From the category archives:
Determine the autonegotiated ethernet connection speed and duplex using the mii-tool command. Running the following command as superuser with no options will generate basic information about all of the ethernet interfaces on the computer: [root@server2 ~]# mii-tool
{ 0 comments }
Whether you are troubleshooting network problems or trying to set up a VPN…, knowing what address your computer has configured as the default gateway is always useful. Running a simple command from the terminal can give you this. root@lifelinux:~# route -n Sample outputs: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface […]
{ 0 comments }
Many malicious attacks begin with a ping scan. Disabling ICMP echo requests prevents your system’s discovery with a ping. Disable ICMP echo responses temporarily You can temporarily disable the ICMP using the following method but this setting will be erased after the reboot. root@lifelinux:~# echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all
{ 0 comments }
#!/bin/sh # A simple shell to build a Firewall anti SYN Flood # Under CentOS, Fedora and RHEL / Redhat Enterprise Linux # servers. # —————————————————————————- # Written by LongVNIT # (c) 2009 lifeLinux under GNU GPL v2.0+ IPT=”iptables” MODPROBE=”modprobe” IF=”eth0″ IP=”192.168.1.112″ PORT=”22 80 443″ CHECK_TIME=60 BAN_TIME=120 HITCOUNT=10 MOD=”ip_tables ip_conntrack iptable_filter ipt_state” # Load Module […]
{ 1 comment }
Load balancing helps provide redundancy to your website. However, one often asked question is how to keep your content synchronized on each server. If you put a new web page on one server, how does it get copied over to the second server? In this article, i’ll explain how to use rsync command to synchronize […]
{ 0 comments }
If you want to SSH login without password or automate your task between two servers, you need to setup SSH login via certificate.
{ 5 comments }