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Because &quot;static NLB IP is private IP address and cannot be reached from the internet.
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Because "static NLB IP is private IP address and cannot be reached from the internet.

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I have configure STATIC NAT with public IP. so I should able reach the NLB IP with Public IP &nbsp;from Internet..
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I have configure STATIC NAT with public IP. so I should able reach the NLB IP with Public IP  from Internet..

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You need to complement static nat with port list that you let pass between zones.
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You need to complement static nat with port list that you let pass between zones.

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Hi.. I have setup a pair of Windows 2012 R2 NLB server for Exchange CAH/HUB Servers.<br />
the NLB IP was tested working in the LAN segment. I configure static ARP MAC onto my Juniper SRZ X firewall and from firewall console, i'm able reach the NLB IP via PING test. <br />
<br />
I have configured static NAT to the NLB IP, and when i'm try to access the NATed NLB IP from internet, it just failed. at first, i suspect if my NAT rules configured wrongly, and i configure another NAT rule pointed the NLB server real IP, and it just works when i browse the public IP from internet. <br />
<br />
My SRX is running in 12.1X46-D35.1, bios is 2.6. is there any other thing that i should look into it?
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Hi.. I have setup a pair of Windows 2012 R2 NLB server for Exchange CAH/HUB Servers.
the NLB IP was tested working in the LAN segment. I configure static ARP MAC onto my Juniper SRZ X firewall and from firewall console, i'm able reach the NLB IP via PING test. 

I have configured static NAT to the NLB IP, and when i'm try to access the NATed NLB IP from internet, it just failed. at first, i suspect if my NAT rules configured wrongly, and i configure another NAT rule pointed the NLB server real IP, and it just works when i browse the public IP from internet. 

My SRX is running in 12.1X46-D35.1, bios is 2.6. is there any other thing that i should look into it?

Juniper SRX NATting for Windows NLB IP

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.

Networking

Networking hardware includes the physical devices facilitating the use of a computer network. Typically, networking hardware includes gateways, routers, network bridges, modems, wireless access points, networking cables, line drivers, switches, hubs, and repeaters. But it also includes hybrid network devices such as multilayer switches, protocol converters, bridge routers, proxy servers, firewalls, network address translators, multiplexers, network interface controllers, wireless network interface controllers, ISDN terminal adapters and other related hardware.

Networking Hardware-Other

Networking software modules are interfaced with a framework implemented on the machine's operating system that implements the networking functionality of the operating system. The best known frameworks are the TCP/IP model and the OSI model. Systems typically do not use a single protocol to handle a transmission. Instead they use a set of cooperating protocols, sometimes called a protocol family or protocol suite.[9] Some of the best known protocol suites include: IPX/SPX, X.25, AX.25, AppleTalk and TCP/IP. Other protocols indirectly related to networking include the hypertext transfer protocol (HTTP) and its related technologies, Dynamic Host Configuration Protocol (DHCP), Domain Name Server (DNS) and other Internet protocols.

Networking Protocols

Network security consists of the policies adopted to prevent and monitor authorized access, misuse, modification, or denial of a computer network and network-accessible resources. Network security involves the authorization of access to data in a network, and covers a variety of computer networks; conducting transactions and communications among businesses, government agencies and individuals. Networks can be private, such as within a company, and others which might be open to public access.