ip-addresses | Ip address validation and normalization | TCP library
kandi X-RAY | ip-addresses Summary
kandi X-RAY | ip-addresses Summary
IP address normalizer and validator. For IPv4 and IPv6.
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Top functions reviewed by kandi - BETA
- Normalize IPv6 address .
- Compress an IPv6 address
- Validate if string is an ip address
- Checks if the given string is IPv4
- Checks if given string is an IPv6 address .
ip-addresses Key Features
ip-addresses Examples and Code Snippets
Lines of Code : 22License : Permissive (MIT License)
Copydef count_ip_addresses(S, K):
n = len(S)
if n == 0:
return 0
if n < K:
return 0
dp = [0] * (n + 1)
dp[0] = 1
for i in range(K):
# if you want to save just little calculations you can use min(3*(i+1 
License : No LicenseCopypublic static void main(String[] args) {
System.out.println(restoreIpAddresses("25525511135"));
System.out.println(restoreIpAddresses("0000"));
System.out.println(restoreIpAddresses("1111"));
System.out.println(restore public ArrayList validIPAddresses(String str) {
if (str == null || str.length() < 4 || str.length() > 12) return new ArrayList<>();
Map> memo = new HashMap<>();
return helper(str, 0, 4, memo);
} Community Discussions
Trending Discussions on ip-addresses
QUESTION
Edit: So apparently these are not really IP-addresses but rather hostnames.
I tried out the netstat to find any suspectful connections and then I found quite some remote-addresses that were really weird to me, for example the following:
ec2-3-235-82-211:httpsfra24s07-in-x0a:httpsg2a02-26f0-0300-0000-0000-0000-5c7a-f589:httpswm-in-xbd:httpsand156:https
I was wondering what any of these mean and also what the in means at 2. and 4.?
...ANSWER
Answered 2021-Jun-02 at 05:06Those are not IP addresses. They are hostnames that come from reverse DNS resolution, with most of the name cut off due to how netstat presents them. By passing --notrim you should be able to see the full hostnames. Alternatively, passing --numeric will disable hostname resolution altogether.
Taking a guess:
- 3.235.82.211, hosted on Amazon EC2. Looks like it's owned by Zoom (checked https certificate)
- fra24s07-in-x0a.1e100.net, google infrastructure of some kind (I googled the fra24s07-in-x0a string, and 1e100.net is google owned). Going to that url over https gives me a google 404 page.
- 2a02:26f0:0300::5c7a:f589, an IPv6 address, used by Akamai (a content delivery network provider), found by going there and seeing the HTTPS certificate
- Unclear. Maybe wm-in-xbd.1e100.net (another google IP); going to that url over https gives me a google 404 page.
- Unclear
QUESTION
I am new to oracle database. I work on 12c version oracle database which is hosted in linux platform. I have to whitelist a list of ip addresses to access the oracle database.
Example: Below are the server details and i need to add my ipaddress to connect to the database
...ANSWER
Answered 2021-May-19 at 10:25Looks like you're looking for ACL (Access Control List). Here's an example:
Create ACL:
QUESTION
I am trying to learn how to use sockets to send files between pcs on my local network.
I am using ubuntu on my 'server' and my original plan was to create a ufw rule that allows all LAN connections but ask for a password when accepting the socket connection. That way only devices that are really supposed to communicate with the server would be accepted.
I do realise that creating ufw rules for static IPs would be an option but unfortunately I am dealing with dynamic IPs.
I have a text file of allowed keys on my 'server' and a text file containing one authentication key on the 'client'.
The server script looks like this:
...ANSWER
Answered 2021-May-01 at 17:04While I cannot filter by IP it seems as if one must first accept the connection in order to authenticate the client. I only want devices that possess an allowed key ..
Since you want to authenticate a client based on actual data (the key or proof of possession of the key) then you must first have a connection able to transfer the data from the client. With TCP this means that you have to accept the connection.
... whether this leaves me open to any vulnerabilities.
This is the usual way to go but it leaves you open to denial of service attacks. Creating a new connection takes resources, so by opening lots of connections an attacker can exhaust server resources. If all resources are exhausted this way even valid users can no longer access the server. See for example the SYN flood attack.
Depending on the setup of the client additional protections can be added. But these are outside of the python application and mostly out of scope of this question. But to get some ideas see the section about countermeasures in the Wikipedia article.
QUESTION
I have question about ALB.
I heard that need to use NLB, if I want to use static Ip for Loadbalancer.
Because ALB not support static IP service.
So I want to know why ALB not support that
I found another stackoverflow answer.
In AWS, why is that an NLB can provide static IP addresses whereas an ALB cannot?
But I want to know more detail that why it is better not to use a static IP in the application layer.
I'm not good well English. If you don't understand my question. let me know. I will edit to my posting
thank you
...ANSWER
Answered 2021-Apr-28 at 05:32Because ALB not support static IP service.
By default it does not, but you can add Global Accelerator to ALB and get static IPs for it. From docs:
Once enabled, you are able to see the new accelerated endpoint’s details, such as the two static IP addresses and the global DNS name, right in the ALB console. Let’s take a look at how to use this feature.
QUESTION
In my current situation, we have several Azure Function apps that talk to an Azure SQL database (using Entity Framework, should it matter), using functions that trigger on an Azure ServiceBus trigger.
In the last weeks we have been improving security by using a VNET and subnets to only allow access to the Azure Database server by only the Function apps that need to use it. However, I have run into a strange issue. It seems that now the database server is set to disallow traffic apart from the defined subnets in which my fuction apps run, the function apps start giving intermittent SQLExceptions when connecting to the database with the message that some specific IP is not allowed by the database Firewall rules. The weird thing is that this error is not consistent. I would expect either for the function app to be declined at the firewall for it's IP, or be allowed all the time, but not randomly as is currently the case.
Question
Is there something that I am missing with my setup? Or, how do I force my function apps in subnets to use their internal IP that is allowed by the database server firewall rules, and not some other outbound IP address that is not in the database firewall rules? Alternatively: What can possibly explain that access to the database sometimes succeed (indicating a proper internal IP used by the funcation app), and sometimes fail on the firewall (with an unknown IP address), seemingly at random.
Hopefully somebody can help!
Detailed Description of situation
The Function App has a function that is triggered by a Service Bus trigger. The Function App is running with a P1v2 Premium service plan with Vnet integration on.
The app is running inside a Subnet in our environment with a defined IP adress range with a /26 subnet mask. If I check the environment variables of the funciton app in Kudu I can see the PRIVATE_IP_ADDRESS setting is in the subnet range. The database firewall is set up to disallow all traffic, apart from the subnet of my function app as follows:
Triggering the function app which will write some stuff into the database works sometimes (Indicating that the access to the database is working at least when the IP address of the function is the correct one) however, there are also a lot of SQLExceptions with the following error:
Cannot open server 'database-server-name' requested by the login. Client with IP address 'XXX.XXX.XXX.XXX' is not allowed to access the server. To enable access, use the Windows Azure Management Portal or run sp_set_firewall_rule on the master database to create a firewall rule for this IP address or address range. It may take up to five minutes for this change to take effect.
The IP address mentioned in the error is NOT the internal IP defined on the Vnet or subnet IP range. It is also not even one of the IP's that show up in the Possible Outbound Ip addresses of the function app,
These happen more or less randomly. Sometimes they don't appear for x triggers, sometimes it fails for hundres of calls in a row.
Enabling the Datbaase server setting "Allow Azure services and resources to access this database server" stops the error from occuring, but of course that is counter to configuring the firewall to allow certain subnets
What I have tried
- Setting the configuration settings WEBSITE_VNET_ROUTE_ALL and WEBSITE_DNS_SERVER on the function app to force traffic to use the VNET route as metioned here: Unable to connect Azure Function with Azure SQL using private endpoint
- Adding Storage as service endpoint to the subnet as mentioned here: Unable to connect to Azure Function App after integrating into VNET
- Restarting and stopping/starting the Function app
- Changing the Function app Scaling to force a change in outbound IP addresses as mentioned here: https://docs.microsoft.com/en-us/azure/azure-functions/ip-addresses#outbound-ip-address-changes
ANSWER
Answered 2021-Apr-01 at 17:09Your Azure Function will only use a private outbound IP address picked from your VNet when you have VNet integration enabled. The VNet integration option is only available in the Function Premium Plan.
Additionally, the environment variables WEBSITE_VNET_ROUTE_ALL and WEBSITE_DNS_SERVER you already mentioned should be set as well as mentioned here (assuming your SQL server is in the same VNet).
QUESTION
Can someone let me know if its possible to connect or PING a Databricks Cluster via its public ip address?
For example I have issued the command ping --all-ip-addresses and I get the ip address 10.172.226.115.
I would like to be able to PING that ip address(10.172.226.115) from my on-premise PC (or connect to the cluster with an application using the ip address?
Can someone let me know if that is possible?
...ANSWER
Answered 2021-Mar-27 at 13:40That public IP is not guaranteed to be your cluster; unless somehow you've installed Databricks into your own cloud provider account, where you fully control the network routes, it would be connecting to Databricks managed infrastructure where the public ip would likely be an API gateway or router that serves traffic for more than one account
Note: just because you can ping Google DNS with outbound traffic doesn't mean inbound traffic from the internet is even allowed through the firewall
connect to the cluster with an application
I'd suggest using other Databricks support channels (i.e their community forum) to see if that's even possible, but I thought you're just supposed to upload and run code within their ecosystem. At least, for the community plans
Specifically, they have a REST API to submit a remote job from your local system, but if you want to be able to send data back to your local machine, I think you'd have to write and download from DBFS or other cloud filesystem
QUESTION
I am trying to your the REST API to change the IP of my Ubuntu Virtual Machine on Azure.
In the web interface, stopping and starting the VM usually causes the public IP to change. However, just stopping and starting the VM with curl requests to the API does not trigger an IP change.
I can request the current status of the IP configuration using a GET request (see the docs here), but I cannot find any function to refresh it. I also tried setting the IP to static and back to dynamic before turning the VM back on, that also did not work.
I found this similar question here, but when I tried that approach, I got the following error message:
...ANSWER
Answered 2021-Mar-12 at 06:06As your mentioned: In the web interface, stopping and starting the VM usually causes the public IP to change.
Generally, the stop operation in the web UI actually does deallocate operation, so you need to use REST API Deallocate and Start to trigger the public IP address changed.
QUESTION
I have a python (flask) application running on Google App Engine (flex); the application is protected by the GAE firewall where:
- Default rule is 'Deny' all ingress
- There is a whitelist of IP addresses from which traffic is allowed.
I have some microservices deployed on Cloud Run (fully managed) which:
- Receive requests from the GAE app (e.g. for heavy duty tasks)
- Send the results of whatever they process as http requests back to handlers/endpoints in the GAE app
Thus the GAE app is the main point of interaction with clients and a dispatcher of heavy tasks, while the processing of those tasks is carried out by the microservices. I have set up a static outbound IP address of the Cloud Run hosted service which verfiedly works and traffic is routed through the NAT gateway as required in the documentation. The respective NAT IP address is on the firewall whitelist.
The problem is that the firewall still does not let in the Cloud Run >>> GAE app requests which bounce back with 403 statuses (of course, if I change the default firewall rule to 'Allow', traffic goes through). If I host the same microservice in a docker container on a GCE VM with a static IP address like this everything works flawlessly. This makes me hypothesize that albeit Cloud Run outbound traffic is indeed routed through the static IP address when traffic is towards addressees outside GCP, when I try to ping an internal (project-wise) asset it still goes though some dynamically selected IP (i.e. the static IP solution simply does not work). Unfortunately the logs don't show the 403-ed attempt so I can't see from what IP addresses those request seem to come (from a GAE standpoint).
I would be very grateful for ideas how this can be fixed as it greatly diminishes the value of the otherwise wonderful idea to have static outbound IP addresses for Cloud Run.
...ANSWER
Answered 2021-Jan-09 at 09:12You are correct saying that the static IP is not honoured when packets are routed internally to GCP.
I think this is what you want. You have to allow in the firewall one of the IPs mentioned there (not sure which one right now).
QUESTION
We want Bitbucket webhooks to trigger our CI tool which runs on an AWS EC2 instance, protected with ingress rules from general access.
Bitbucket provides a page listing their IP addresses at https://support.atlassian.com/bitbucket-cloud/docs/what-are-the-bitbucket-cloud-ip-addresses-i-should-use-to-configure-my-corporate-firewall/
They also have a machine-consumable version at https://ip-ranges.atlassian.com/ for Atlassian IPs in general.
I wonder, what is an efficient approach to add and maintain this list in AWS EC2 security groups, e.g. via terraform.
...ANSWER
Answered 2021-Jan-21 at 11:47I ended up scraping the machine-consumable json from their page, and let terraform manage the rest. The step of getting the json is left as a manual task.
QUESTION
I am writing a script and I would have the private IP address, is their way to fetch Instance Name and resource group from az cli
...ANSWER
Answered 2021-Jan-27 at 07:31To fetch Instance Name and resource group from az CLI, you can use
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Install ip-addresses
With Composer composer require mesour/ip-addresses
Or download source from GitHub
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