dual home network slow response
slow response on linux centos dual home nic on a load balancer down stream smtp solution is echo 2 > /proc/sys/net/ipv4/conf/eth0/rp_filter echo 2 > /proc/sys/net/ipv4/conf/eth1/rp_filter echo 2 > /proc/sys/net/ipv4/conf/eth2/rp_filter also modify /etc/sysctl.conf # Controls source route verification (previously 1) net.ipv4.conf.default.rp_filter = 2 source: https://www.centos.org/forums/viewtopic.php?t=7775