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Solaris

Solaris Security – Disable ICMP Redirect in Sun Solaris

2007-12-12
By: admin
In: Security, Solaris
Tagged: icmp-redirect, ipv4, ipv6, nddconfig, routing-table, Security, Solaris, sun-solaris

Solaris Operating Environment by default is configured to both accept and send  the ICMP Redirect messages. According to RFCs, only a router or a gateway device should send an ICMP Redirect message and any other hosts should only be able to receive the ICMP Redirects. If the Solaris server is not acting as a Router or a Gateway then sending ICMP Redirect message should be disabled. The same applies to accepting ICMP Redirect messages if the solaris server is not required to receive ICMP Redirect messages (say a single Router/Gateway network/subnets scenario) as a malicous hacker could send fake ICMP redirect messages to modify theRead More →

HowTo: Add or Edit the DNS servers in Sun Solaris

2007-11-20
By: admin
In: DNS, Solaris
Tagged: DNS, domain, nameserver, resolver, Solaris, sun

Domain Name Service (DNS) is a system which translates the meaningful Hostnames and Domain Names into valid IP Addresses. A DNS Client or a Resolver is a host or a network device which queries the DNS servers for various resource records like the IP Address for a host like a Mail Server.Read More →

HowTo: Change Default Gateway or Default Router in Sun Solaris

2007-11-20
By: admin
In: Networking, Solaris
Tagged: default-gateway, default-router, route, Solaris, sun

The Default Gateway or the Default Router is the IP address (IPv4) to which all the traffic to any target destination(s) which does not have a route in the Routing Table of the server will be forwarded. This Default Gateway is maintained in the file /etc/defaultrouter [IPv4 only]Read More →

HowTo: Change IP Address in Solaris 10 without reboot

2007-11-20
By: admin
In: Networking, Solaris
Tagged: ip-address, Solaris, solaris-10

Adding or editing the IP address on a Solaris 10 server is different from the previous versions of the OS (Solaris 9, Solaris 8 etc). In the previous versions of the Solaris Operating System, you need to edit the /etc/hosts file and add/edit the entry for the IP address and the hostname.Read More →

HowTo: Add a Static Route (persistent) in Sun Solaris

2007-11-07
By: admin
In: Networking, Solaris
Tagged: netstat, route, Solaris, static

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.Read More →

Disable IP Forwarding in Solaris Operating System

2007-10-29
By: admin
In: Networking, Solaris
Tagged: forwarding, ip, ndd, packet, Security, Solaris, sun

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.Read More →



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