Recent Linux kernels enable ECN by default, which may cause access problems with some websites on bad routers. To check ECN status:
# cat /proc/sys/net/ipv4/tcp_ecn
or
# sysctl net.ipv4.tcp_ecn
To turn it off, use:
# echo "0" > /proc/sys/net/ipv4/tcp_ecn
or
# sysctl -w net.ipv4.tcp_ecn=0
To disable TCP ECN on every boot, edit /etc/sysctl.conf and add:
net.ipv4.tcp_ecn = 0
If you have any further issues, questions, or would like some assistance checking on this or anything else, please reach out to us from your my.hivelocity.net account and provide your server credentials within the encrypted field for the best possible security and support.
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