Linux and Unix tutorials for new and seasoned sysadmin
Linux and Unix tutorials for new and seasoned sysadmin
I‘ve Atheros AR5001 wifi a/b/g card detected and supported natively under Linux. How do I configure my wireless card with WPA2 networking using /etc/network/interfaces file?
How do I send gratuitous ARPs under Linux? How do I tell my DUMMY router that the IP is over here now, under Linux operating systems?
How do I block particular IP addresses or host with the iptables command under Linux?
Continue reading “Iptables Drop IP Address”
How do I redirect 80 port to 8123 using iptables?
How do I invert a protocol or ip address test while writing iptables based shell scripts?
I’ve root ssh access and need to add / delete a few IP address on fly using the IPtables command via local shell script. How do I add or delete an IP address remotely over the SSH session under CentOS / Redhat / RHEL / Debian / Ubuntu Linux?
Q. Recently we made changes to our server hardware and swapped all IP address from old to a new server. However, 2 IP addresses are not get updated due to arp cache issues (IPs are cached on the router). They are going to other servers. How do I solve this problem under Redhat Enterprise Linux version 5.0 or any other Linux distribution?
Continue reading “Router ARP Cache is Not Releasing Linux / UNIX Server IP address”