AS7578 GSL Global Secure Layer

Global Secure Layer (GSL), an Australian-owned network operator that sells IP

transit and inline, anycast DDoS mitigation, with points of presence across

Australia, Asia, Europe and North America.

What it's used for

• Carrier IP transit and DDoS-scrubbing for customers whose traffic is routed through GSL's network, plus protected hosting on GSL-assigned addresses.
• The reverse DNS on its space is almost entirely router and backbone infrastructure under globalsecurelayer.com and gslnetworks.com, with names encoding the site and device role at Equinix and other facilities in Sydney, Melbourne, Adelaide, Brisbane, Singapore, Tokyo, Guam, Frankfurt, Amsterdam, Dallas, Los Angeles and New York.

Notable

• An IP here is network or protected-service infrastructure, not a consumer broadband subscriber. Addresses without a router name resolve to a generic unknown.globalsecurelayer.com, which is typical of scrubbed or customer-facing space rather than an eyeball pool.
• The announced inventory is small (a few thousand IPv4) but is drawn from several registries, which is normal for an operator that runs a global anycast edge rather than a broker signal.

Interesting

• GSL markets specifically to Australian government and public-sector customers on data-sovereignty grounds, so some of the traffic behind this AS is scrubbed government service traffic rather than the operator's own.