Re: rc.firewall problem

[die tuere <reitenba () fh-brandenburg de>]

On Thursday 10 June 2004 07:05, jhon nash wrote:
> Hi All,
>
> Can any if u good souls help me with reverse firewall config? I have never
> configured a firewall before so plz excuse my knowledge:). I have 2
> honeypots on honeynet and I want it to use 192.168.2.2 and 192.168.2.3 for
> honeypots and I have two public IPs say for e.g 178.2.2.21 and 178.2.2.22.
> I have assigned IP address  192.168.2.1 on eth1 interface which is the
> LAN_IFACE and it goes to uplink port of a hub to which honeypots are
> connected. The honeypots are using this IP i.e 192.168.2.1 as default
> gateway is this right? also what should be default gateway for eth1?  Does
> the IP address assigned to eth0 i.e. the NIC which goes to the switch which
> connectes to external network matters or I can use any IP? Also what should
> be the default gateway for this IP? Finally if I want to use a DNS server
> from my network should I assign the IP of this DNS for e.g. 172.2.134.12 as
> DNS IP to all honeypots and firewall ? I will really really appreciate if
> you can help me with this.
hi john,

just some questions:
        do you use the firewall in bridge or nat mode?
        but i assume nat mode as if i get it out of your description, so the default 
                gate for the honeypots would be the internal ip address of the firewall
                so it should be right: 192.168.2.1
                the firewall itself has its default gateway as usual, eth1 there as your        
                internal interface doesnt need a default gw, i assume eth0 with its public
                ip's has a default gateway applied
        is one of your honeypots the dns/ntp server for both honeypots or are they 
                both clients to non-honeypot dns/ntp servers, there is a config section 
                where you can configure this?
        for management purposes, maybe you add a third nic, to a dedicated network,     
                especially secured, so you only have your two public honeypot ips on the        
                public network.

the rc.firewall script is a good starting point for a honeynet firewall. but 
out of my experiences i rewrote half of the script to suit my needs.

maybe you want to read: iptables(8), bash(1), syslogd(8)

hth
buzz