snet | long lasting connection protocol for mobile applications | Encryption library
kandi X-RAY | snet Summary
kandi X-RAY | snet Summary
+ 客户端连接服务端时,协议采用DH密钥交换算法和服务端之间协商出一个通讯密钥 + 在后续的通讯过程中,双方使用这个密钥对通讯内容进行RC4流式加密 + 通讯双方,均在本地缓存一定量的历史数据,并记录已接收和已发送的字节数 + 当底层TCP/IP连接意外断开时,客户端将新建一个连接并尝试重连,服务端将等待重连 + 当新的连接创建成功,客户端和服务端之间互发已接收和已发送的字节数 + 客户端和服务端各自比对双方的收发字节数来重传数据 + 重连过程中,服务端使用之前协商的通讯密钥验证客户端的身份合法性. + 新建连接时,客户端先发送一个全0的字节告知服务端这是一个新连接 + 接着客户端发送8个字节的握手请求,PublicKey为DH密钥交换用的公钥. + 客户端收到挑战码后,发送16个字节的验证请求 + MD5为收到的挑战码加通讯密钥计算得出的MD5哈希值. + 当服务端收到新建连接请求后,下发24个字节的握手响应 + 消息前8个字节为DH密钥交换用的公钥 + 消息第[8, 16]字节为加密后的连接ID,加密所需密钥通过DH密钥交换算法计算得出 + 消息第[16, 24]字节为挑战码,一个uint64范围内的随机数. 重连,上行: + 当客户端尝试重连时,新建一个TCP/IP连接,并发送一个全1的字节告知服务端这是一个重连 + 接着客服端发送40个字节的重连请求 + 消息前8个字节为连接ID + 消息的[8, 16)字节为客户端已发送字节数 + 消息第[16, 24)字节为客户端已接收字节数 + 消息第[24, 40)字节为消息前24个字节加通讯密钥计算得出的MD5哈希值. + 客户端收到挑战码后,发送16个字节的验证请求 + MD5为收到的挑战码加通讯密钥计算得出的MD5哈希值. + 当服务端接收到重连请求时,对连接的合法性进行验证 + 服务端下发24个字节的重连响应 + 消息前8个字节为服务端已发送字节数 + 消息第[8, 16]字节为服务端已接收字节数 + 消息第[16, 24]字节为重连挑战码 + 验证失败则已发送字节数、已接收字节数、重连挑战码始终为0 + 验证成功则下发服务端已发送字节数、已接收字节数、重连挑战码 + 客户端在收到重连响应后,先发送验证码,然后比较收发字节数差值来读取服务端下发的重传数据. + 当服务器收到重连验证码MD5后,验证合法性;若非法连接则立即断开 + 紧接着服务端立即下发需要重传的数据. + 自定义加密算法 + 重连失败的响应.
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QUESTION
ANSWER
Answered 2021-Jun-01 at 14:51You can also define separate modes for your model for training and inference:
QUESTION
I am getting a 403 forbidden when creating a function app that connects to its storage account via private endpoint inside a vnet. Storage account has firewall default action of 'Deny', and of course if I set it to 'Allow' it will work. I want this as 'Deny', however. Following this microsoft link if the function app and storage account are created in the same region with vnet, subnets, and private endpoints then it's supposed to work so I must be doing something wrong. I also tried changing the region for the storage account and it still resulted in a 403.
Error:
...ANSWER
Answered 2021-May-27 at 11:48It seems that it's a common error message when you create an Azure function where the storage account of the function is added to the Virtual Network, read here for more details.
To resolve it, you can use the local-exec Provisioner to invoke the az CLI command to deny the traffic after all of the provisions are finished.
QUESTION
I was trying to test the scenario of handling external changes to existing resources and then syncing my HCL config to the current state in the next apply. I could achieve that using 'taint' for the modified resource, but TF deleted other resources which were deployed during the first 'apply'. Here is the module code for a VNet with 3 subnets(prod,dmz and app) and 3 NSGs associated. And I tested with modifying one of the NSGs but TF deleted all of the subnets-
VNET-
...ANSWER
Answered 2021-May-11 at 09:49The solution may confuse you. You can separate the GatewaySubnet
from the azurerm_virtual_network
block into an azurerm_subnet
block. The code looks like this:
QUESTION
I have created a Private Azure Kubernetes Service. Now, I need to create a Private EndPoint that connect my existing VNET to the AZ Kubernetes.
...ANSWER
Answered 2021-Mar-10 at 03:02Of course, it's impossible to create a private endpoint in the delegated subnet. See the limitation here for the delegated subnet, it shows you:
cannot be used with a private endpoint if the subnet is delegated
QUESTION
I have a resource group with all of my networking in it. I need to create a VM in another resource group but using the vnets/subnet in the other resource group. It is failing miserably at the cli. Here's the command I'm using:
...ANSWER
Answered 2021-Jan-13 at 01:48The problem is that you have provided a wrong subnet ID, the correct format is that
QUESTION
I'm currently working on a script that gives me the output of every Subnet in an Azure Subscription, with links to the VNet, NSG, and the Route Table. The Route Table Name is currently missing in the script, but I want to focus on fixing the NSG right now. This is what my Script looks like:
...ANSWER
Answered 2020-Dec-24 at 05:57Regarding the issue, please refer to the following script
QUESTION
I'm getting the following error on running terraform apply
after adding an azurerm_storage_share
.
ANSWER
Answered 2020-Oct-19 at 08:20You can use the azurerm_storage_account_network_rules resource to define the Network Rules and remove the Network Rules block defined directly on the azurerm_storage_account
resource.
Also, you can create your file share via using az CLI instead of the separate resource "azurerm_storage_share"
After my validation, with the
QUESTION
I have been looking for a proper way to terraform my internal vm scale set with a INTERNAL load balancer that is not exposed to internet with a public IP. however, the nodes should have access to internet to download some packages that are located in github.
I am facing this issue where the load balancer is deployed as well as the scale set but, I do not have the internet outband connectivity from the nodes of the scale set...
I read this post but it does not tell how to proceed
From my understandings, I should have internet access from my nodes to download package cause I use a standard load balancer, but it does not work.
I am missing something ? I would prefer avoid using a NAT Gateway..
Below is my full terraform script that create RG, Vnet SUbnets, LB rules and finally VMSS and a jumbpox.
...ANSWER
Answered 2020-Aug-12 at 16:46You need a public Load Balancer for Port masquerading SNAT (PAT) the outbound traffic. You can configure both an internal and public LB as indicated in the document Azure you referenced.
Outbound NAT for internal Standard Load Balancer scenarios When using an internal Standard Load Balancer, outbound NAT is not available until outbound connectivity has been explicitly declared. You can define outbound connectivity using an outbound rule to create outbound connectivity for VMs behind an internal Standard Load Balancer with these steps: 1. Create a public Standard Load Balancer. 2. Create a backend pool and place the VMs into a backend pool of the public Load Balancer in addition to the internal Load Balancer. 3. Configure an outbound rule on the public Load Balancer to program outbound NAT for these VMs.
QUESTION
I have the below TF file, which will create a function - FirstFunction. This works perfectly.
...ANSWER
Answered 2020-Aug-04 at 09:01The simplest way is that use the count property in your resources. It can help you create multiple same resources in the same code.
QUESTION
A bit stuck on this one. Going in circles trying to get the NSG Ids listed out for each and every subnet in Azure. It's part of a security control requirement, so we need to list each subnet and then provide the NSG Id with them - to show that each subnet does in fact have an NSG associated with it.
...ANSWER
Answered 2020-Jul-21 at 16:48This should do it.
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