errors using dns_enum

[Chris Calaf <thelab13 () gmail com>]

Apologies for the double post but first one did not hit the list.

I'm getting the following error when trying to use dns_enum on both BT4 and
Snow Leopard. I installed the macports version of net-dns. Should I be
installing it via CPAN or some ruby port?

 Using ruby 1.9

       =[ metasploit v3.4-dev [core:3.4 api:1.0]
+ -- --=[ 448 exploits - 216 auxiliary
+ -- --=[ 192 payloads - 22 encoders - 8 nops
       =[ svn r7568 updated today (2009.11.18)

msf > use auxiliary/gather/dns_enum
msf auxiliary(dns_enum) > set DOMAIN somedomain.com
DOMAIN => somedomain.com
msf auxiliary(dns_enum) > run

[-] Auxiliary failed: NameError /Users/user/tools/metasploit3/
data/msfweb/vendor/rails/activesupport/lib/active_support/dependencies.rb:105:in
`const_missing': uninitialized constant Net::DNS::RR::OPT
[-] Call stack:
[-]   /Users/user/tools/metasploit3/lib/net/dns/rr.rb:325:in
`new_from_binary'
[-]   (eval):1:in `new_from_binary'
[-]   /Users/user/tools/metasploit3/lib/net/dns/rr.rb:175:in `eval'
[-]   /Users/user/tools/metasploit3/lib/net/dns/rr.rb:325:in
`new_from_binary'
[-]   /Users/user/tools/metasploit3/lib/net/dns/rr.rb:175:in `send'
[-]   /Users/user/tools/metasploit3/lib/net/dns/rr.rb:175:in `parse_packet'
[-]   /Users/user/tools/metasploit3/lib/net/dns/packet.rb:546:in
`new_from_data'
[-]   /Users/user/tools/metasploit3/lib/net/dns/packet.rb:545:in `times'
[-]   /Users/user/tools/metasploit3/lib/net/dns/packet.rb:545:in
`new_from_data'
[-]   /Users/user/tools/metasploit3/lib/net/dns/packet.rb:152:in `send'
[-]   /Users/user/tools/metasploit3/lib/net/dns/packet.rb:152:in `parse'
[-]   /Users/user/tools/metasploit3/lib/net/dns/resolver.rb:979:in `send'
[-]   /Users/user/tools/metasploit3/lib/net/dns/resolver.rb:890:in `query'
[-]   (eval):59:in `switchdns'
[-]   (eval):423:in `run'
[*] Auxiliary module execut

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