Amanda-Users

Re: Still get ERROR [host fw.my.co.uk: port 62679 not secure] after I added my ipchain rule:

2006-02-17 07:32:46
Subject: Re: Still get ERROR [host fw.my.co.uk: port 62679 not secure] after I added my ipchain rule:
From: Paul Bijnens <paul.bijnens AT xplanation DOT com>
To: chuck AT smtl.co DOT uk
Date: Fri, 17 Feb 2006 13:26:21 +0100
On 2006-02-17 13:23, Chuck Amadi Systems Administrator wrote:

As you stated it's still forking to the firewall ipnumber and not the
tape server.

("...forking..." ???    I'm afraid I don't understand that word in
this context...)

Yes, as expected, the client sees the request coming from the NAT-firewall itself, but is that a problem?





Cheers for your help





On Thu, 2006-02-16 at 17:52 +0100, Paul Bijnens wrote:
On 02/16/2006 05:02 PM, Chuck Amadi Systems Administrator wrote:
Hi List sorry for the continuous cries for help.

Regarding Amanda and ipchains rules it didn't work Amanda client on server was 
still
forking to secure ports that weren't  in my udp range. I run tcpdump
port 10080 on server.
ERROR [host firewall.my.co.uk: port 64524 not secure]
So the firewall does NAT (that is why, from the client's point of view,
the ipnumber is the firewall itself, and not the amanda server, and the
portnumber is >60000).

So, as already said, you should patch the client amanda software only
for that host (i.e. no need to install that version on any other machine
or amanda server), to disable the check for a udp source port < 1024:

For amanda 2.4.5p1, edit the file  common-src/security.c:

You find this section:

  229
  230     /* next, make sure the remote port is a "reserved" one */
  231
  232     if(ntohs(addr->sin_port) >= IPPORT_RESERVED) {
233 ap_snprintf(number, sizeof(number), "%d", ntohs(addr->sin_port));
  234         *errstr = vstralloc("[",
  235                             "host ", remotehost, ": ",
  236                             "port ", number, " not secure",
  237                             "]", NULL);
  238         amfree(remotehost);
  239         return 0;
  240     }

and make test test succeed always, by changing line 232:

  232     if(1 || ntohs(addr->sin_port) >= IPPORT_RESERVED) {


i.e. add the "1 ||" string to the if statement.




--
Paul Bijnens, xplanation Technology Services        Tel  +32 16 397.511
Technologielaan 21 bus 2, B-3001 Leuven, BELGIUM    Fax  +32 16 397.512
http://www.xplanation.com/          email:  Paul.Bijnens AT xplanation DOT com
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