August 2003
Intermediate to advanced
816 pages
28h 15m
English
book
Managing Linux® Systems with Webmin™ System Administration and Module Development
by Jamie Cameron
Content preview from Managing Linux® Systems with Webmin™ System Administration and Module Development
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19.4. Changing a Chain's Default Action
Packets that do not match any rule in a chain will be processed using the default action, which is usually to accept the packet. On the module's main page, the default action for each chain is shown next to the Set default action to button. To change it, the steps to follow are:
1. | Select the new action from the menu next to the Set default action to button. Only the Accept, Drop, Userspace, and Exit chain actions are available—see Section 19.3 “Allowing and Denying Network Traffic” for their meanings. Typically, only Allow and Drop make sense as default actions. |
2. | Click the Set default action to button to save the new default. |
3. | If changing to Drop, add any additional firewall rules needed so that your ... |
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