[Shorewall-users] ProxyArp Implementation check

Ama Kalu ama.kalu at cwlgroup.net
Thu Dec 4 17:18:34 PST 2003


Hi,

I know 127.0.0.1 is local host.

But why would the mail server would will deny itself smtp service?

Ama

>-----Original Message-----
>From: shorewall-users-bounces at lists.shorewall.net
[mailto:shorewall-users-
>bounces at lists.shorewall.net] On Behalf Of Troy Arnold
>Sent: Thursday, December 04, 2003 3:39 PM
>To: 'Mailing List for Experienced Shorewall Users'
>Subject: RE: [Shorewall-users] ProxyArp Implementation check
>
>127.0.0.1 is your localhost...
>
>-----Original Message-----
>From: Ama Kalu [mailto:ama.kalu at cwlgroup.net]
>Sent: Thursday, December 04, 2003 8:29 AM
>To: shorewall-users at lists.shorewall.net
>Subject: [Shorewall-users] ProxyArp Implementation check
>
>Dear All,
>
>I have just implemented ProxyARP with my Mail server behind shorewall.
>
>It appears to be working OK as I can both send and receive mails, and
>this server is available to both the NET and my LAN using the same
>public IP.
>
>The only port open to the net from shorewall is https (443)
>
>I have attempted to reach both the Mailserver and the firewall with
nmap
>and failed.
>
>But I have been seeing this in my Mail server logs for the past 24
hours
>since I did this ProxyARP thing.
>
>"Connection attempt to service SMTP from IP address 127.0.0.1
rejected."
>
>My question is this;
>
>Is someone attempting some form of exploit via https on my mail server?
>How did this person go past shorewall? Has anyone any idea what is
going
>on?
>
>Are there other ways of testing that ProxyARP and shorewall are working
>as designed?
>
>Thanks for your assistance.
>
>Ama
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