Help me rationalise my network please

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crembz

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May 21, 2023
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Yes it would be under both scenarios, my hosts are mainly a bunch of mini PC's with 1g NICs. But the Nas will be able to handle more multiple 1g connection from the hosts.

What would be the minimum CPU required for pfsense to handle 10g intervlan routing? I can't seem to find a definitive answer.
 

Rand__

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Mar 6, 2014
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That probably depends on the complexity ot your rules and services u run (ips/ids comes to mind)...
 

LodeRunner

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Apr 27, 2019
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That probably depends on the complexity ot your rules and services u run (ips/ids comes to mind)...
No probably about it. Once you're doing any inspection, or rules beyond very simple port and address based allow/deny, you hit the CPU quite hard. Plain routing is not CPU intensive by comparison.
 
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crembz

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May 21, 2023
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No probably about it. Once you're doing any inspection, or rules beyond very simple port and address based allow/deny, you hit the CPU quite hard. Plain routing is not CPU intensive by comparison.
Yeah I understand that. I'm still trying to find a baseline to decide if I'd be better served with a used mini pc or building a new Alder lake system.

E.g. would a i5 9500 be sufficient for inter vlan routing at 10g or should I build an itx alderlake w/16gb?
 

Rand__

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Just look at rhe ready made offerings of your preferred fw vendor, ie pfsense/opnsense. I think they have premade boxes that should give u an idea what hardware they recommend/use for a 10g capable box
 

LodeRunner

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Apr 27, 2019
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OPNSense’s most expensive unit can only manage 2 Gbps throughout with threat inspection, per its data sheet. It’s an embedded EPYC of some variety.

Here’s Netgate’s data sheet: https://info.netgate.com/hubfs/website-assets/netgate-hardware-comparison-doc.pdf
Looks like for mixed traffic at 10 Gb firewall throughout you’d need a 1537. It’s an embedded Xeon with QAT support (I think that only accelerates crypto functions though, not firewall inspection.) Netgate doesnt give numbers for inspection, just mixed traffic with 10k ACLs.
 

Sean Ho

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Nov 19, 2019
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Again, if you can reduce or eliminate the need for 10Gbps inter-VLAN routing, your hardware requirements for opensense simplify greatly. IDS/IPS is most useful at the border; if your ISP link is gigabit or less, normal hardware like say X10SL* is plenty. If you do find yourself needing 10Gbps inter-VLAN, consider routing those VLANs in hardware via L3 switch like something from the ICX megathread.
 
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crembz

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May 21, 2023
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Again, if you can reduce or eliminate the need for 10Gbps inter-VLAN routing, your hardware requirements for opensense simplify greatly. IDS/IPS is most useful at the border; if your ISP link is gigabit or less, normal hardware like say X10SL* is plenty. If you do find yourself needing 10Gbps inter-VLAN, consider routing those VLANs in hardware via L3 switch like something from the ICX megathread.
I'll probably only need one or two devices to route at 10g to be honest. The rest will all be on the same subnet. Debating between a used sff optiplex (i5 9500) or building a miniitx 13100. Just want this thing to be small and quite whilst still providing 10g.