subnet

问题 I'm trying to generate a random IP address given a subnet of IP address. There are plenty of resources available to generate a random IP, but my requirement it to have it generated from within a specific subnet. I've used an npm module called netmask - however the implementation is absolutely not elegant. Can anyone please give some slick pointers to this? var netmask = require("netmask").Netmask var block = new netmask('10.0.0.0/24') console.log(block) // gives block details var blockSize =

问题 I'd like to find a way to do a SQL query that will calculate the cidr (bit representation) of a subnet mask stored in the database. So for example, I've got either 255.255.255.0 or its decimal value (4294967040) stored in the database. I'd like to do a select and get back /24 representation via the query. I've done things like the following to determine the last IP of a subnet so I'm hoping to do something similar to determine the cidr representation of a mask. select concat(inet_ntoa(ip_addr

问题 Dears I was planning to extract my Subnet mask, I had used the below code but the subnetmask is always 255.255.255.255 which is wrong import socket # Import socket module import netifaces def get_ip_address(): s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) s.connect(("8.8.8.8", 80)) My_ip=s.getsockname()[0] s.close() return My_ip def main(): #print(netifaces.interfaces()) for i in netifaces.interfaces(): try: # Address print("IP Address: ", netifaces.ifaddresses(i)[netifaces.AF_INET][0]

问题 I am creating a basic AWS CloudFormation Template with one VPC, 3 Security Group and 5 EC2 Instances my security group looks something like this - { "WebApplicationServerSG": { "Type": "AWS::EC2::SecurityGroup", "Properties": { "VpcId": { "Ref": "DevVpc" }, "GroupDescription": "Enable HTTP, HTTPS and SSH access", "Tags": [ { "Key": "Name", "Value": "WebApplicationServer Service Group" } ], "SecurityGroupIngress": [ { "IpProtocol": "tcp", "FromPort": "443", "ToPort": "443", "CidrIp": "0.0.0.0

问题 Lets suppose I get given the network (57.70.32.0/21) and I need to divide it into 4 equally sized networks. I know the mask at the moment is (255.255.248.0) but would I need to change the prefix length of the network given to 26 so I can get the 4 equal size subnets? Basically that's my biggest question and also if I should then use the 4th octet for subnetting or stay with the 3rd to do it. Any help would be extremely appreciated. 回答1: you can divide your ips into 4 networks with 510 IPs

问题 How can I calculate the subnetmask in Python if I have the first and the last ip adresses in a range? I want the netmask as e.g. 255.255.255.0. Thanks ;) 回答1: Say that we have... def ip_to_int(a, b, c, d): return (a << 24) + (b << 16) + (c << 8) + d Then you can have the representation doing a few XORs. Eg. >>> bin(0xFFFFFFFF ^ ip_to_int(192, 168, 1, 1) ^ ip_to_int(192, 168, 1, 254)) '0b11111111111111111111111100000000' So: def mask(ip1, ip2): "ip1 and ip2 are lists of 4 integers 0-255 each"

问题 How can I calculate the subnetmask in Python if I have the first and the last ip adresses in a range? I want the netmask as e.g. 255.255.255.0. Thanks ;) 回答1: Say that we have... def ip_to_int(a, b, c, d): return (a << 24) + (b << 16) + (c << 8) + d Then you can have the representation doing a few XORs. Eg. >>> bin(0xFFFFFFFF ^ ip_to_int(192, 168, 1, 1) ^ ip_to_int(192, 168, 1, 254)) '0b11111111111111111111111100000000' So: def mask(ip1, ip2): "ip1 and ip2 are lists of 4 integers 0-255 each"

问题 I want to order Public Secondary IP Addresses when I ordering. And How to submit these order infomation by softlayer api ? 回答1: To submit the order information described above, you need to fill the parameter "itemCategoryQuestionAnswers" during the order, that parameter can be found in datatypes like Container_Product_Order_Virtual_Guest and Container_Product_Order_Hardware_Server Below is an example in JSON for REST: "itemCategoryQuestionAnswers":[ { "answer": "2", "categoryId": 14,

问题 The problem I have is that I basically would like to find if there are any free subnets between a BGP aggregate-address (ex: 10.76.32.0 255.255.240.0) and all the network commands on the same router (ex: 10.76.32.0 255.255.255.0, 10.76.33.0 255.255.255.0) In the above example 10.76.34.0 -> 10.76.47.255 would be free. I'm thinking of tackling this problem by converting the IP addresses and subnet masks to binary and subtracting that way. To keep it simple I will keep this example in decimal

问题 In a bash script I have an IP address like 140.179.220.200 and a netmask like 255.255.224.0. I now want to calculate the Network address(140.179.192.000), first usable Host IP(140.179.192.1), last usable Host IP(140.179.220.254), and the Broadcast Address(140.179.223.255). I was able to find a clean way to do the network address below. I'm able to do subnet calculations by hand, but mainly having difficulties translating that into a bash script. Thanks in advance $ IFS=. read -r i1 i2 i3 i4 <