Question about Juniper Networks SECURE SERVICES GATEWAY 320 SYS BASE 256MB 3 PIM AC SCREENOS 19IN (SSG-320M-SB) Firewall

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Cannot Access Internet from the DMZ

I have a SSG -320 firewall. I having problems connecting from the DMZ zone to the untrust zone. Also, from the untrust zone to the DMZ. If anyone has any suggestions I would appreciate it.

Thanks,

Cliff

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  • Gopi Venkatesan
    Gopi Venkatesan May 11, 2010

    Please post the issue in detail

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  • 73 Answers

If there is proper policy in place then there wont be any issue.

if at all you need to access your DMZ from internet you need to configure VIP or MIP on the firewall and also a policy needs to be written to permit the traffic.

If you need more help you shall contact me.

Posted on Mar 26, 2009

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I am assuming this is the NAT you are talking about.

The NAT problem is caused by the inability to send out information stopped by your firewall. I am not sure what internet router you have but look up your router type and you must pout the Xbox 360 into "DMZ" mode.

With your computer network, the router stops random people from connecting to your computer to give you viruses and things like that. The Xbox 360 cannot get viruses so you should be fine.

In DMZ, Demilitarized Zone, the router doesn;t protect that device and therefore the firewall is completely free for what is in it.

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Then, access the router's web-page that defines which of your computers/XBOX is to be placed into the 'DMZ' ("De-Militarized-Zone"). Put your XBOX, not your desktop, into the 'DMZ', to allow it "full" access to the Internet, i.e., bypassing the protection of the "firewall" that is inside your router.


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1 Answer

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What is their internet connection speed?

Your friend may not have port forwarding on their home network and the network router filters the Internet NAT redirection...

Setting up a DMZ (Demilitarized Zone) on the router for the Xbox gives it unrestricted access to the internet; also puts your Xbox outside you routers firewall.

DMZ ports have to be programmed manually and the IP address also must be manually entered; The DHCP Automatic IP address puts the Xbox back behind the firewall; just duplicate the automatic DNS Server settings and the Netmask. Then choose a IP address outside the Automatic IP range (e.g. 192.168.1.175)

If that does resolve the issue see if the other Xbox needs a Live Update.

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At this point you input the Alias IP address and the netmask and add it, selecting port 25. The firewall now knows that it is to forward all traffic on port 25 to the computer that has the IP address you put in.

You should be aware that doing the above opens a direct access point into your network! Port 25 is the port used for SMTP (Sendmail) and it is the most vulnerable and most hacked service on the Internet! You should seriously consider not doing this.

A better option would be to goto the DMZ tab and configure a DMZ net on your firewall - you will need to obtain a second routable IP address from your ISP to do this though. By creating the DMZ and then routing port 25 to a machine inside the DMZ you isolate the machine running SMTP from all of the other machines inside your protected network and so make a compromise much less likely.

All of the systems inside your protected network will still have demand access to the machine in our DMZ, but the machine in your DMZ would be unable to initialize access to the protected network, which is a much safer setup.

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If you're within a network and try connecting to computers on it with the WAN public IP, it simply won't work - you must use the network IP. On an external Internet connection, it should connect fine to the public IP. If you have access to an external machine (remote desktop), or if you know of an FTP proxy, you can try it that way. I also believe http://www.webftp.co.uk/ a web based FTP client would act as somewhat of a proxy, you could try that with the public IP and see how you go.

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1 Answer

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A router normally stops incoming Internet traffic from getting on your network, unless the traffic is in response to one of your computers or when using port forwarding. But instead of discarding the incoming traffic or using port forwarding, you can send incoming traffic to one computer on your network by establishing a "Default DMZ Server". (DMZ = humorous reference to "Demilitarized Zone".) This avoids you having to figure out what ports an Internet application wants ? by throwing all ports open for that computer. For regular network operation, NETGEAR recommends you do not use a DMZ. A computer with DMZ loses firewall protection, and is exposed to exploits from the Internet. If compromised, your own computer can attack the rest your network. Instead of DMZ, use port forwarding, as described in How is Port Forwarding Configured? However, the DMZ server feature is helpful: * When you have a problem connecting to an Internet service. Setting up a DMZ will determine whether a closed port is responsible for the problem. * With some online games and videoconferencing applications that are incompatible with NAT. Follow the procedure under your router model to create a DMZ To Create a DMZ for RP614, MR814, FVS318, FVM318, WGR614 1. Open a Web browser, and type the router's IP address (The router's default IP address is 192.168.0.1). Click Go. 2. Enter the username and password for the router (Default username is admin and password is password). 3. From the browser Main Menu select Advanced > Security. Some routers, such as the MR814, use the WAN Setup Options, page, instead. 4. Enter the server's IP address. 5. Click Apply. To Create a DMZ for FR114P, FR114W, FM114P, FR328S, FVL328 1. Open a Web browser, and type the router's IP address (The router's default IP address is 192.168.0.1). Click Go. 2. Enter the router's username and password (Default username is admin and password is password). 3. From the browser Main Menu select Advanced > Security. 4. Click Rules. 5. Check the box for Default DMZ Server, and enter the server's IP address the corresponding box for the IP Address. 6. Click Apply. To Create a DMZ for RH340, RH348, RT328, RT338, RT311, RT314, RP114, RO318, MR314, DG814 * Going through the GUI and going to Port Forward in the left menu bar. * For RM356: Going through telnet and from the main menu go to menu #15. 1. Open a Web browser, and type the router's IP address (The router's default IP address is 192.168.0.1). Click Go. 2. Enter the router's username and password (Default username admin, password 1234). 3. From the Main Menu of the browser interface, under Advanced, click Port Forwarding to view the port forwarding menu. 4. Enter the IP address of the DMZ server in the corresponding Server IP Address box. 5. Click Apply at the bottom of the menu.

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