Nov 082010
 

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

Continue reading »

Mar 192008
 

To add a Static Route in Sun Solaris operating system, you can use the route command. This will dynamically update the Kernel IP Routing table. However, when a server is restarted, these routes will be lost. To prevent this from happening, add a startup script S76static-routes with all the route commands for the static route that needs to persist. This will ensure that the route gets added at boot time.

Continue reading »

Mar 192008
 

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. While this is a job for the network router, Servers with multiple interfaces connected to different network can perform this action as well. This behaviour as a router is a default in Sun Solaris Operating Systems.

Continue reading »

Jan 212008
 

There is every little chance that one loses or rather forgets the root password of his Sun Solaris servers. In the event, this happens, there is a way out of it. Well the way and infact the only way is to reset the password as there is no way to recover it. Recovering/restting the password involves booting the server in Single User mode and mounting the root file system.

Continue reading »

Jan 102008
 

Syslog daemon in Solaris by default is enabled for remote logging and will listen on UDP port 514 for syslog messages from remote systems. Unless, the server is acting as a remote logging server, this can be a Security issue as a malicious user can launch a Denial Of Service (DoS) attack on the server.

Continue reading »