________________________________
From: Tom Eastep <[email protected]>
>
> Looks like you are redirecting port 80 to port 62001, but no process
> is listening on that port.


How do you know there's no process listening on that port?

I ran this on the shorewall machine:

# ss -tnap | fgrep 62001
LISTEN     0      128         :::62001                   :::*                   
users:(("/usr/sbin/apach",pid=29038,fd=12),("/usr/sbin/apach",pid=29033,fd=12),("/usr/sbin/apach",pid=29032,fd=12),("/usr/sbin/apach",pid=29031,fd=12),("/usr/sbin/apach",pid=28968,fd=12),("/usr/sbin/apach",pid=27512,fd=12),("/usr/sbin/apach",pid=27461,fd=12),("/usr/sbin/apach",pid=22872,fd=12),("/usr/sbin/apach",pid=19472,fd=12),("/usr/sbin/apach",pid=19099,fd=12),("/usr/sbin/apach",pid=19094,fd=12))
ESTAB      0      0         ::ffff:10.215.144.92:62001                
::ffff:10.215.246.167:47475               
users:(("/usr/sbin/apach",pid=29031,fd=26))
TIME-WAIT  0      0         ::ffff:10.215.144.92:62001                
::ffff:10.215.248.193:37020 
ESTAB      0      0         ::ffff:10.215.144.92:62001                
::ffff:10.215.246.167:57504               
users:(("/usr/sbin/apach",pid=27512,fd=26))
TIME-WAIT  0      0         ::ffff:10.215.144.92:62001                
::ffff:10.215.248.193:34666 

It's an apache/php process and it is serving a page as I can test by directly 
connecting a "loc" host with IP address 10.215.144.48 to Shorewall's IP address 
10.215.144.92 ($FW).

Also, the redirection was not supposed to match in my previous example because 
the destination IP of www.shorewall.net was in an ipset whitelist.
In fact, the rule is:
REDIRECT:info:OUT1      loc:$MY_NETWORKS!$OUT_VIP       62001   tcp     80      
-       !+OUT_WL,+OUT_MANUAL_WL,$MY_EXTRA_NETWORKS,$MY_WAN

# host www.shorewall.net
www.shorewall.net is an alias for shorewall.mastermindpro.com.
shorewall.mastermindpro.com has address 63.135.54.24
# ipset list OUT_WL | grep 63.135
63.135.48.0/20 timeout 0

Anyway, in order to simplify things even further, I added 10.215.144.48 to 
$OUT_VIP in order to explicitly avoid the redirection.
I then tried to access http://www.shorewall.net from 10.215.144.48 but had the 
exact same issue (BTW I can open the web page at 10.215.144.92, ie. $FW, on 
port 62001 from 10.215.144.48).

I'm attaching another dump in the hope we can shed some light on this (open 
port 80 at 63.135.54.24 from 10.215.144.48 via Squid TPROXY).

Thanks,

Vieri

PS.: nothing in Squid log.

Attachment: dump.gz
Description: application/gzip

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