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Well, we have this gentoo guide for portsentry:[1] This seem a bit dated. |
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I'd be curious for any information folks use including config file snippets |
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or deployment strategies, particularly in a multi-layered scheme. There is |
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only basic configuration/deployment ideas in /usr/share/doc/portsentry/. |
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Something newer/better than portsentry to watch |
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the ports? |
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I'm building up a small soho with 5 static ips, including (2) dns servers, |
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mail and a small (less than 10 domains) webserver all in a "dmz' and the |
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then a few dozen systems behind a second firewall. Certainly the minimal |
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ports to leave open (via iptables on each of these servers systems) as |
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well as the specific list of which ports to set portsentry to monitor by |
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category (DNS(bind) :: Web(apache) :: mail(postfix)) would be keen. |
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Should I put the port scanning on the the systems behind the published |
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(routed) ip address too just to see what (if anythying) get thru? Nothing |
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but return traffic should get through to the lan (no ssh into lan systems |
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or such will be allowed). |
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Reference diagrams of typical soho (< 50 systems) are of keen interest |
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just to get some ideas. In fact suggestions on FOSS to use to draw up some |
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generic diagrams, a wee bit nicer than dia, would be keen suggestions too. |
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Tripwire vs AIDE? |
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Perhaps a iptables protecting the dmz systems and main gateway (single |
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homed) but a nftables [2] based firewall/gw/router to the internal lan? |
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Note: This is more of a project than a collection of simple (syntax) answers |
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to specific questions (although all information is appreciated just to |
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complete the discussion). Any sensitive information can be send to me |
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privately for assured confidence. |
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Your ideas are welcome, |
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James |
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[1] https://wiki.gentoo.org/wiki/PortSentry |
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[2] https://wiki.gentoo.org/wiki/Nftables |