibre Gigabit Altnet UK (10G XGS-PON / CGNAT (100.64.0.0/10)), residential and mobile gateways frequently encounter Carrier-Grade NAT port exhaustion and evening streaming bitrate drops between 18:30–23:00 UK. Standard unencrypted TCP/UDP flows expose plaintext Server Name Indication (SNI) headers, destination ASNs, and packet timing signatures that automated network queues classify and deprioritize.

Furthermore, using a default 1500-byte or uncalibrated VPN tunnel on Lit Fibre Gigabit Altnet UK triggers IP packet fragmentation unless your WireGuard interface is pinned to MTU = 1420.

How SWEEPR VPN Solves This on Lit Fibre Gigabit Altnet UK

Direct 10Gbps LINX & AMS-IX Peering: Instead of traversing congested retail transit links on AS210940, SWEEPR VPN routes your encrypted UDP stream directly to our 10Gbps RAM-only bare-metal nodes in UK-LON-01 (4ms), NL-AMS-01 (8ms), DE-FRA-01 (11ms), and SE-STO-01 (14ms).
Auto-Calibrated 1420 Byte MTU: SWEEPR VPN automatically detects 10G XGS-PON / CGNAT (100.64.0.0/10) path overhead and clamps your WireGuard tunnel to MTU = 1420 with PersistentKeepalive = 25.
In-Tunnel Zero-Log DNS (10.66.0.1): Bypasses Lit Fibre Gigabit Altnet UK transparent DNS proxies and NXDOMAIN interception completely.
Free 30-Second Home Wi-Fi Device Scanner: Instantly audits every phone, laptop, IoT plug, and Smart TV connected to your Lit Fibre Gigabit Altnet UK router subnet.

Recommended WireGuard Profile for Lit Fibre Gigabit Altnet UK (AS210940)

[Interface]
# SWEEPR VPN 10Gbps RAM-Only Profile optimized for Lit Fibre Gigabit Altnet UK (10G XGS-PON / CGNAT (100.64.0.0/10))
PrivateKey = <GENERATED_ON_DEVICE_NEVER_LEAVES_RAM>
Address = 10.66.18.42/32
DNS = 10.66.0.1
MTU = 1420

[Peer]
# UK-LON-01 (London Docklands 10Gbps • 4ms Direct Peering)
PublicKey = 9xK2vP8mQ4nL7wR1tY5uI8oP3aS6dF9gH2jK5lZ8xC0=
Endpoint = lon01.sweeprvpn.com:51820
AllowedIPs = 0.0.0.0/0, ::/0
PersistentKeepalive = 25

Transparent Anchor Pricing & 30-Day Money-Back Guarantee

Unlike legacy VPNs that trap you in 24-month renewals or 250 MB bloated installers, SWEEPR VPN offers straightforward pricing with an instant free 30-second Home Wi-Fi Device Scanner:

Plan Tier	Billing Cycle	Effective Monthly Cost	Included Features
Yearly Plan (Core Cash Cow — Save 50%)	£74.99 / year ($95.99 USD \| €89.99 EUR)	£6.25 / mo	10Gbps RAM-Only WireGuard (UK, NL, DE, SE, CH, US), 10 Devices, Kernel Kill-Switch, 30-Day Guarantee
6-Monthly Plan (Mid-Tier Anchor — Save 35%)	£48.99 / 6 months ($61.99 USD \| €58.99 EUR)	£8.17 / mo	All 10Gbps WireGuard Core Locations, In-Tunnel DNS, Port-Forwarding & Streaming Support
Monthly Plan (Flexible + £1.99 1st Month)	£1.99 1st Month, then £12.49 / mo	£12.49 / mo	Cancel anytime in 1 click, full 10Gbps WireGuard & Wi-Fi diagnostic access
SWEEPR Wi-Fi Radar & Smart-TV Shield Add-On	+£14.99/yr \| +£9.99/6mo \| +£1.99/mo	Optional Add-On	24/7 Unknown Wi-Fi Intruder Alerts + Samsung/LG/Sony/Roku/Fire TV ACR Spy Blocker

Frequently Asked Questions

What is the best WireGuard MTU setting for Lit Fibre Gigabit Altnet UK?

For Lit Fibre Gigabit Altnet UK (10G XGS-PON / CGNAT (100.64.0.0/10)), setting your WireGuard interface to MTU 1420 prevents IP packet fragmentation and PMTUD blackholes while maximizing 10Gbps throughput.

Does SWEEPR VPN work with Lit Fibre Gigabit Altnet UK routers and Wi-Fi mesh systems?

Yes. You can run the ~3.7 MB SWEEPR VPN native app on Windows 10/11, macOS, Linux, iOS, and Android, or export a standard WireGuard .conf file for OpenWrt, GL.iNet, Asuswrt-Merlin, MikroTik, and UniFi gateways connected to Lit Fibre Gigabit Altnet UK.

Is the 30-second Home Wi-Fi Scanner really free on Lit Fibre Gigabit Altnet UK?

Yes. Downloading SWEEPR VPN includes our instant 30-second LAN ARP/mDNS device scanner at zero cost (no credit card required), showing every device and Smart TV on your Lit Fibre Gigabit Altnet UK Wi-Fi.