Tag Archives: scripting

recap utility 

# Install recap
git clone https://github.com/rackerlabs/recap.git
cd recap
./recap-installer 


# If there is no MySQL or it can;t connect to it edit:
/etc/recap
                                USEMYSQL=no
                                USEMYSQLPROCESSLIST=no

Edit cron if you want to run often than 10 minutes:
                                /etc/cron.d/recap 


=================================================

LOG ANALYSIS SCRIPTS

>> Check for memory usage
grep "buffers/cache" /var/log/recap/resources_* | sed 's/^.*resources_\(.*\)\.log.*cache:\s*\([0-9]*\)\s*\([0-9]*\)$/FREE: \3| USED: \2| DATE: \1/ '

>> Running the following to check if the memory went less than 4999MB
grep "buffers/cache" /var/log/recap/resources_* | sed 's/^.*resources_\(.*\)\.log.*cache:\s*\([0-9]*\)\s*\([0-9]*\)$/FREE: \3| USED: \2| DATE: \1/ ' | egrep -v "FREE: [65][0-9]{3}\|" | wc -l

 

ftp/sftp – vsftpd 

# VSFTPD chroot configuration

>> Create a no-shell user
useradd -d $HOME_PATH -s /sbin/nologin $FTPUSER && passwd $FTPUSER

!!!MAKE SURE TO CHMOD 755 the parent directory!!!

yum -y install vsftpd

chkconfig vsftpd on

sed -i -e 's/IPTABLES_MODULES=""/IPTABLES_MODULES="ip_conntrack_ftp"/g' /etc/sysconfig/iptables-config

modprobe ip_conntrack_ftp

echo "rack" >> /etc/vsftpd/vsftpd.chroot_list

mv /etc/vsftpd/vsftpd.conf /etc/vsftpd/vsftpd.conf.ORIG

cat >/etc/vsftpd/vsftpd.conf <<EOF
# vsftpd.conf - PASSIVE
anonymous_enable=NO
local_enable=YES
write_enable=YES
local_umask=022
dirmessage_enable=YES
xferlog_enable=YES
listen_port=21
connect_from_port_20=YES
xferlog_std_format=YES
listen=YES
pam_service_name=vsftpd
userlist_enable=YES
tcp_wrappers=YES
pasv_min_port=60000
pasv_max_port=65000

# Add in /etc/vsftpd/vsftpd.chroot_list who you do *NOT* want to be chrooted
chroot_local_user=YES
chroot_list_enable=YES
chroot_list_file=/etc/vsftpd/vsftpd.chroot_list

# RackConnect
# pasv_enable=YES
# pasv_min_port=60000
# pasv_max_port=60100
# pasv_address=<publicRCip> (might not be required)

# Logging
xferlog_enable=YES
log_ftp_protocol=NO
syslog_enable=NO
vsftpd_log_file=/var/log/vsftpd.log
EOF

>> Make sure  to comment out "auth   required    pam_shells.so" in /etc/pam.d/vsftpd (errors in authenticate users with /bin/false shell):
sed -i 's/^\(auth.*required.*pam_shells\.so.*$\)/#\1/' /etc/pam.d/vsftpd 

>> Enable firewall ports (in Rackconnect, open the same on the physical firewall):

iptables -I INPUT -p tcp --dport 21 -m comment --comment "FTP" -j ACCEPT
iptables -I INPUT -p tcp -m multiport --dports 60000:65000 -m comment --comment "FTP passive mode ports" -j ACCEPT
/etc/init.d/iptables save

>> Restart the service
service vsfptd restart


If -> vsftpd: refusing to run with writable root inside chroot ()
=> allow_writable_chroot=YES

=======================================================

SFTP Jailed: 
!!!! remember that the users home directory must be owned by root 

groupadd sftponly

>> 1 domain managed by 1 or more users:
    useradd -d /var/www/vhosts -s /bin/false -G sftponly bob

>> 1 user managing multiple domains:
    useradd -d /var/www/vhosts -s /bin/false -G sftponly bob

SFTPUSER=bob
SFTPUSERPASS=$(tr -cd '[:alnum:]' < /dev/urandom | fold -w12 | head -n1)
echo "$SFTPUSERPASS" | passwd --stdin $SFTPUSER && echo -e "\nsfptuser: $SFTPUSER\npassword: $SFTPUSERPASS" 


>> /etc/ssh/sshd_config
#Subsystem sftp /usr/libexec/openssh/sftp-server
Subsystem sftp internal-sftp

>> 1 domain managed by 1 or more users:
Match Group sftponly
   ChrootDirectory %h
   X11Forwarding no
   AllowTCPForwarding no
   ForceCommand internal-sftp

>> 1 user managing multiple domains:
    Match Group sftponly
         ChrootDirectory /var/www/vhosts/%u
         X11Forwarding no
         AllowTCPForwarding no
         ForceCommand internal-sftp

sshd -t
service sshd restart 

>> Set correct permissions!!!
chmod 755 /var/www/
chown root:root /var/www
chown -R root:sftponly /var/www/*
find /var/www/ -type d | xargs chmod 2775
find /var/www/ -type f | xargs chmod 644