# [ASP_NAT_PORT_BLOCK_ALLOC](https://apps.juniper.net/syslog-explorer/?msg=ASP_NAT_PORT_BLOCK_ALLOC)

## SYSLOG Details
- **Message**: <variable>source-address</variable> -> <variable>nat-source-address</variable>:<variable>nat-source-port-range-start</variable>-<variable>nat-source-port-range-end</variable>
- **Help**: NAT Port block allocation
- **Description**: When Port block allocation is configured, a port block will be allocated and assigned to a private IP if it is a first connection from that private IP or if there are no ports available in previously allocated port block for that private IP. This has the range of NAT ports and NAT IP allocated for that private IP.
- **Type**: Event: This message reports an event, not an error
- **Severity**: info
- **Cause**: -
- **Action**: -
- **Attributes**: source-address
nat-source-address
nat-source-port-range-start
nat-source-port-range-end
- **Facility**: LOG_PFE

## Found this message in the following releases:
- [Junos OS 26.2R1](https://apps.juniper.net/syslog-explorer/?msg=ASP_NAT_PORT_BLOCK_ALLOC&sw=Junos%20OS&rel=26.2R1)
- [Junos OS 25.4R1](https://apps.juniper.net/syslog-explorer/?msg=ASP_NAT_PORT_BLOCK_ALLOC&sw=Junos%20OS&rel=25.4R1)
- [Junos OS 25.2R2](https://apps.juniper.net/syslog-explorer/?msg=ASP_NAT_PORT_BLOCK_ALLOC&sw=Junos%20OS&rel=25.2R2)
- [Junos OS 25.2R1](https://apps.juniper.net/syslog-explorer/?msg=ASP_NAT_PORT_BLOCK_ALLOC&sw=Junos%20OS&rel=25.2R1)
- [Junos OS 24.4R2](https://apps.juniper.net/syslog-explorer/?msg=ASP_NAT_PORT_BLOCK_ALLOC&sw=Junos%20OS&rel=24.4R2)
- [Junos OS 24.4R1](https://apps.juniper.net/syslog-explorer/?msg=ASP_NAT_PORT_BLOCK_ALLOC&sw=Junos%20OS&rel=24.4R1)
- [Junos OS 24.2R2](https://apps.juniper.net/syslog-explorer/?msg=ASP_NAT_PORT_BLOCK_ALLOC&sw=Junos%20OS&rel=24.2R2)
- [Junos OS 24.2R1](https://apps.juniper.net/syslog-explorer/?msg=ASP_NAT_PORT_BLOCK_ALLOC&sw=Junos%20OS&rel=24.2R1)
- [Junos OS 23.4R2](https://apps.juniper.net/syslog-explorer/?msg=ASP_NAT_PORT_BLOCK_ALLOC&sw=Junos%20OS&rel=23.4R2)
- [Junos OS 23.4R1](https://apps.juniper.net/syslog-explorer/?msg=ASP_NAT_PORT_BLOCK_ALLOC&sw=Junos%20OS&rel=23.4R1)
- [Junos OS 23.2R2](https://apps.juniper.net/syslog-explorer/?msg=ASP_NAT_PORT_BLOCK_ALLOC&sw=Junos%20OS&rel=23.2R2)
- [Junos OS 23.2R1](https://apps.juniper.net/syslog-explorer/?msg=ASP_NAT_PORT_BLOCK_ALLOC&sw=Junos%20OS&rel=23.2R1)
- [Junos OS 22.4R3](https://apps.juniper.net/syslog-explorer/?msg=ASP_NAT_PORT_BLOCK_ALLOC&sw=Junos%20OS&rel=22.4R3)
- [Junos OS 22.4R2](https://apps.juniper.net/syslog-explorer/?msg=ASP_NAT_PORT_BLOCK_ALLOC&sw=Junos%20OS&rel=22.4R2)
- [Junos OS 22.4R1](https://apps.juniper.net/syslog-explorer/?msg=ASP_NAT_PORT_BLOCK_ALLOC&sw=Junos%20OS&rel=22.4R1)
- [Junos OS 22.2R3](https://apps.juniper.net/syslog-explorer/?msg=ASP_NAT_PORT_BLOCK_ALLOC&sw=Junos%20OS&rel=22.2R3)
- [Junos OS 22.2R2](https://apps.juniper.net/syslog-explorer/?msg=ASP_NAT_PORT_BLOCK_ALLOC&sw=Junos%20OS&rel=22.2R2)
- [Junos OS 22.2R1](https://apps.juniper.net/syslog-explorer/?msg=ASP_NAT_PORT_BLOCK_ALLOC&sw=Junos%20OS&rel=22.2R1)