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An example of using the Salt peer interface to query web server IP addresses and add them to an iptables config.
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| # Firewall configuration written by system-config-firewall | |
| # Manual customization of this file is not recommended. | |
| *filter | |
| :INPUT ACCEPT [0:0] | |
| :FORWARD ACCEPT [0:0] | |
| :OUTPUT ACCEPT [0:0] | |
| -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT | |
| -A INPUT -p icmp -j ACCEPT | |
| -A INPUT -i lo -j ACCEPT | |
| -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT | |
| {% for ipaddr in ipaddrs %} | |
| -A INPUT -p tcp -s {{ ipaddr[0] }} --sport 1024:65535 -d {{ dbserver }} --dport 3306 -m state --state NEW,ESTABLISHED -j ACCEPT | |
| -A OUTPUT -p tcp -s {{ dbserver }} --sport 3306 -d {{ ipaddr[0] }} --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT | |
| {% endfor %} | |
| -A INPUT -j REJECT --reject-with icmp-host-prohibited | |
| -A FORWARD -j REJECT --reject-with icmp-host-prohibited | |
| COMMIT |
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| /etc/sysconfig/iptables: | |
| file.managed: | |
| - source: salt://dbserver/iptables | |
| - user: root | |
| - group: root | |
| - mode: 600 | |
| - template: jinja | |
| - dbserver: {{ salt['publish.publish']('dbserver', 'network.ip_addrs', 'eth1')['dbserver'].pop() }} | |
| - ipaddrs: {{ salt['publish.publish']('*web*', 'network.ip_addrs', 'eth1').values() }} |
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