Cisco ASA SSL VPN AnyСonnect — host or network is 0

Столкнулся с такой ошибкой при настройки SSL VPN на Cisco ASA через AnyСonnect. Ошибка — host or network is 0.

Причина: не может выделится IP адрес из пула.

Решение: Добавить pool  в правило профиля по умолчанию. Не только в свой профиль но и в профиль по умолчанию.

Error: «An error was received from the secure gateway in response to the VPN negotiation request. Please contact your network administrator»
When clients try to connect to the VPN using the Cisco AnyConnect VPN Client, this error is received:

This message was received from the secure gateway:

«Illegal address class» or «Host or network is 0» or «Other error«


The issue occurs because of the ASA local IP pool depletion. As the VPN pool resource is exhausted, the IP pool range needs to be enlarged.

A bug is filed for this issue. The Cisco bug ID is CSCsl82188 (registered customers only) . This error usually occurs when the local pool for address assignment is exhausted, or if 32 bit subnet mask is used for the address pool. The workaround is to expand the address pool and use 24 bit subnet mask for the pool.

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