tag:ask-leo.com,2012://3/tag:ask-leo.com,2004://3.2108- 2012-02-10T23:02:40Z Comments for How can I avoid making an unintentional bridge? Movable Type 4.32-en tag:ask-leo.com,2004://3.2108-comment:63060 Comment from Morpheus Exegis on 2012-01-04 Morpheus Exegis OK i did not read the full article but my 2 cents.

There is no way to accidentally bridge two network connection in any OS. When you are connected to different networks you may get ip conflicts in the following forms:

- dhcp adressing issues - this means that your ip address on one network is similiar to in range or is exactly the same as your ip address on the other network connection. e.g you are 192.168.156.1 and 192.168.156.10 on your two network connections and your subnet is 255.255.255.0 thereby meaning that both ips are in the same range so when you reach out for a network resource your computer does not know which network to use and may go to the unintended network where the resource might be non existent or not what you intended to get to. e.g 192.168.156.3 is my network printer on network 1 and on network 2 it is my fileserver. when i try to reach out to my fileserver it might go to my printer and give me an error statig file not found or resource unavailable.

- gateway errors - these happen when gateway precedence is not set properly. with multiple NICs the ip range the comes first is polled first for resource and if the resource does not exist on that network some Os will return errors while others will poll the second network before returning errors.

the easiest way to do avoid these problems are :

a) have distinct ranges for each network e.g my lab uses 10.x.x.x for internet enabled network. 192.168.x.x for my lan and 169.254.x.x (please do not use this range unless you know what you are doing) for unsecured devices. each range has its gateway defined and when any resource is requested the OS are able to make a call on the closest option for the right path based on past routes, DNS and lookup.

b) binding applications or processes to certain network cards. This ensures that your application only uses that interface for communication. e.g my DLNA broadcast from my media server is bound to NIC1 with ip of 192.168.251.x now any device int his range can see my device and play videos from it but the other NIC 10.10.10.x cannot see any DLNA traffic from this computer so any device on my media server's NIC2 cannot see or play my media server's videos.

the binding option are very easy to find in windows 7. vista will require google help and windows xp with the help of virtualization or other apps. but solutions for each of these methods exist for all OS including MAC, linux, unix bsd etc.

]]>

A comment on: How can I avoid making an unintentional bridge?

Tech Questions? Get Answers! - Ask Leo! ... by Leo Notenboom
Leo's Answers Newsletter - Ask Leo! in your inbox every week.

All content Copyright © 2012.

 2012-01-04T20:43:27Z tag:ask-leo.com,2004://3.2108-comment:11153 Comment from sohel on 2004-09-30 sohel great

]]>

A comment on: How can I avoid making an unintentional bridge?

Tech Questions? Get Answers! - Ask Leo! ... by Leo Notenboom
Leo's Answers Newsletter - Ask Leo! in your inbox every week.

All content Copyright © 2004.

 2004-10-01T06:24:29Z tag:ask-leo.com,2004://3.2108-comment:11152 Comment from Anton on 2004-07-16 Anton Hi!
The best way to do this, is to install a firewall and to see the wireless part as unsafe. A hardware/firmware firewall might be best for this...
Regards,
Anton

]]>

A comment on: How can I avoid making an unintentional bridge?

Tech Questions? Get Answers! - Ask Leo! ... by Leo Notenboom
Leo's Answers Newsletter - Ask Leo! in your inbox every week.

All content Copyright © 2004.

 2004-07-17T06:23:45Z