Great Circle Associates Firewalls
(October 1997)
 

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Subject: Re: udprelay using select() instead of poll()
From: Rex Espiritu <espiritu @ cgi . com>
Organization: Carnegie Group, Inc.
Date: Fri, 17 Oct 1997 18:08:41 -0400
To: "william.wells" <william . wells @ damark . com>
Cc: Mark Smith <76374 . 2304 @ compuserve . com>
References: <9709101302 . AA22523 @ damark . com>

I'm also attempting to compile udprelay under Gauntlet 3 on BSD
and am getting "udprelay.c:72: poll.h: No such file or directory".
Please contact me if you've already got this working or know how to,
e.g.:
	http://www.socks.nec.com/socksmail/msg00130.html

Any information/assistance on this would be much appreciated.
Thanks in advance.

--
M. Rex Espiritu, Jr.
MailTo:espiritu @
 cgi .
 com

william.wells wrote:
> 
> Out of curiosity
> 
> Has anyone implemented udprelay under Gauntlet 3 on BSD?
> If so, can you contact me?
> 
> Does 'udprelay' do the necessary address translation?
> 
> William .
 Wells @
 damark .
 com
> Manager, System Administration
>  ----------
> >From: Mark Smith
> To: firewalls @
 GreatCircle .
 COM
> Subject: udprelay questions.
> Date: Tuesday, September 09, 1997 14:33PM
> 
> We've been exploring the use of udprelay and I'd like to find out if
> someone is clear on what I've missed which might encourage it to
> function.
> 
> As I understand it, you install udprelay on the bastion host and then
> aim your UDP traffic at the bastion.   udprelay then forwards it based
> on the rules in the configuration file.   So far, so good.
> Unfortunately, when we try running it on a test firewall box  we get
> back ICMP 3/3 (destination unreachable / port unreachable ).   The trace
> appears to show that the packet reaches the firewall just prior to the
> ICMP message, and that udprelay doesn't appear to try to send it on.
> The firewall in question (NetSP) does not do packet forwarding by
> default.   Vendor info to the effect of "if only you used OUR
> firewall..." doesn't help me -- we're not in the market -- so please
> don't "help" that way.
> 
> If anyone can provide some info on this, please let me know.  At present
> the alternate solution is the NT SOCKS 5 code.
Title: udprelay using select() instead of poll()

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udprelay using select() instead of poll()



Hello,

I was hoping to use udprelay on a DECstation running Ultrix 4.3 or 4.4.
However, it uses the poll() system call and Ultrix only supplies select().
I looked at the FAQ and this issue was not addressed.

I'll look into making the changes myself, but thought I could save reinventing
the wheel if someone had already done this and had diffs that they could 
share.

Thanks in advance,

Sean 
---------
Sean Emery					sbemery @
 switch .
 com
Manager, System Development Environment		(412)369-2267
Union Switch and Signal Inc.
Pittsburgh, PA  15237

"When Hiro learned how to do this, way back fifteen years ago, a hacker could
 sit down and write an entire piece of software by himself.  Now, that's no
 longer possible.  Software comes out of factories, and hackers are, to a 
 greater or lesser extent, assembly-line workers.  Worse yet, they may become
 managers who never write any code themselves."  
						- Hiro Protagonist, "Snow Crash"



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