Alcatel-Lucent 7450 System Management Manual page 212

TTL Security Commands
no ttl-security
Context config>system>login-control>ssh
config>system>login-control>telnet
Description This command configures TTL security parameters for incoming packets. When the feature is
enabled, SSH/Telnet will accept incoming IP packets from a peer only if the TTL value in the packet
is greater than or equal to the minimum TTL value configured for that peer. Per-peer-queueing must
be enabled in order for TTL protection to operate.
The no form of the command disables TTL security.
Parameters min-ttl-value — Specify the minimum TTL value for an incoming BGP packet.
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7450 ESS System Mangement Guide