Почему juniper vmx не поддерживает nat

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Почему juniper vmx не поддерживает nat

juniper не поддерживает подключения из локальной сети в локальную сеть.

А также прописываю политику, которая должна разрешать сессию из локальный сети в локальную сеть:

потом лезу по VNC из сети 192.168.10.0/24 в сеть 10.6.6.0/24 и все бы хорошо связь устанавливается и даже успеваю сделать паружестов мышью по удаленному рабочему столу, но потом связь обрывается.

если я прописываю статический маршрут на своём компе до 10.6.6.0/24 то связь не рвется.

вопрос: Что не так? Почему juniper е рержит подключения инициированые через него? что стоит в него прописать для счастья?

маршурты в обе стороны идут через джунипер?

такое бывает через 10 сек, если в одну сторону пакеты идут через джунипер а в другую как-то еще.

можно посмотреть — если счетчик пакетов в одну строну показывает 0

сравни «ip ro get 10.6.6.33» до установки статического маршрута и после.

IMHO проблема связана с обработкой icmp-redirect ( это можно посмотреть tcpdump-ом) или асимметрией маршутов

похоже на правду:

как решать проблему? что написать на juniper чтобы обратно пакеты ходили тоже через него?

Что мне написать на моём роутере, чтобы твои пакеты ходили через него?

На сервере к которому идет подключение или на гейте его добавить машрут между 10.6.6.0/24 в 192.168.10.0/24, не?

ну так есть маршруты то )))

это маршруты на гейте между клиентами в 10.6.6.0/24 и 192.168.10.0/24:

ну и, соответственно, openvpn выдает клиентам подсети 10.6.6.0/24 маршрут: 192.168.10.0/24 via 10.6.6.1

кароче, все гениальное — просто. добавил snat на juniper и все заработало:

Juniper SRX Series by Rob Cameron, Brad Woodberg

Get full access to Juniper SRX Series and 60K+ other titles, with free 10-day trial of O’Reilly.

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Chapter 9. Network Address Translation

Network Address Translation (NAT) is a fascinating and storied technology in computer networks. Perhaps more than any other network technology, NAT has found itself in the corner of many different use cases. Originally developed to extend the life of the IPv4 protocol after the exhaustion of the 4 billion public IP addresses (because an IPv4 address has 32 bits, and thus there are 2 32 available addresses). From its original purpose it gained wide popularity as a security technology to hide IP addresses and prevent inbound network connections, and now has seen many other uses. Today, it is being used extensively by service providers for carrier-grade NAT, by network administrators worldwide for IPv4 to IPv6 translation, and even on virtual machine hosts. Who would have seen a single physical computer needing to leverage NAT 15 years ago? Although it certainly isn’t the sexiest technology discussed in this book, it is necessary in most contemporary networks and can provide other benefits to provide a transparent network experience to users on their networks.

In this chapter, we focus on the core NAT technologies offered by the SRX. We start with a discussion of how NAT is processed on the SRX, with a thorough look at how it is implemented and configured from an administrative perspective. We delve into each of the different core NAT technologies supported on the SRX, including source, static, and destination NAT. We also examine IPv6 with NAT, including IPv4 to IPv6 NAT translations so that you can adapt to the exhaustion of available IPv4 addresses and a smooth translation to IPv6.

The Need for NAT

For those of you who are not extensively familiar with NAT, it is primarily used for a few functions. First, it was originally developed to extend the life of IPv4 by creating private address ranges that could be hidden behind the public address ranges on the Internet. In that way, fewer public IP addresses are needed for each individual and organization connecting to the Internet. The private addresses are not unique, and are not valid on the Internet, so they must be translated to public IP addresses before they can be routed on the Internet. It’s similar to having a telephone private branch exchange (PBX) with internal extensions versus public phone numbers. Inside the network you can just dial the extensions and connect directly with other members of the internal network, but someone from the outside cannot dial those extensions directly without the PBX handling them based on a publically routable phone number. Likewise, you need to have the PBX handle the routing of your phone call to outbound destinations or else you won’t be able to communicate with entities outside of your network.

Besides using NAT for extending the IP address ranges of IPv4, some network engineers took it a step further and intentionally leveraged NAT to hide the true IP addresses of their internal infrastructure so that it was much more difficult for attackers to connect directly to the addresses.

NAT can also be used for other utility functions like redirecting traffic from one IP port to another (even if not using public–private address ranges), and with IPv6 you can use it to translate between IPv4 and IPv6.

Finally, NAT can be used in some large-carrier ISP environments to further extend customer access when IP addresses are in short supply or when they are migrating from one range to another.

NAT as a Security Component?

Some network security engineers feel that NAT is truly a security component. In our opinion, that is a bit of a fallacy. It is true that NAT provides another layer of configuration that an attacker would have to hop through, but it’s nothing that a properly configured security policy couldn’t also do. The problem with using NAT as a security vector is that attackers have largely shifted their tactics with contemporary attacks. For instance, NAT doesn’t help you with services that need to be available on the Internet; it merely translates the traffic from the public to the private addresses (both malicious attacks and legitimate traffic). Although it does hide the internal source address of the public host, if attackers can compromise that host, they will be able to glean information about the internal network architecture anyway. And, of course, NAT isn’t going to help much with data exfiltration attacks like SQL injection or other data leakage.

With regard to protecting internal clients with NAT, attackers have found an enormous attack surface on the client machines of the network. New applications that try to provide a better user experience along with common applications installed on most user machines (Flash, Adobe PDF, Java, ActiveX, MS Office, etc.) have become a very reliable exploitation base. The attackers use various mechanisms to lure clients to malicious sites where they can exploit them. These methods include phishing and spear fishing, hijacking legitimate sites, leveraging forums, and drive-by downloads. Thus the client comes to the server and NAT cannot offer protection.

So what’s the moral of this section? Use NAT as a networking tool for multiplexing IP addresses onto your network without requiring a public IP address per host, use it to translate between private–public ranges, and use it to translate between protocols (e.g., IPv4 to IPv6). Although it will give you some implicit security benefits, these are not anything that you’re not able to get with other mechanisms. Don’t cut yourself short thinking that NAT will solve your security challenges. You will need to go much deeper with other services like UTM and IPS (along with other network and host-based protections) to provide in-depth security.

Junos NAT Fundamentals

In the early design phase of developing the SRX platform, it was clear that although ScreenOS had been wildly successful as a platform, its NAT capabilities left something to be desired. There was very little that you couldn’t do with ScreenOS NAT, but that didn’t mean that you might not have to jump through some hoops. ScreenOS primarily relied on two forms of NAT: interface-based NAT (Mapped IP 1:1, Destination IP 1:Many, and Virtual IP Many:1) and NAT directly referenced in the security policy rule itself. There were plenty of differences between these two models, with overlaps in functionality, many caveats to each approach, and the loss of some flexibility because the NAT was either tied to an interface or to a specific security policy rule. Although this often worked fine for simple use cases, it became much more difficult when it came to advanced NAT, where you would need granular rules. Additionally, there were many scenarios that required you to configure NAT on loopback interfaces, create pseudo-routes, and group NAT objects together to achieve the desired functionality. In addition, it could be more difficult to troubleshoot due to the fact that NAT could be placed in so many locations (does the dreaded trust interface NAT come to mind?).

The good news is that with the shortcomings of ScreenOS in mind, we set out to design a far superior model in Junos that leverages the best of simplicity, granularity, and flexibility in a new policy-based NAT approach. The Junos model varies from ScreenOS (see Table 9-1) in that it takes a policy-like approach to NAT, where NAT has its own rulebases with match and action criteria similar to firewall policies. NAT itself is abstracted from the security policies and other components like interfaces, although it can take in the properties of these rulesets to function. In Junos 11.2r2 and newer releases, we can also leverage address objects themselves in the NAT policies for a simpler user experience.

Mapped IP (MIP) at interface level

Static NAT via NAT Policy

Source NAT (many to one)

Dynamic IP (DIP) at interface level

Interface NAT (NAT vs. route mode per interface)

Dynamic IP via Security Policy

Source NAT via NAT Policy

Destination NAT (many to one)

Virtual IP (VIP) at interface level

Virtual IP in the Security Policy

Destination NAT via NAT Policy

Implicitly enabled when using MIP/DIP/VIP

Configurable entries per interface/IP address

Configurable per interface/IP address

Throughout this chapter when describing the different forms of NAT with examples, we might refer to internal/external and private/public mapping. It’s important to understand that these are purely topical; you can use any of these technologies in different scenarios (e.g., translating one public IP address to another, or using source NAT to translate one private IP address to another). In the broader discussions (outside of the specific examples) we’re just referring to the most familiar uses of these technologies for the sake of discussion.

Junos NAT Types

Before we get too far into the discussion of how NAT works and how to configure and operate it, let’s talk about what the three different types of Junos NAT are, and when you would use them.

Static NAT is a 1:1 bidirectional NAT that maps one IP address to another. For instance, in the trust zone the IP address might be 1.1.1.1, but when it goes out the untrust zone, it will be mapped to 2.2.2.2. Because this NAT is bidirectional, if the traffic comes in the reverse direction, it will be mapped from 2.2.2.2 to 1.1.1.1, security policy permitting. This means that you don’t need to manually create a reverse NAT entry for this mapping (as you’ll see later). The main use case for this type of NAT is when you have a host on which you want to perform NAT and you want both inbound access to this host and outbound access to come from the same IP address. Often it is used in DMZ scenarios where you have enough IP addresses present that you don’t want to overload the public IP addresses, or if you want to simply hide the internal addressing scheme without overloading or multiplexing of the IP addresses for simplicity.

Source NAT is a many:1 NAT that can map many IP addresses to one or more addresses, but not in a 1:1 fashion like static NAT. This NAT is dynamically allocated in real time based on the available IP addresses and ports in the pool. Unlike static NAT, there is no reverse entry so to speak (well, there is one exception with full cone NAT, but that is outside the scope of this book). For instance, you might want to hide all hosts in the trust zone in the subnet 192.168.1.0/24 behind a public IP address 2.2.2.3 when they connect out to the Internet. Hosts on the Internet cannot make a new connection back to the hosts because it is not a bidirectional form of NAT like static NAT. The typical use case for source NAT is to hide clients within a network behind one or more IP addresses when they browse out to the Internet. Because public IP addresses (particularly with IPv4) are at a premium, especially these days now that all ranges have been allocated since 2012, source NAT is a technology used in almost all networks. Everything from home broadband routers to mobile ISPs leverage source NAT to multiplex multiple hosts behind shared IP addresses. Some administrators also feel that NAT is a security mechanism. Although there is some truth to this, it is more of a side effect than the true purpose of NAT, and attackers have found numerous ways around NAT as a security mechanism. Source NAT can also be used to connect to trading partners when you use internal IP addresses to hide overlap, or to simplify routing and security on both sides.

Destination NAT is a 1: many form of NAT that allows you to map a single IP address to multiple IP addresses. For instance, inbound connections to IP address 2.2.2.4 in the untrust zone could be mapped to internal machines at 1.1.1.2, 1.1.1.3, 1.1.1.4, and 1.1.1.5. The mechanism to determine which internal host to map them to would be based on the port number in the destination IP address of the connection. For instance, if a packet arrives on 2.2.2.4 with destination port 25 (2.2.2.4:25), it will go to 1.1.1.2, 2.2.2.4:80 to 1.1.1.3, 2.2.2.4:443 to 1.1.1.4, and 2.2.2.4:10000 to 1.1.1.5. The main use case for this is when you are limited in the public IP addresses that you have but you need to make multiple services available on the Internet. If you don’t have enough public IP addresses to map 1:1 using static NAT, then you would need to use destination NAT. Destination NAT maps a table based on the destination IP address and destination port. This will translate the IP address to the internal address, and optionally you can also translate the destination port as well. Occasionally it is also used when there is IP address overlap (e.g., with a trading partner over a private IP network) where you might need to translate both the source and the destination IP addresses but you do not have enough IP addresses for 1:1 NAT.

We’ll explore more examples throughout this chapter, so a basic understanding of what each of the three types does is a great place to be at this point.

IPv6 was introduced to the SRX starting in Junos 10.2. NAT first became available in the Junos 11.2 releases for NAT 66, and then in 12.1 for NAT translation between IPv4 and IPv6. We’ll assume you’re running Junos 12.1 or newer code in this chapter for maximum feature support.

NAT Precedence in the Junos Event Chain

As we have referenced many times before in this book, the Junos packet flow is critical to understand when it comes to NAT implementation in the SRX, particularly for the policy lookup when the first packet arrives. When the initial packet arrives, the SRX will actually perform static NAT and destination NAT before it does the routing lookup or policy lookup, as we can see in Figure 9-1. This is because we are a zone-based firewall and we need to determine the security zone context. We know what the from-zone is based on the fact that we know what interface (and thus zone) the traffic arrived on, but to determine the egress interface (and thus the to-zone), we need to do a route lookup. If NAT is performed on the destination address of the packet (e.g., from the Internet inbound to an internal machine with a private address), we will need to perform NAT on the destination first to get the internal address, so that we can perform the route lookup. Technically you can do destination-based NAT to translate the destination IP address for any location; it doesn’t have to be an internal resource, but that’s definitely the most common use case.

At this point, you might be wondering what the difference is between static and destination NAT. Hold on to that thought, but for now just mentally note that they occur before the route lookup and that static NAT has precedence over destination NAT.

So now we’ve performed a transform on the destination address of the packet if there is a static or destination NAT rule configured that says to do so. What next? As mentioned, we perform a route lookup to determine the egress interface, and thus the egress zone. Now we can actually look for the matching security policy to determine how to process this traffic further.

Looking at Figure 9-1, we see that after the policy lookup we then perform the reverse static NAT and then source NAT (more to come on what both of these mean shortly). Why don’t we put the reverse static NAT and source NAT before the security policy, you might ask? The answer is simple: performance. We need to do the destination NAT so we can determine the egress interface and thus the egress zone for the security policy, but we don’t need to determine the source NAT at that stage. Instead we can defer that decision until after the policy lookup so that we don’t waste cycles doing another lookup if we’re just going to drop the traffic anyway. We’ll see more about the interesting implications that this has on the traffic later in this chapter.

Now that the NAT transforms and policy lookups are complete, we perform any Layer 7 services and install the session into the firewall table. When the next packet arrives for this session, we match the session, so we don’t have to do all of these lookups again. Instead, we fast path the traffic. We see that screens (packet based) and TCP (sanity checks like sequence/state) are performed, followed by NAT, where NAT refers to the transforms, so we don’t need to do another policy lookup after the initial policy lookup.

Junos packet flow

At the time of writing this book, Junos NAT is only supported in Layer 3 mode, not in transparent mode.

Почему juniper vmx не поддерживает nat

Широкополосные маршрутизаторы есть почти в каждом доме или офисе, ресторане, магазине, чтобы мы могли подключиться к глобальной сети. А в некоторых местах будут беспроводные удлинители для доступа к дополнительным точкам или усиления сигнала. Вы хотите расширить свой широкополосный доступ? Два разных бренда маршрутизаторов, Cisco и Juniper, могут предоставить вам высококачественные маршрутизаторы. Но когда дело доходит до сравнения маршрутизаторов Cisco и Juniper, какой из них лучше подходит для ваших нужд? Следуйте этому руководству, какой маршрутизатор лучше всего подойдет для вашего дома или бизнеса.

Настроим juniper vpn на SRX210

Добрый день уважаемые читатели, в прошлый раз мы с вами настроили сетевые интерфейсы на Juniper SRX210, а вот сегодня с помощью него же поднимем на juniper vpn канал, между двумя офисами, чтобы объединить с помощью него две локальные сети, рассмотрим примеры соединения, точка-точка и сеть-сеть. На сегодняшний момент, когда у компании может быть огромное количество филиалов, сложно представить жизнь без впн, и любой системный администратор, просто обязан знать его принципы работы и настройки.

Как настроить сетевой интерфейс на маршрутизаторе juniper srx210

Добрый день уважаемые читатели блога, сегодня я хочу показать вам как настроить сетевой интерфейс на маршрутизаторе juniper srx210. В примере будут рассмотрены как графический метод, так и через командную строку, вы уже сами определите какой метод вам нравится больше. На выполнение данной задачи у вас уйдет буквально пара минут вашего драгоценного времени, которое системный администратор и без того, знает куда применить.

Download Juniper vMX Router 15.1F4 for VMWare ESXi 5.5

Download Juniper vMX Router 15.1F4

Hello everyone, today I want to share with you a way virtual machine for VMWare ESXi 5.5 with Juniper vMX Router 15.1F4 on 05 Jan 2016. This image has asked me to put one of the readers. All bathed in a cloud of Yandex on disk, so that the speed will be different. Any questions, please write in the comments.

Скачать vSRX VMware Appliance with SCSI virtual disk 15.1X49-D15

Всем привет сегодня хочу поделиться vSRX VMware Appliance with SCSI virtual disk 15.1X49-D15, ранее он назывался Firefly Perimeter. Версия триальная на 60 дней, залито на яндекс диск, так что скачать сможете на хорошей скорости, vSRX является виртуализированным брандмауэров и гораздо больше. Этот продукт доступен для версий 5.X VMware VSphere. Эта виртуальная машина VMware обеспечивает возможности брандмауэра для вашего трафика, а также функциональность NAT и VPN. Построенный на технологии наших высокопроизводительных межсетевых экраны, vSRX включает в себя IPS и UTM технологии. vSRX также возможности кластеризации, что позволяет запускать виртуальные машины в активном / активном режиме, обеспечивая возможности допуска в случае неисправностей. Используя эту возможность, позволяет inheritently защитить ваши виртуальные машины, виртуальные серверы, приложения, виртуальной инфраструктуры без дополнительных систем.

Скачать Junosphere Connector VM for VMware Player / Download Junosphere Connector VM for VMware Player

Скачать Junosphere Connector VM for VMware Player

Всем привет сегодня хочу поделиться с вами образов в виде виртуальной машины Junosphere Connector VM for VMware Player / Download Junosphere Connector VM for VMware Player. Junosphere предоставляет виртуальную сетевую среду, в которой вы можете настроить сетевые устройства таким же образом, как и на физической сети, и построить локальную сеть на juniper.

Новое в Junosphere

Этот релиз содержит следующие новые функции:

Новый более дружественный интерфейс.
Усовершенствованная архитектура является более надежной, гибкой и автоматизированной, что обеспечивает повышенную производительность.
Поддержка новых образов: VJX1000 11.4, 12.3 VJX1000, VSRX 12.1X47-D20, Junos Space 14.1R3.4, Junos Space 14.1R3 (с приложениями), VRR 14.2.
Расширенный набор каких топологий, охватывающих базовые и расширенные маршрутизации.

Помогу скачать прошивку Juniper с официального сайта пишите помогу

Juniper

Добрый день! Уважаемые читатели и гости одного из крупнейших IT блогов России Pyatilistnik.org. Если у вас есть желание держать ваше сетевое оборудование в актуальном состоянии, то я слегка могу вам в этом помочь. Сразу оговорюсь, что лучше если вы купите сервисный контракт или же пройдете самостоятельную регистрацию вашего оборудования Juniper на официальном сайте, да этот процесс не быстрый, но за то, вы потом сможете все скачивать сами и при желании кому-то помочь. Если кому то нужно скачать прошивку Juniper с официального сайта пишите помогу и залью куда вам нужно. Ниже приведены ссылки на методы установки прошивки.

Juniper SRX: Configure Time and NTP Client

Juniper

Let’s see how to set the system time of an SRX Series device manually and configure NTP on the device.

Setting the Time Zone
The time zone is set to the time zone for Rome, Italy:

Почему juniper vmx не поддерживает nat

В комментариях к одной из статей у читателя возникла просьба рассказать о настрой ке Source NAT на Juniper SRX. Постараюсь здесь рассказать по подробней об этом, как всегда на примере.

У нас есть доверенная зона (trust zone) допустим это наша пользовательская подсеть, которую нужно выпустить в интернет. Так же у нас есть не доверенная зона (untrust zone) это собственно сеть оператора — выход в интернет.

Для того что бы выпустить в интернет пользователей потребуется настроить source NAT.

В каждой из зон у нас есть предварительно настроенные интерфейсы, если кратко процесс примерно вот такой:

Настраиваем на интерфейсе подключенном в сеть оператора связи адрес:
Настраиваем на интерфейсе в пользовательской сети адрес:
Добавляем интерфейсы в соответствующие зоны:
Не забываем настроить правила доступа между зоной trust и untrust а так же маршрутизацию.

Теперь можно перейти непосредственно к настройке source NAT:

Первым делом создаем rule-set и даем ему произвольное имя, в нашем случае trust-to-untrust:
Указываем из какой зоны будем NATить:
Указываем в какую зону будем NATить:
Теперь создаем непосредственно само правило, даем ему имя src-nat-rule:
Указываем с каких адресов будет происходить трансляция, т.к. в нашем случае она происходит из всей зоны указываем 0.0.0.0/0 в этом случае трансляция будет проходить с любого адреса.

Так же здесь могут указываться другие условия, такие как destination-address или destination-port, естественно их может быть несколько, они перечисляются в квадратных скобках, например:

при таком раскладе происходит трансляция просто в адрес интерфейса из зоны untrust.
Второй — трансляция в адрес или пул, может использоваться если нам требуется часть пользователей транслировать в адрес, например, другого оператора. В этом случае даем команду транслировать в определенный пул, с указанием имени этого пула:

После чего, нужно этот пул описать, делается это в ветке source nat:

Не забываем проверить настройки (show | compare, commit check) и сделать commit (если не уверены commit confirmed) для применения конфигурации.

Configure Source NAT in Juniper SRX via Command Line

Hi! This is the first part of the NAT configuration lab at Juniper SRX Devices. The plan is we will demonstrate how to configure source NAT, destination NAT, static NAT on Juniper SRX. Therefore, in this first article, I will demonstrate how to configure source nat in Juniper vSRX using the command line interface or CLI.

Our objectif according to the image above. We assume, the vSRX, router, and public-server are on the public network (internet). And Host-1, Host-2, and Host-3 are on the local network. By default, the public network cannot communicate with the local network, because the local network does not have a public IP.

192.168.1.0/24 translated to 11.11.11.0/26 (11.11.11.1 — 11.11.11.63).
192.168.2.0/24 traslated to IP of egress interface (5.5.5.2).

Initial Configuration (Hostname, Management, Users, etc)
Interface Addressing.
Security Zone
Routing

For the security we use the default security zone and the default security policies of Juniper vSRX 20.1R1. All local interfaces (ge-0/0/1, ge-0/0/2, and ge-0/0/3) are assigned to the trust zone. Meanwhile, the public interface (ge-0/0/0) is belong to the untrust zone. Traffic from the trust zone to the trust zone is permitted. And traffic from the untrust zone to the trust zone also permitted.

Here are the configuration details for the vSRX node. Yellow color indicate the configuration is set by me (not SRX default).

And these are the configuration in Router (we use Junos Olive 12.1R1 for router). And on this Router, we don’t configure routing to the local networks (private IPv4). We only route to the public network (public IPv4) if needed.

In Host-1, Host-2, Host-3, and Public-server, we configure addressing as usual, include default-gateway. Also, there are active SSH service for later testing. Apart from SSH, you can use any application that uses the TCP/UDP protocol. Let’s begin to configure!

Pool-based Source-NAT with or without PAT

Create a NAT pool for IP 11.11.11.1 to 11.11.11.62 which we will use for source nat with PAT (first task). I named it «Public-ipv4».

Then, add a set of rule (I named it «Ge1-NAT») and define the traffic direction by interface (from inteface ge-0/0/1 to ge-0/0/0). BUt, description is optional.

Then, create a Source NAT rule (I named it «Network-1-SrcNAT») and defaine the packet information match criteria. We use source-address 192.168.1.0/24 for match criteria. Description is optional but recomended.

Define the action for source NAT, we use pool «Public-ipv4» that we have made before.

Don’t forget to configure the Proxy ARP to make Juniper SRX reply ARP requests looking for IP 11.11.11.1 — 11.11.11.62 on the ge-0/0/0 interface.
And commit!

For your information, on the action source NAT. There is option called persistent-nat.

The persistent-nat feature to ensure that all requests from the same internal transport address are mapped to the same reflexive transport address (the public IP address and port created by the NAT device closest to the STUN server). Check details on persistent-nat | TechLibrary Juniper.

Okay, let’s continue our configuration. Now, we move move to the Router. Because 11.11.11.0 — 11.11.11.62 is not available on Router’s routing table. So, we must configure a route to the 11.11.11.0/26.

Now, we check whether Host-1 can communicate with the Public-server.

As you see, Host-1 can connect to Public-server (8.8.8.8). And a security flow session is created on vSRX. But the port is translated.

To disable Port Address Translation in Source-NAT using Pool-based. We can configure our Source NAT Pool: Public-ipv4.

Check again, try to connect to Public-server from Host-1. And the session will be like this:

On a pool based, there is an overflow option. This will be used when all the addresses in the pool are used up. SRX will map to an address on the interface or an address in another pool.

Interface-based Source-NAT with PAT

Now we move to the second task, we will configure a Source-NAT for 192.168.2.0/24 using egress interface. PAT is required and active by default.

Let’s create a new rule-set (i.e Ge2-NAT) and specify the entry and exit interfaces.

Then, create a new Source NAT rule in Ge2-NAT rule-set. I named it Network-2-SrcNAT. Description is optional but recomended to use it. Also, create a packet information match criteria. I.e. we will use source-address.

Then, defaine the action.

Now, commit. And see the Host-2 can reach Public-server.

And PAT is also running.

Soure-NAT only translate the source-address. Thus, the the local networks can access the public networks, but not vice versa.

That is all Source-NAT configuration. We will continue to configure the Destination-NAT and Static-NAT on another posts.

Penjelasan menggunakan bahasa Indonesia tentang cara konfigurasi source NAT di Juniper SRX dalam video berikut:

Tags: Source NAT Juniper SRX, Source NAT Junos SRX, Source NAT Juniper vSRX, Configure Source NAT on Juniper SRX, Configure Pool-based Source NAT in Juniper SRX, Configure Interface-based Source-NAT in Juniper SRX, Configure Pool-based Source NAT without PAT, Configure Pool-based Source NAT with PAT, cara konfigurasi source NAT Juniper SRX, cara konfigurasi source nat vSRX.

[Tutorial] Destination NAT (проброс порта)

Для диагностики будут полезны следующие команды:
> show security nat destination summary
> show security nat destination rule all
статистика по пулам и правилам: количество трансляций (hits), количество успешных и неправильных сессий
Если количество трансляций (Translation hits в > show security nat destination pool all) увеличивается, а сессий 0 — ошибка в security policies, возможно неверный порядок правил, если их несколько. Это объясняется тем, что NAT-трансляция происходит до обработки политик безопасности.
> show security flow session destination-prefix 1.2.3.4/32

Отличия для проброса порта (Destination NAT for IP Address and Port Translation):
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