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SSG 520 as L2 &quot;Router&quot;? What a waste of resources ...<br />
SYN Protection is part of the Screening options, and those are appliable only to zones, not IP addresses. And since an Interface can only belong to a single zone, you need to use different interfaces then. You do not need physical interfaces, subinterfaces (loopback) work fine with it.
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SSG 520 as L2 "Router"? What a waste of resources ...
SYN Protection is part of the Screening options, and those are appliable only to zones, not IP addresses. And since an Interface can only belong to a single zone, you need to use different interfaces then. You do not need physical interfaces, subinterfaces (loopback) work fine with it.

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What do you mean with zones ;<br />
I am sorry i am newbee on juniper. so should i create zone with creating a vlan on cisco or juniper ? <br />
<br />
or what should i do more &nbsp;? i do not want to make the device busy for unnecessary ip addresses that does not get any attack ?
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What do you mean with zones ;
I am sorry i am newbee on juniper. so should i create zone with creating a vlan on cisco or juniper ?

or what should i do more  ? i do not want to make the device busy for unnecessary ip addresses that does not get any attack ?

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Thank you please check oiut my other juniper questions also
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Thank you please check oiut my other juniper questions also

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I have a new juniper ssg520 and my network topology as given below.<br />
<br />
Is it possible to program juniper as transparent mode and watch / keep just the selected ip addresses not all of them ?<br />
<br />
for ex. i have 10 c class ip address and i just want to activate syn protection for 5 - 10 single ip address<br />
<a href="https://filedb.experts-exchange.com/incoming/2011/10_w43/515789/juniper.png" target="_blank" class="file-inline" title="jun (4 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>juniper.png</a>
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juniper.png

I have a new juniper ssg520 and my network topology as given below.

Is it possible to program juniper as transparent mode and watch / keep just the selected ip addresses not all of them ?

for ex. i have 10 c class ip address and i just want to activate syn protection for 5 - 10 single ip address

Juniper SSG520 network

Hardware-based firewalls provide more sophisticated protection for inbound and outbound traffic than the simple Windows software firewall or the basic NAT firewalls found in routers. These devices implement techniques such as stateful packet inspection, deep packet inspection, and content filtering; and may include built-in antivirus and anti-malware protection.

Hardware Firewalls

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.

Routers

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.