IP alias can't reach default gateway

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Isidro Jose Hortelano

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Oct 5, 2021, 10:40:11 AMOct 5
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Hello,

I'm having an odd issue, I have configured a  server with a primary address and secondary IP through IP alias. I added the secondary as static IP in /etc/sysconfig/network/ifcfg-eth0.
cat /etc/sysconfig/network/ifcfg-eth0 
BOOTPROTO='dhcp'                                                                                                        
STARTMODE='onboot'                                                                                                  
IPADDR_1='10.10.0.100/32'

I'm facing a connection issue when the secondary IP comes first, the outgoing traffic doesn't work, checking with tcpdump I saw that I only have connection when the pkg comes from the primary IP as source.
Can I configure any firewall  rule, routing, etc to avoid this? or  GCP only accepts pkg when the ip src is the primary IP.

Thanks,
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