1 | Configuring Unbound |
---|
2 | ------------------- |
---|
3 | |
---|
4 | 1. Log in using SSH/Putty/... to your RESOLVER machine: |
---|
5 | |
---|
6 | (i.e. for group 1, you would use resolv.grp1.ws.nsrc.org) |
---|
7 | |
---|
8 | $ ssh -l adm resolv.grpXX.ws.nsrc.org |
---|
9 | |
---|
10 | *** PLEASE MAKE SURE YOU ARE LOGGED IN TO YOUR 'RESOLV' MACHINE, AND *** |
---|
11 | *** NOT IN YOUR 'AUTH1' or 'AUTH2' *** |
---|
12 | |
---|
13 | 2. On your RESOLVer machine (which you just logged into |
---|
14 | |
---|
15 | $ cd /usr/local/etc/unbound/ |
---|
16 | $ sudo cp unbound.conf.sample unbound.conf |
---|
17 | |
---|
18 | Now edit the file unbound.conf: |
---|
19 | |
---|
20 | NOTE: Here, remember to use your favorite editor: ee, jed, joe, vi, ... |
---|
21 | |
---|
22 | $ sudo ee unbound.conf |
---|
23 | or |
---|
24 | $ sudo vi unbound.conf |
---|
25 | |
---|
26 | ... and make the following changes: |
---|
27 | |
---|
28 | a) enable listening - find the lines with: |
---|
29 | |
---|
30 | # interface: ... |
---|
31 | # interface: ... |
---|
32 | |
---|
33 | and just under, add this line: |
---|
34 | |
---|
35 | interface: 0.0.0.0 |
---|
36 | |
---|
37 | b) access control - find the lines with: |
---|
38 | |
---|
39 | # access-control: ... |
---|
40 | # access-control: ... |
---|
41 | |
---|
42 | and just under, add this line: |
---|
43 | |
---|
44 | access-control: 10.10.0.0/16 allow |
---|
45 | |
---|
46 | c) chroot security - find the line |
---|
47 | |
---|
48 | # chroot: "/usr/local/etc/unbound" |
---|
49 | |
---|
50 | and just under, add this line: |
---|
51 | |
---|
52 | chroot: "" |
---|
53 | |
---|
54 | NOTE: We would normally not turn off chroot, which is a security |
---|
55 | mechanism, but we need to do this here in the lab, because of |
---|
56 | restrictions from the virtualization environment. In a production |
---|
57 | environment, we wouldn't do this. |
---|
58 | |
---|
59 | d) set the root-hints file - find the line with: |
---|
60 | |
---|
61 | # root-hints: "" |
---|
62 | |
---|
63 | and just under, add this line: |
---|
64 | |
---|
65 | root-hints: "/usr/local/etc/unbound/named.root" |
---|
66 | |
---|
67 | e) re-enable the 10.in-addr.arpa zone - find the line with: |
---|
68 | |
---|
69 | # local-data-ptr: "192.0.2.3 www.example.com" |
---|
70 | |
---|
71 | and just under, add this line: |
---|
72 | |
---|
73 | local-zone: "10.in-addr.arpa." nodefault |
---|
74 | |
---|
75 | f) enable remote control - find the line with: |
---|
76 | |
---|
77 | # control-enable: no |
---|
78 | |
---|
79 | and CHANGE it (by removing # in front) to: |
---|
80 | |
---|
81 | control-enable: yes |
---|
82 | |
---|
83 | - find the line with: |
---|
84 | |
---|
85 | # control-interface: 127.0.0.1 |
---|
86 | |
---|
87 | and CHANGE it to: |
---|
88 | |
---|
89 | control-interface: 0.0.0.0 |
---|
90 | |
---|
91 | - find the line with: |
---|
92 | |
---|
93 | # control-port: 8953 |
---|
94 | |
---|
95 | and CHANGE it to: |
---|
96 | |
---|
97 | control-port: 953 |
---|
98 | |
---|
99 | - finally, uncomment the following lines: |
---|
100 | |
---|
101 | # server-key-file: "/usr/local/etc/unbound/unbound_server.key" |
---|
102 | becomes |
---|
103 | server-key-file: "/usr/local/etc/unbound/unbound_server.key" |
---|
104 | |
---|
105 | # server-cert-file: "/usr/local/etc/unbound/unbound_server.pem" |
---|
106 | becomes |
---|
107 | server-cert-file: "/usr/local/etc/unbound/unbound_server.pem" |
---|
108 | |
---|
109 | # control-key-file: "/usr/local/etc/unbound/unbound_control.key" |
---|
110 | becomes |
---|
111 | control-key-file: "/usr/local/etc/unbound/unbound_control.key" |
---|
112 | |
---|
113 | # control-cert-file: "/usr/local/etc/unbound/unbound_control.pem" |
---|
114 | becomes |
---|
115 | control-cert-file: "/usr/local/etc/unbound/unbound_control.pem" |
---|
116 | |
---|
117 | |
---|
118 | Save the file, exit. |
---|
119 | |
---|
120 | You still need to copy named.root root hints file where unbound |
---|
121 | can find it. |
---|
122 | |
---|
123 | $ cd /usr/local/etc/unbound |
---|
124 | $ sudo cp /etc/namedb/named.root . |
---|
125 | |
---|
126 | 3. Create the control keys: |
---|
127 | |
---|
128 | $ sudo unbound-control-setup |
---|
129 | |
---|
130 | 4. Test the configuration: |
---|
131 | |
---|
132 | $ sudo unbound-checkconf |
---|
133 | |
---|
134 | 5. edit /etc/rc.conf and add: |
---|
135 | |
---|
136 | unbound_enable="YES" |
---|
137 | |
---|
138 | 6. start unbound! |
---|
139 | |
---|
140 | $ sudo service unbound start |
---|
141 | |
---|
142 | 7. Change your /etc/resolv.conf to use your newly configured Unbound, |
---|
143 | on this machine (RESOLV), but on AUTH1 and AUTH2 as well: |
---|
144 | |
---|
145 | # vi /etc/resolv.conf |
---|
146 | |
---|
147 | Change the nameserver line to: |
---|
148 | |
---|
149 | nameserver 10.10.XX.3 |
---|
150 | |
---|
151 | ... where XX is the number of your group |
---|
152 | |
---|
153 | 8. Test |
---|
154 | |
---|
155 | $ dig |
---|
156 | $ dig noc.ws.nsrc.org |
---|
157 | |
---|
158 | Make sure you see SERVER: ...(10.10.XX.3) at the bottom of |
---|
159 | dig's output. |
---|
160 | |
---|
161 | $ dig version.bind txt chaos |
---|
162 | |
---|
163 | What does the output say ? |
---|
164 | |
---|
165 | 9. In a previous lab, you may have configured BIND on the AUTH1 host |
---|
166 | to function as a recursive. |
---|
167 | |
---|
168 | If so, now is the time to turn it off. |
---|
169 | |
---|
170 | NOTE: You do NOT need to do this unless you have enabled recursion |
---|
171 | in your BIND config. |
---|
172 | |
---|
173 | So we need to go on our AUTH1 host, and change the resolv.conf. |
---|
174 | |
---|
175 | Log on to your master (auth1.grpX.ws.nsrc.org), and change the |
---|
176 | /etc/resolv.conf so that it now uses your newly configured unbound: |
---|
177 | |
---|
178 | $ sudo ee /etc/resolv.conf |
---|
179 | |
---|
180 | And make it look like this: |
---|
181 | |
---|
182 | search ws.nsrc.org |
---|
183 | nameserver 10.10.X.3 |
---|
184 | |
---|
185 | |
---|
186 | ... where X is the number of your group |
---|
187 | |
---|
188 | Then test that you can resolv *.ws.nsrc.org names: |
---|
189 | |
---|
190 | $ dig noc.ws.nsrc.org |
---|
191 | |
---|
192 | Check the SERVER: statement at the bottom of the dig output to |
---|
193 | make sure you are running with the correct server |
---|
194 | |
---|
195 | Finally, turn off recursion on the AUTH1 host. |
---|
196 | |
---|
197 | Edit /etc/namedb/named.conf (sudo ee ...) and make the following changes: |
---|
198 | |
---|
199 | From this: |
---|
200 | |
---|
201 | allow-recursion { 127.0.0.1; 10.10.0.0/16; }; |
---|
202 | |
---|
203 | To this: |
---|
204 | |
---|
205 | // allow-recursion { 127.0.0.1; 10.10.0.0/16; }; |
---|
206 | recursion no; |
---|
207 | |
---|
208 | If these statements aren't there, don't worry, just skip this step! |
---|
209 | |
---|
210 | Save the file, and restart named: |
---|
211 | |
---|
212 | $ sudo service named restart |
---|