Question about Cyberguard SG300 (00852503000366) Firewall

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Sg300 TST light blinking non stop

I reset the SG300 and still unable to get traffic through the unit and the TST light blinks nonstop. Did a reset from within the config table, no luck there either

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3 Suggested Answers

SOURCE: Cyberguard SG300

From the main configuration screen select Network Setup, and then click on the Connections Tab. In the tabline below that click on Aliases.

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.

Posted on Nov 15, 2007

  • 1 Answer

SOURCE: Need to network SG300 Firewall and Qwest (Motorola) 3347-02 Modem

The modem needed to be set to a 192.168.x.x network, and the SG300 Firewall WAN port needed to be set to a dummy IP on the same network for it's IP, and the specific 192.168.x.x address for the gateway and DNS.

Posted on Nov 11, 2008

tjt3
  • 44 Answers

SOURCE: locked out of HTTP inside port on SG300 - telnet works

I was unable to supply a link to the manual for this product so I downloaded it to one of my sites to make it available to you. Here is the link:

http://www.dscmain.com/snaplink/sg_314_ug_revA.pdf

Please let me know if this helps...
Tim

Posted on Mar 25, 2009

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Cyberguard SG300


From the main configuration screen select Network Setup, and then click on the Connections Tab. In the tabline below that click on Aliases.

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.

Oct 19, 2007 | Cyberguard SG300 (00852503000366) Firewall

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