#500 Firewall Error ##
Occasionally I have received the following error when trying to send emails to other organisation from Exchange 2007:
Diagnostic information for administrators:
Generating server: exchange-server.internal.domain.com
enduser@externaldomain.com
external.mail.server.domain.com #500 Firewall Error ##
It turns out that this is actually due to the Cisco router inspecting SMTP traffic. Entering the command below into IOS fixed the issue:
no ip inspect name SDM_LOW esmtp
Telephones and 24 (the TV series)
Having watched 24 (the TV series), I have always wanted a Cisco phone that would ring with the same ringtone as used by CTU. To get the ringtone onto the phones I needed to enable the TFTP server on the router and edit the ringlist.xml file as so:
<CiscoIPPhoneRingList>
<Ring>
<DisplayName>CTU 24</DisplayName>
<FileName>ctu.raw</FileName>
</Ring>
</CiscoIPPhoneRingList>
Having tried to follow the Cisco guidelines to create the ringtone myself (unsuccessfully – it kept skipping and not repeating itself correctly), I stumbled upon a site that allowed me to download a ringtone that worked. That ringtone can be found here: ctu.raw. If you copy the ringtone onto your router and reset the phones then you should be in business.
Below are some images of my Cisco 7912G phone hooked up to Unified CallManager Express runningon my Cisco 2801 router.
Logged on to Cisco Unified CallManager Express, power suppiled via PoE.
Selection of the CTU 24 ringtone from the settings menu.
My Server Room
Below are some images of my server room. It's located as far away from earshot as possible which isn't easy considering it's in a small flat!
Well, here's my server cabinet. You can see I've still got 6U free, so that should leave space for UPS, NAS, and a few more servers!
Here's an up close image of my Cisco 2801 router and my Linksys SWR2024W switch. You can also see a bit of my 48-port patch panel.
Here is my messy wiring. About 40 of the ports are patched to outlets but you can see I currently have hardly any of them connected. I'm waiting on patch cables as I have a very low success rate when crimping my own.