<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt"><div>Jason,<br><br><span>For Vyatta questions, it's best directed to their forum at <a target="_blank" href="http://vyatta.org/forum">http://vyatta.org/forum</a>. Their site also has excellent documentation on basic set up, which is found at <a target="_blank" href="http://vyatta.org/documentation">http://vyatta.org/documentation</a>.</span><br><br>I have a very similar set up as yours, Comcast business and Vyatta Community Edition with three nics - WAN, LAN, and DMZ. To set up Vyatta so that you can access internal servers from external sources, you would need to set up destination NAT's. You would then create firewall rules to allow specific destination ports into your network. With Vyatta for incoming traffic, DNAT is first performed before going to the firewall, that's
why you see the internal IP address in the firewall rule and not external IP address.<br><br>Here is a sample DNAT rule for SMTP to my mail server:<br><br>rule 200 {<br> description "DNAT TCP connection from WAN to mail server"<br> destination {<br> address 123.123.123.100<br> port 25<br> }<br> inbound-interface eth0<br> inside-address {<br> address 10.10.10.10 <br> }<br> protocol tcp<br> type destination<br> }<br><br>Here is a sample firewall rule for SMTP to my mail server:<br><br>rule 500 {<br> action accept<br>
description "accept tcp port from WAN to alpha"<br> destination {<br> address 10.10.10.10<br> port 25<br> }<br> protocol tcp<br> source {<br> address 0.0.0.0/0<br> }<br> }<br><br>My cpu isn't all that powerful, but it serves my network well. If you have low traffic volume, your P3/P4's should be sufficient.<br><br>vyatta$ cat /proc/cpuinfo<br>processor : 0<br>vendor_id : CentaurHauls<br>cpu
family : 6<br>model : 9<br>model name : VIA Nehemiah<br>stepping : 8<br>cpu MHz : 998.714<br>cache size : 64 KB<br>fdiv_bug : no<br>hlt_bug : no<br>f00f_bug : no<br>coma_bug : no<br>fpu : yes<br>fpu_exception : yes<br>cpuid level : 1<br>wp : yes<br>flags : fpu vme de pse tsc msr cx8 sep mtrr pge cmov pat
mmx fxsr sse up rng rng_en ace ace_en<br>bogomips : 2000.40<br>clflush size : 32<br>power management:<br><br>Again, vyatta.org is the best place to get the information you need.<br><br></div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;">Best,<br>Wilson<br><br><br><div style="font-family: arial,helvetica,sans-serif; font-size: 10pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> ML <mailinglists@MailNewsRSS.com><br><b><span style="font-weight: bold;">To:</span></b> CentOS mailing list <centos@centos.org><br><b><span style="font-weight: bold;">Sent:</span></b> Monday, October 5, 2009 2:45:12 PM<br><b><span style="font-weight: bold;">Subject:</span></b> [CentOS] More about firewalling<br></font><br>
Hi All,<br><br>So before when I used PIX's for my employer, our traffic was <br>statically routed to one IP and then the firewall decided if allowed/ <br>denied and passed it on or dropped it.<br><br>I have a Comcast business circuit with 13 IP's. The gateway device <br>they provide is a 'pass through' device. They sent traffic for all 13 <br>IP's my way. It just allows traffic through. So if I put in a device <br>to firewall (like Ipcop or Vyatta or something) in front, say it has 3 <br>NICS, how do I do that?<br><br>If the Firewall has IP A and Traffic for IP B comes in how would IP A <br>answer and decide if the traffic to IP B belonged? Without statically <br>routing I am confused on how to accomplish this?<br><br>How fast does this device need to be?<br><br>Best,<br>-Jason<br>_______________________________________________<br>CentOS mailing list<br><a ymailto="mailto:CentOS@centos.org"
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