While working with APF on servers, you might normally get to see the following error,
# apf -r
apf(2042): {glob} flushing & zeroing chain policies
apf(2042): {glob} firewall offline
apf(3179): {glob} activating firewall
apf(3284): {glob} unable to load iptables module (ip_tables), aborting.
apf(3179): {glob} firewall initalized
apf(3179): {glob} fast load snapshot saved
Your kernel is compiled with iptables statically instead of as a [...]
Continue reading about apf fix: unable to load iptables module (ip_tables)
Unable to add a new block for an ip via CSF? Iptables modules are not loaded into your server’s kernel.
If you’re getting the following error on a OpenVZ VPS server:
iptables: No chain/target/match by that name
ACCEPT udp opt — in !lo out * 0.0.0.0/0 -> 0.0.0.0/0 state NEW udp dpt:953
Contact the DC to make a small [...]
Continue reading about CSF Fix: iptables: No chain/target/match by that name
Out of memory? Did you upgrade your OS recently? Then carefully have a look at ps -auwx output for memory consumption.
Today I found that initscripts package owned minilogd was eating up almost 70% of the server resources on a VPS running on OpenVZ virtualization. After reading a bit about it on the internet I found [...]
Are you getting the following error while you SSH into the VPS server?
ssh_exchange_identification: Connection closed by remote host
You might get the following when you try entering the same VPS via Hardware Node.
[root@vps1 ~]# vzctl enter 100
Unable to fork: Cannot allocate memory
To resolve this issue, you must check the resource usage of this VPS server. This [...]
To trouble shoot this issue, first get into the server from the Hardware node so that you can quickly resolve this issue as a VPS Administrator.
You might face few issues which I have reported in my earlier posts :
Unable to open pty: No such file or directory
tty device is not owned by group `tty’
If any [...]
Continue reading about Unable to access VPS via SSH – CentOS5 on OpenVZ
Unable to access the VPS via SSH? Are you getting the following error?
# vzctl enter 1022
enter into VE 1022 failed
Unable to open pty: No such file or directory
Fix:
# vzctl exec 1022 /sbin/MAKEDEV pty
# vzctl exec 1022 /sbin/MAKEDEV tty
# vzctl enter 1022
To Fix this issue permanently,
1. Edit the file /etc/rc.sysinit of the VPS server (Here VEID [...]
Continue reading about Unable to open pty: No such file or directory
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