1. Install kernel-modules-extra and SCTP for the currently installed kernel;
yum install kernel-modules-extra-`uname -r` yum install -y lksctp-tools lksctp-tools-devel lksctp-tools-doc
2. Add sctp to /etc/modules-load.d/* to load sctp before systemd-sysctl.service during boot. Loading sctp before systemd-sysctl.service allows the sctp sysctl.conf settings to be effective;
# cat /etc/modules-load.d/sctp.conf sctp
3. sctp is blacklisted by default on installation. Comment out the blacklisting to enable sctp to be loaded.
# grep sctp /etc/modprobe.d/* /etc/modprobe.d/sctp-blacklist.conf:#blacklist sctp /etc/modprobe.d/sctp_diag-blacklist.conf:#blacklist sctp_diag
4. Reboot (or simply manually load the module, modprobe sctp)
5. Check some command such as ncat provided from the nmap-ncat package to ensure sctp sockets can be created
# lsmod | grep sctp # checking the module is loaded
sctp 409600 4
ip6_udp_tunnel 16384 1 sctp
udp_tunnel 20480 1 sctp
libcrc32c 16384 5 nf_conntrack,nf_nat,nf_tables,xfs,sctp
# ncat --sctp -k -l 127.0.0.1 8192 # creates an sctp socket on the local host at socket number 8192
# In another terminal, check ss
# ss -pneomSa | grep -A 1 8192
LISTEN 0 10 127.0.0.1:8192 0.0.0.0:* users:(("ncat",pid=1912,fd=3)) ino:34833 sk:1 <->
skmem:(r0,rb212992,t0,tb212992,f0,w0,o0,bl0,d0) locals:127.0.0.1
6. Verify SCTP supported or not.
# checksctp SCTP supported
