tcpdrop is a free utility to drop an established TCP connection in Sun solaris. It is a port of the tcpdrop utility from FreeBSD and openBSD. tcpdrop doesn’t do what it says on the tin and nothing more but does it very well. tcpdrop works in Solaris 10,9,8
tcpdrop – Drop TCP connections in Solaris Read More »
For long we used Tracking IP basd IPMP wherein we track the availability of a gateway on the network using ICMP Echo request. When the gateway IP fails to respond it is considered link is unavailable and NIC fails over to the standby NIC in the IPMP group.
Configure Link based IPMP in Solaris Read More »
In the past we have to mess around with the NDD commands and stats tools like kstat to find the network link status, speed, duplex information in Sun Solaris. With Solaris 10, this has become much easier with the dladm utility. dladm is the admin utility for Data-Link Interface which helps to display informarthe like
dladm – Display Link status,speed,duplex,statistics,MTU Read More »
PCP is a very useful security and adminitration script that can help you quickly find Processes (PIDs) having particular TCP Port(s) open, TCP ports open by specific PIDs or even list all the TCP Ports open by all PIDs running on your system.
PCP script to find open TCP ports and PIDs related in Solaris Read More »
Setting up a Sun Solaris Server to receive its IP address from a DHCP Server is fairly straight forward and is infact just a matter of setting up files on your Solaris Server.
How to setup DHCP client in Sun Solaris Read More »
Everytime you reboot your Sun Solaris Server, you may find that one or more of your Network Interfaces may not come online. If you did a “netstat -r” sunsolaris# netstat -r Routing Table: IPv4 Destination Gateway Flags Ref Use Interface ——————– ——————– —– —– —— ——— BASE-ADDRESS.MCAST.NET solaris10 U 1 0 hme0 default 192.168.0.1
Network Interface may not come up online at reboot in Solaris Read More »
Just as we saw modifying the caching time for ARP entries in the ARP table here. We can modify the default time that a sun Solaris system can hold the routing entries. The default time for which a dynamically learnt Route entry in the routing table is 20mins (1200000ms)
Increase/Decrease route flushing time period in Solaris Read More »
Not so often we would end up troubleshooting or manipulating ARP and ARP tables in Sun Solaris. However, following are some of the useful commands which can help when required. The following commands will help you display,modify,add,delete ARP entries in Sun Solaris ARP table.
Display/Add/Delete/modify ARP entries in ARP Table Read More »
ARP attacks are the easiest attacks that can be launched on a network or a Server causing a Denial of Service. One of those things that can be done on the Sun Solaris Operating System is to alter the caching time for the ARP cache whch reduces the time that a rogue ARP entry stays
Reduce ARP caching time in Sun Solaris using ndd Read More »
IP packet forwarding is the process of routing packets between network interfaces on one system. A packet arriving on one network interface and addressed to a host on a different network is forwarded to the appropriate interface. In Solaris 10, IP Forwarding can be enabled or disabled using the routeadm & ifconfig commands as against
Enable/Disable IP Forwarding in Solaris 10 without reboot Read More »