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Cannot make call out and then in through iptables using React app on server

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0

I have a React web app (static hosted) on Apache HTTPS at https://virtualyou.io. Within the web app, I make a call for an email contact form to http://virtualyou.io:3001/api/form to send an email. This works from the React app on my laptop. I'm quite sure it's my iptables but since Outbound is open and inbound supports 3001, I'm not sure why it works from outside the server running the React app. And, it also works from Postman to http://virtualyou.io:3001/api/form. But, from inside it does not.

Here's my iptables -L

Chain INPUT (policy DROP)

target     prot opt source               destination

ACCEPT     all  --  anywhere             anywhere             state RELATED,ESTABLISHED

ACCEPT     all  --  anywhere             anywhere

ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:ssh

ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:http

ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:https

ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:3001



Chain FORWARD (policy ACCEPT)

target     prot opt source               destination



Chain OUTPUT (policy ACCEPT)

target     prot opt source               destination

ACCEPT     all  --  anywhere             anywhere

Can someone please help me understand why from the web app at https://virtualyou.io/contact ... the internal api call to the node application at port 3001 does not work?

Thanks in advance,

David

iptables virtualhost apache2

share

edited 5 mins ago

David Whitehurst

asked 6 mins ago

David WhitehurstDavid Whitehurst

11

New contributor

David Whitehurst is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What is the problem you are having?
  
  – Michael Hampton♦
  5 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  this url server-dns:3001/api/form will accept a POST from Postman and send me an email from Amazon SES. I make the same exact URL POST from within a web application running on server-dns/contact (with an HTML form for POST). It does not send an email. Also, if I run the same web app from my laptop (not the server) it also accepts the URL POST and sends me an email. I think it's iptables related.
  
  – David Whitehurst
  1 min ago
  

  
  
  
  

add a comment | 

0

I have a React web app (static hosted) on Apache HTTPS at https://virtualyou.io. Within the web app, I make a call for an email contact form to http://virtualyou.io:3001/api/form to send an email. This works from the React app on my laptop. I'm quite sure it's my iptables but since Outbound is open and inbound supports 3001, I'm not sure why it works from outside the server running the React app. And, it also works from Postman to http://virtualyou.io:3001/api/form. But, from inside it does not.

Here's my iptables -L

Chain INPUT (policy DROP)

target     prot opt source               destination

ACCEPT     all  --  anywhere             anywhere             state RELATED,ESTABLISHED

ACCEPT     all  --  anywhere             anywhere

ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:ssh

ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:http

ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:https

ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:3001



Chain FORWARD (policy ACCEPT)

target     prot opt source               destination



Chain OUTPUT (policy ACCEPT)

target     prot opt source               destination

ACCEPT     all  --  anywhere             anywhere

Can someone please help me understand why from the web app at https://virtualyou.io/contact ... the internal api call to the node application at port 3001 does not work?

Thanks in advance,

David

iptables virtualhost apache2

share

edited 5 mins ago

David Whitehurst

asked 6 mins ago

David WhitehurstDavid Whitehurst

11

New contributor

David Whitehurst is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What is the problem you are having?
  
  – Michael Hampton♦
  5 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  this url server-dns:3001/api/form will accept a POST from Postman and send me an email from Amazon SES. I make the same exact URL POST from within a web application running on server-dns/contact (with an HTML form for POST). It does not send an email. Also, if I run the same web app from my laptop (not the server) it also accepts the URL POST and sends me an email. I think it's iptables related.
  
  – David Whitehurst
  1 min ago
  

  
  
  
  

add a comment | 

I have a React web app (static hosted) on Apache HTTPS at https://virtualyou.io. Within the web app, I make a call for an email contact form to http://virtualyou.io:3001/api/form to send an email. This works from the React app on my laptop. I'm quite sure it's my iptables but since Outbound is open and inbound supports 3001, I'm not sure why it works from outside the server running the React app. And, it also works from Postman to http://virtualyou.io:3001/api/form. But, from inside it does not.

Here's my iptables -L

Chain INPUT (policy DROP)

target     prot opt source               destination

ACCEPT     all  --  anywhere             anywhere             state RELATED,ESTABLISHED

ACCEPT     all  --  anywhere             anywhere

ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:ssh

ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:http

ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:https

ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:3001



Chain FORWARD (policy ACCEPT)

target     prot opt source               destination



Chain OUTPUT (policy ACCEPT)

target     prot opt source               destination

ACCEPT     all  --  anywhere             anywhere

Can someone please help me understand why from the web app at https://virtualyou.io/contact ... the internal api call to the node application at port 3001 does not work?

Thanks in advance,

David

iptables virtualhost apache2

share

edited 5 mins ago

David Whitehurst

asked 6 mins ago

David WhitehurstDavid Whitehurst

11

New contributor

David Whitehurst is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

Chain INPUT (policy DROP)

target     prot opt source               destination

ACCEPT     all  --  anywhere             anywhere             state RELATED,ESTABLISHED

ACCEPT     all  --  anywhere             anywhere

ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:ssh

ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:http

ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:https

ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:3001



Chain FORWARD (policy ACCEPT)

target     prot opt source               destination



Chain OUTPUT (policy ACCEPT)

target     prot opt source               destination

ACCEPT     all  --  anywhere             anywhere

share

edited 5 mins ago

David Whitehurst

asked 6 mins ago

David WhitehurstDavid Whitehurst

11

New contributor

David Whitehurst is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share

edited 5 mins ago

David Whitehurst

asked 6 mins ago

David WhitehurstDavid Whitehurst

11

New contributor

David Whitehurst is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 6 mins ago

David WhitehurstDavid Whitehurst

11

New contributor

David Whitehurst is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 6 mins ago

David WhitehurstDavid Whitehurst

11