SMB/CIFS connection timeout kernel-3.10.0-957.21.3.el7

After upgrading to kernel-3.10.0-957.21.3.el7 on a CentOS server, I experienced connection timeout issues on Windows servers trying to access SMB shares. On the contrary, I was able to access the share using a Linux system without any problem. The bug was reported in CentOS Bug Tracker and it’s caused by one of the patches applied… Continue reading “SMB/CIFS connection timeout kernel-3.10.0-957.21.3.el7”

Kernel modules

/lib/modules stores kernel drivers and Linux loads the modules it needs when it boots. lsmod shows modules that are currently loaded. Module Size Used by ccm 20480 6 ip6t_rpfilter 16384 1 ip6t_REJECT 16384 2 nf_reject_ipv6 16384 1 ip6t_REJECT xt_conntrack 16384 13 ip_set 36864 0 nfnetlink 16384 1 ip_set ebtable_nat 16384 1 ebtable_broute 16384 1 bridge… Continue reading “Kernel modules”