how can I troubleshoot meteor just hanging? - meteor

Hi I am trying out meteor for first time today.
my symptoms: meteor just hangs when trying to connect to port 3000 (it is listening, checked with lsof and looking at ps) a mongo instance is started on port 3002 but i can not connect to it with mongo (so perhaps neither can node ?)
background: I do already have mongo 2.0.3 installed and running (can it be a conflict?)
What can I do to troubleshoot and get meteor started ?

Site was bugging me to accept an answer or start a bounty...So here is explanation of my comment:
localhost on my machine resolves to ipv6 address first and meteor
binds only to 127.0.0.1.
So to answer the specific question of "how to troubleshoot":
I used lsof -i to verify that the meteor mongo instance was actually listening. This showed me that is was listening on 127.0.0.1. This eliminated the concept of mongo not listening. next i did host my machine's name and noticed the ipv6 came back first. this sparked a hunch and led me to force meteor to connect to 127.0.0.1 instead of localhost and it worked.

Well, check that port 3000 is open netstat -a
try a telnet localhost 3000
Use firefox extension TamperData or any other flow analysis tools to see what's going on at the HTTP level http://tamperdata.mozdev.org/
Have you tried to run against the bundled node and mongodb ?

Related

HTTP fails on Inetsim

I'm trying to set up a malware analysis lab, following the instructions found here:
https://blog.christophetd.fr/malware-analysis-lab-with-virtualbox-inetsim-and-burp/
In setting up inetsim to simulate internet protocols, I keep getting "http_tcp_80 - failed!" everytime I run it. Changing the port it uses in the configuration file to 8080 causes the it to work. When I run it on a different vm, the configuration works as intended.
I have apache also installed on this vm. Could it be interfering?
Edit: I just installed a new vm to try using inetsim without apache installed. HTTP is reported to be running, but now dns_53_tcp_udp is reported to be failing to start. Trying to browse web pages to bring up inetsim's default page fails, regardless of if I use the FQDN or the IP address. The only time I get the page is with localhost. Otherwise, I get server not found. At least I know its not apache.
The error I get with DNS indicates that the 0.0.0.0 ip is already in use, which doesn't make sense to me since 0.0.0.0 is being used to bind the services to all IPs. Changing the inetsim.conf file so "service_bind_address 10.0.0.0" instead of "service_bind_address 0.0.0.0" seems to run dns, but the browser on both the analysis machine and the victim machine still report no server found.
You should stop the Apache server:
service apache2 stop
It works for me.
I guess there are some other processes listening on those ports.
Use
sudo netstat -tulpn | grep LISTEN
It will print out those processes with their pid. For example, 964 is the pid of the first process in this case:
Check if something is occupying your corresponding ports. Shut them down with
sudo kill -9 <pid>
Of course, the busy processes running on those ports may not in listening states but still be able to cause such a problem. So you can check it with
sudo netstat -tulpn
just in case.
Anyway, it does work for me.

unable to ping/send http requests to RHEL tomcat server on Azure

Note - I am fully aware that there are lot of similar issues posted before, but I tried NSG settings, psping but nothing seem to work
All, I brought up a RHEL7.3 server on Azure and installed JDK1.8 and Tomcat8. After starting Tomcat, I tried an http request from my browser:
http://XX.yy.zz.abc:8080/ but I was unable to get the index page
I also created an inbound security rule to allow HTTP and also allow IP range from our company.
Even worse is, when I tried pinging to this IP from my desktop computer, I am unable to ping the same - it is timing out.
Please note that in the past, I've been able to bring up servers and be able to connect from desktops without any issues - in a similar azure-companynetwork setup.
Am I missing anything here?
Ok, so pings do not work, you shouldn't even try that. What you should check is the firewall on you RHEL VM and check you've allowed port 8080 on you NSG, also your VM should have a PublicIP attached
According to your description, you had better check as the following ways:
1.Please ensure you could access your web by using 127.0.0.1:8080 on your VM.
2.Check your service listening.
netstat -ant|grep 8080
Please ensure 8080 is listening on tcp not tcp6.
3.Open firewall port on RHEL.
sudo firewall-cmd --zone=public --add-port=8080/tcp --permanent
More information about RHEL firewall please refer to this link.
4.Open port on Azure NSG.
NSG could be associated with NIC and subnet, you should check all of them.
All,
It looks like there is an input firewall inside of RHEL7.3 that is preventing connections. I just stopped it using
service firewalld stop
I am able to get the home page.

How do I use livereload.js when my server is hosted?

I setup my development environment on a cloud server (why not, it's lovely!).
Specifically I am running my dev environment in google cloud with docker, forking the meanjs/mean GitHub and corresponding Dockerhub entry as a starting point.
I have mapped the port 3000 from my container where my server is running to port 80 on my cloud server where docker-engine is running. I also mapped the 35729 port to 35729 in same fashion.
See output of $ sudo docker ps (can't seem to put that table of long lines in a snippet, sorry I put it in a screenshot instead):
output of $ sudo docker ps
Now when I go to my website I gets stuck forever on liverload.js (seeing it in the browser console "Network" tab).
livereload hanging forever
Please help 'cause this is driving me nuts!
Closely related to this question, but I want to use livereload not disable it: how to stop using livereload.js in my MEAN app
It looks like port 35729 isn't open.
$ nmap -p 35729 23.251.146.156
Starting Nmap 7.12 ( https://nmap.org ) at 2016-07-08 09:34 EDT
Nmap scan report for 156.146.251.23.bc.googleusercontent.com (23.251.146.156)
Host is up (0.0043s latency).
PORT STATE SERVICE
35729/tcp filtered unknown
Are you sure that you've allowed port 35729 traffic? There could be something like iptables or some Google Cloud configuration that needs to be done to allow the traffic through.
It looks like this answer gives a good step-by-step on opening a port in Google Cloud. I can't verify, since I don't use Google Cloud.

How to get past the MongoDB port error to launch the examples?

I'm getting started with Meteor, using the examples:
https://www.meteor.com/examples/parties
If I deploy and load the deployment url ( http://radically-finished-parties-app.meteor.com/ ) , the app runs ... nothing magic there... it was an easy example
My issue occurs when I want to run it locally, I get the following message
"You are trying to access MongoDB on the native driver port. For http diagnostic access, add 1000 to the port number"
I got meteor running through the terminal command:
meteor --port 3004
Setup:
- Mac OS 10.9
- Chrome 31
This is happening because you are accessing the mongodb port in your web browser.
When you run a meteor app, e.g on port 3004
Port 3004 would be a web proxy to port 3005
Port 3005 would be the meteor app in a 'raw' sort of sense (without the websockets part.. i think)
Port 3006 would be the mongodb (which you are accessing).
Try using a different port. Or use a simpler port e.g just run meteor and access port 3000 in your web browser.
If the reason you moved the port number up because it said the port is in use the meteor app may not have exited properly on your computer. Restart your machine or have a look at activity monitor to kill the rogue node process.
I think what might have happened is you ran in on 3000, then moved the ports up and the previous one may have not been exited correctly so what you're seeing is a mongodb instance of a previous meteor instance.
This happens when you run another meteor on port 2999, forget about it and try to start a second instance on the usual port.
Try making sure Meteor is using the local embedded mongo db, which it will manage on its own:
export MONGO_URL=''
Something changed in my bash settings that I didn't copy over to zsh. I uninstalled zsh and meteor can now find and access mongo.

How to run meteor server on a different ip address?

How can i start meteor server on a different IP address? Currently in the examples am only able to run on a localhost:3000 address.
export BIND_IP no longer works, bind IP is defined with --port (or -p or --app-port) option(s):
$ meteor run --port 127.0.0.1:3000
Reference: https://github.com/meteor/meteor/commit/9b8bd31a7b6c857e5d8fc0393982e6e6b2973eb0
If you are looking to run something on another IP address (but still have the files local) you need to look into editing your vhosts file. If you are on a mac, look into Virtual Host X
The proper way to change ports with meteor is this:
meteorapp : meteor --port 5000
According to this change, you should be able to configure your app to bind to a specific IP address by configuring a BIND_IP environment variable.
export BIND_IP=127.0.0.1
You may need to update your app to a newer version of Meteor for this to work correctly.
Using Meteor 1.3.2.4, If your IP is 192.168.0.13 as in my case, on the terminal, type:
meteor --mobile-server 192.168.0.13
or
meteor --port 192.168.0.13:3000
And you will see the Meteor welcome page by typing
http://192.168.0.13:3000
on your browser.
At the moment, you can't - meteor binds to all IP addresses, but there's an issue open to add support for binding to a specific IP.
Deploy it on another server and connect to the internet-ip of the server from outside of the internal net, or connect to the local-ip of the server from the lan.
How to deploy on another server?
'meteor bundle'
and read the README
This isn't possible yet, but there is an open pull request for it. They are waiting for the author to sign the meteor contributor agreement before it can be accepted.
https://github.com/meteor/meteor/pull/469/
If you need it before it's official you can apply the patch yourself (or potentially just replace 127.0.0.1 with the IP address you want to bind to in the same files references by the patch (app/lib/mongo_runner.js and app/meteor/run.js).
Actually, Meteor behaves differently in production and development environments.
Production
Use environment variable BIND_IP
Development
Use --port argument like meteor run --port 192.168.1.1:port
Docs here
According to netstat -tapn Meteor/Node.js listens on all available IP addresses on the machine:
tcp 0 0 0.0.0.0:3000 0.0.0.0:* LISTEN 9098/node
Do you have something like iptables running?

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