Firewall
- Use iptables. Configure using sample below.
# Generated by iptables-save v1.2.8 on Fri Feb 3 06:20:08 2006
*mangle
:PREROUTING ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
COMMIT
# Completed on Fri Feb 3 06:20:08 2006
# Generated by iptables-save v1.2.8 on Fri Feb 3 06:20:08 2006
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:FWALL-INPUT – [0:0]
-A INPUT -j FWALL-INPUT# HTTP access
-A FWALL-INPUT -p tcp -m tcp –dport 80 –tcp-flags SYN,RST,ACK SYN -j ACCEPT
# Tomcat access
-A FWALL-INPUT -p tcp -m tcp –dport 8081 –tcp-flags SYN,RST,ACK SYN -j ACCEPT
# incoming SSH
-A FWALL-INPUT -p tcp -m tcp –dport 22 -j ACCEPT
# incoming FTP
-A FWALL-INPUT -p tcp -m tcp –dport 21 -j ACCEPT
# incoming SMTP
-A FWALL-INPUT -p tcp -m tcp –dport 25 -j ACCEPT
# DNS
-A FWALL-INPUT -p tcp -m tcp –dport 53 -j ACCEPT –syn
-A FWALL-INPUT -p udp -m udp –dport 53 -j ACCEPT
-A FWALL-INPUT -p udp -m udp -s 0/0 -d 0/0 –sport 53 -j ACCEPT
# incoming cvs
#-A FWALL-INPUT -p tcp -m tcp –dport 2401 –tcp-flags SYN,RST,ACK SYN -j ACCEPT
# MySQL
#-A FWALL-INPUT -p udp -m udp –dport 3306 -j ACCEPT
#-A FWALL-INPUT -p tcp -m tcp –dport 3306 –tcp-flags SYN,RST,ACK SYN -j ACCEPT
# VZPP
#-A FWALL-INPUT -p tcp -m tcp –dport 4643 –tcp-flags SYN,RST,ACK SYN -j ACCEPT
# CPanel
#-A FWALL-INPUT -p tcp -m tcp –dport 2086 –tcp-flags SYN,RST,ACK SYN -j ACCEPT
# WHM
#-A FWALL-INPUT -p tcp -m tcp –dport 2082 –tcp-flags SYN,RST,ACK SYN -j ACCEPT
# Webmin
#-A FWALL-INPUT -p tcp -m tcp –dport 10101 –tcp-flags SYN,RST,ACK SYN -j ACCEPT
# localhost
-A FWALL-INPUT -i lo -j ACCEPT
# i don’t know
-A FWALL-INPUT -p tcp -m tcp –tcp-flags SYN,RST,ACK SYN -j REJECT –reject-with icmp-port-unreachable
-A FWALL-INPUT -p udp -m udp -j REJECT –reject-with icmp-port-unreachable
# syn flooding protection
-A FWALL-INPUT -p tcp -m tcp –tcp-flags SYN,RST,ACK SYN -m limit –limit 5/sec -j ACCEPT
# Drop all other new requests not meeting any existing rule requirements applied to traffic
-A FWALL-INPUT -p tcp -m tcp -j REJECT –syn
-A FWALL-INPUT -p udp -m udp -j REJECT
COMMIT
# Completed on Fri Feb 3 06:20:09 2006
Miscellaneous
- VIM
- Install vim via yum.
- Set syntax highlight using :syntax on
Go to 1st Step Setup Instruction: Setting up Web Development Server (1/4)
Go to 2nd Step Setup Instruction: Setting up Web Development Server (2/4)
Go to 3rd Step Setup Instruction: Setting up a Development Server (3/4)
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