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Title: The IP address is the same as its network address, which is not allowed! Post by: Goetz on Friday 02 March 2012, 01:03:22 am Hey,
sorry for a n00bish question. I'm trying to add extra IPs I've got from my Interenet Provider. For now I've got configured Ethernet Static uplink with following options: IP address: 87.204.168.224 Netmask: 255.255.255.224 Default gateway: 87.204.168.225 Primary DNS: 87.204.204.204 Secondary DNS: 62.233.233.233 On Endian Firewall panel I go to Network -> Interfaces -> Edit uplink of my main uplink after that I press: "Add additional addresses (one IP/Netmask or IP/CIDR per line)" and add following: "87.204.168.227/255.255.255.224" When I update all changges I get "The IP address '87.204.168.224/27' is the same as its network address, which is not allowed!" Any ideas how to fix it ? Thanks in advance for any help Title: Re: The IP address is the same as its network address, which is not allowed! Post by: mrkroket on Friday 02 March 2012, 11:50:04 am Because it's true. Any subnet has 2 special IP's, the first and the last.
The first one is called the network address, it's usually the .0 on netmask 255.255.255.0, but not in other netmasks. In your case, the 87.204.168.224/27 is indeed your network address, and shouldn't be used. Your IP ranges are 7.204.168.224 - 7.204.168.255, and neither the first (7.204.168.224) nor the last (broadcast IP: 7.204.168.255) can be used by single machines. What I don't know is why endian lets you in the first case... Always use an CIDR calculator for any IP/CIDR stuff: http://www.subnet-calculator.com/cidr.php (http://www.subnet-calculator.com/cidr.php) More info about subnet Id and broadcast IP on http://en.wikipedia.org/wiki/IPv4_subnetting_reference (http://en.wikipedia.org/wiki/IPv4_subnetting_reference) Title: Re: The IP address is the same as its network address, which is not allowed! Post by: Goetz on Friday 02 March 2012, 09:32:35 pm Thanks a lot that worked and explained a lot of thing to me.
I've got twoj more question. 1. In simple way my network looks like this: ISP Router -> switch -> endian Red Interface IP: 87.204.168.226 Green Interface IP: 196.192.168.0.1 Two other machines with external IP 87.204.168.23x. I can't ping any of these IPs (87.204.168.226 nor 87.204.168.23x) only ping that works is router IP (Default gateway 87.204.168.225). Is it because of wrong endian configuration or problem is my ISP's router ? 2. I wanna forward all FTP connections comming from 87.204.168.226 to Green zone computer (192.168.0.16). I set up my "Port forwarding / Destination NAT" rule like in attachments When I try to connect via Total Commander via 192.168.0.16 it works but not via external IP 87.204.168.226 I tried tracerouting (using network-tools.com) my Gateway IP and My Endian IP, while traceroute for Gateway works Endian don't. Code: TraceRoute to 87.204.168.225 [gate.stomil-poznan.pl] Code: TraceRoute to 87.204.168.226 [stomil-poznan.pl] |