Depending on your system and network configuration, a user who starts a SLIP connection might be able to access another system in your network without signing on to your system.
For example, a user could establish a SLIP connection to your system. Then the user could establish an FTP connection to another system in your network that does not allow dial-in.
You can prevent a SLIP user from accessing other systems in your network by specifying N (No) for the Allow IP datagram forwarding field in the configuration profile. This prevents a user from accessing your network before the user logs on to your system. However, after the user has successfully logged on to your system, the datagram forwarding value has no effect. It does not limit the user’s ability to use a TCP/IP application on your iSeries™ system (such as FTP or TELNET), to establish a connection with another system in your network.