[UE] cgi-bin not working over ipv6

Hi,

I run a lighttpd server in a docker container with ipv6 enabled.
I am able to access the html part of the website using either the ipv6 or the ipv4 address of the container.
The cgi-bin part works OK when i use the ipv4 address but gives a 500 error when using the ipv6 address.

Can anyone confirm that cgi-bin (running a bash script ) does or does not work when you use the ipv6 address of a server?

I am using lighttpd/1.4.45

When using ipv4 i get:

wget --quiet -O -  "http://172.17.0.2/cgi-bin/index.cgi?hello_world" 
172.17.0.1
hello_world

and with using ipv6 i get:

wget  -O -  "http://[2a01:7e01:e002:9420:8888:242:ac11:2]/cgi-bin/index.cgi?hello_world" 
--2019-09-23 17:24:07--  http://[2a01:7e01:e002:9420:8888:242:ac11:2]/cgi-bin/index.cgi?hello_world
Connecting to [2a01:7e01:e002:9420:8888:242:ac11:2]:80... connected.
HTTP request sent, awaiting response... 500 Internal Server Error
2019-09-23 17:24:07 ERROR 500: Internal Server Error.

The html part works fine, so lightp is listening on ipv6.

using ipv4 for html i get:

 wget --quiet  -O -  "http://172.17.0.2/index.html" 
<!DOCTYPE html>
<html>
 <head>
  <META HTTP-EQUIV="Expires" content="Tue, 03 Jul 2001 06:00:00 GMT">
  <META HTTP-EQUIV="Last-Modified" content="{now} GMT">
  <META HTTP-EQUIV="cache-control" content="no-store, no-cache, must-revalidate, post-check=0, pre-check=0, max-age=1">
  <META HTTP-EQUIV="pragma" content="no-cache">
 </head>
 <body style="height: 100%;">
  <style type='text/css'>
  "Nothing to seen here folks, move along..." 
 </body>
</html>

And using ipv6 i get:

wget --quiet  -O -  "http://[2a01:7e01:e002:9420:8888:242:ac11:2]/index.html" 
<!DOCTYPE html>
<html>
 <head>
  <META HTTP-EQUIV="Expires" content="Tue, 03 Jul 2001 06:00:00 GMT">
  <META HTTP-EQUIV="Last-Modified" content="{now} GMT">
  <META HTTP-EQUIV="cache-control" content="no-store, no-cache, must-revalidate, post-check=0, pre-check=0, max-age=1">
  <META HTTP-EQUIV="pragma" content="no-cache">
 </head>
 <body style="height: 100%;">
  <style type='text/css'>
  "Nothing to seen here folks, move along..." 
 </body>
</html>

cgi-bin/index.cgi is:

#!/bin/bash

echo "${REMOTE_ADDR}" 
echo "${QUERY_STRING}"

Kind regards,
Ed

Replies (2)

RE: cgi-bin not working over ipv6 - Added by stbuehler over 4 years ago

Your wget examples are useless as you request a different URL (.html instead of .cgi).

Your script should respond with a proper CGI response, i.e. first a header block, then a body. If the first line doesn't look like a header (doesn't contain a ":"), lighttpd will assume an empty one with status 200, otherwise it will try to parse the header. IPv4 doesn't contain a ":", but IPv6 does - but an IPv6 address isn't a valid header.

Try starting output with printf 'Status: 200\r\nContent-Type: text/plain\r\n\r\n' or something like that.

[SOLVED] RE: cgi-bin not working over ipv6 - Added by kapiteined over 4 years ago

Thanks so much!

Indeed the way too simple index.cgi was the culprit.

Adding a proper response fixed my problem.

Thanks again!

Kind regards,
Ed

(1-2/2)

Project

General

Profile

Lighttpd