I know I could use a software firewall on the guest to achieve a situation similar to this, but is there a way to emulate a firewall (protecting multiple Guests) between a host and guests on a host-only VM network?

I've googled around, but haven't learned much - perhaps I'm using the wrong phrasing/vocab? I know this can't be a novel question.

Ps: part of the intent is avoiding configuring a firewall individually on each guest with the same settings so the guests stay

  • A host only network will create a virtual device on the host, can't you just use iptables to filter traffic to/from that?
    – user260758
    Commented Nov 8, 2013 at 21:49

2 Answers 2


You can route the network through one guest which contains the firewall and then you just let all your other guests connect through the network of the firewall-VM.

  • 2
    This makes sense to me conceptually, thanks for the advice - I'll try to implement it tonight
    – gal
    Commented Feb 2, 2013 at 21:56
  • 1
    m0n0wall is great for this, tiny footprint, vmware/iso/USB download formats, and enough features for most purposes. Commented Feb 3, 2013 at 13:33

I'm only familiar with a single offering at this time, but I'm almost positive there are more. I believe the term most people are using is "Cloud firewall."

The virtual firewall that I'm familiar with is the 1000V ASA from Cisco. See links below.

http://www.cisco.com/en/US/docs/security/asa/quick_start/asa1000V/1000V_GSG.pdf http://www.cisco.com/en/US/prod/collateral/vpndevc/ps6032/ps6094/ps12233/data_sheet_c78-687960.pdf

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