Tunnel types

SIT (6in4) — Protocol 41 encapsulation. Simplest setup, works on most platforms .

GRE — Generic Routing Encapsulation. More flexible, supports additional use cases .

WireGuard — Modern encrypted VPN tunnel. Secure, high-performance IPv6 connectivity with minimal configuration .

Prefix assignment

Each account receives a dedicated ::/64 IPv6 subnet automatically assigned from our address space. Select your preferred UK or NL Point of Presence (POP)

The prefix is yours for the lifetime of the tunnel .

BGP peering

AS209552 offers BGP peering for users with their own ASN and IPv6 prefixes .

Contact us with your ASN and PeeringDB entry to get started .

rDNS / PTR records

Reverse DNS records for your ::/64 prefix can be managed directly from the dashboard .

Changes propagate within minutes .

Per-tunnel limits

50 Mbit/s up + down, kernel-shaped

3 tunnels per account

Blocked ports

SMTP · 25 · 465 · 587 · 2525

POP3/IMAP · 110 · 143 · 993 · 995


We don't run mail and we won't relay yours .

Abuse

Spam, scanning, illegal traffic, DDoS reflection — instant termination, no warning .

SYN-flood + ICMP rate limits applied per-tunnel automatically .

Limits exist so the service stays available for everyone .

No SLA , no uptime guarantee . We run this because it should exist . For questions contact support@cushell.com