greetings. I recently upgraded from 56k dialup to an adsl connection. I'm using a Netcomm NB1400 ethernet ADSL modem/router and I'm wondering if anyone can help me with a few questions. I'm concerned about what shows up when I do a remote port-scan of the modem with nmap: 139/netbios-ssn, 10000/snet-sensor-mgmt, 10005/stel, and 10082/amandaidx - all come up as "open". Running a few of the web-based scans around the net I'm seeing that the modem shows it's unopen ports as "closed". Two things I'd like to do - close the open ports, and have the modem DROP outside connection attempts rather than REJECT them.
I imagine this to be a fairly generic adsl modem/router question so maybe someone can point me to a way to change these settings in my modem. The modem is not exactly thoroughly documented - there are many commands that fail to make it into the manuals, and of the commands that I've figured out through trial and google searches, there's nothing to indicate the ability to close ports off and change the modem's defaults for connection attempts. I'm nervous - I don't trust the modem to take care of _itself_ from attacks. Inside, I'm firewalled, and this is ok, but I'm concerned that the security of the modem itself will be compromised. Would there be a security gain by port forwarding _everything_ and trusting the internal linux firewall to handle everything? would there be much of a performance tradeoff with this approach? very grateful for any suggestions. cheers Dennis. __________________________________________________ Do You Yahoo!? Sign up for SBC Yahoo! Dial - First Month Free http://sbc.yahoo.com -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
