Port 139 (Net BIOS) open.

Question

Level 1

0 points

Port 139 (Net BIOS) open.

Recently I noticed when running the firewall port test at hackerwatch.org all ports except one are listed as "closed but unsecure". The open port 139 (Net BIOS) is listed as "Open and Unsecure". Has anyone experienced this? I'm trying to find out if this was caused after the recent AEBS update or possibly due to something else. I thought maybe this was an issue with the OS X firewall so I installed Intego's NetBarrierx4, set it to the highest security settings and still see the same results.

Note: The MacBook Pro is accessing the internet via the internal wireless Airport card to the AEBS which is connected to a Broadband Motorola SB5100 DHCP cable modem. The AEBS security setting is configured for WPA2 Personal and the network is running 802.11n.

MacBook Pro, Mac OS X (10.4.9), Core 2 Duo

Posted on May 20, 2007 12:24 AM

Reply

Answer 1

Dark_Knight Author

Level 1

0 points

May 21, 2007 3:35 PM in response to Dark_Knight

Update: There is a problem with Apple's Airport Extreme Base Station handling of ports when sharing connected external hard drives across the network. If a user selects "Share disks over Ethernet WAN" then ports 139, 445 and 548 are left open. I unchecked this option and now all ports are closed, still visible but at least closed. The ability of having remote access to the externel network hard drive while on the road is useful for my line of work but not at the expense of losing security. Hopefully Apple can provide an firmware update to resolve this issue.

Reply