Difference between revisions of "Troubleshooting DHCP issues"

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[[Main Page|Home]] > [[CentOS]] > [[CentOS 6.x]] > [[Dhcp server configuration]] > [[Troubleshooting DHCP issues]]
=Troubleshooting DHCP issues=


==Restrictive firewall issue==
==Restrictive firewall issue==
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might get appended to /var/log/messages and monitoring systems should pick up these as unknown message.  The problem can be easily resolved by updating firewall to allow outgoing packets to UDP port 67.
might get appended to /var/log/messages and monitoring systems should pick up these as unknown message.  The problem can be easily resolved by updating firewall to allow outgoing packets to UDP port 67.
[[Main Page|Home]] > [[CentOS]] > [[CentOS 6.x]] > [[Dhcp server configuration]] > [[Troubleshooting DHCP issues]]

Latest revision as of 11:07, 14 July 2022

Home > CentOS > CentOS 6.x > Dhcp server configuration > Troubleshooting DHCP issues

Restrictive firewall issue

DHCP will not work if outgoing packets to UDP port 67 are not allowed in firewall. In such cases messages:

Failed to send 300 byte long packet over fallback interface

might get appended to /var/log/messages and monitoring systems should pick up these as unknown message. The problem can be easily resolved by updating firewall to allow outgoing packets to UDP port 67.



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