About dtbullock

dtbullock · 06-12-2015

Every time I reboot my Cisco IOS 800-series router, all the Windows 7 machines 'identify' the wireless network as being a 'new' network, forcing users to classify it as Home/Work/Public all over again (and more painfully, causing host firewalls to th...

dtbullock · 10-21-2012

My client would like callers who have dialled an extension and been put through to voice-mail to be able to return to the site's operator instead of leaving a message.I thought to callf-forward callers to an AA script instead of to the 'voicemail' ap...

dtbullock · 06-27-2012

So we have 3 routers as such:R1 and / 10.9.8.0 /22R1 --------------- R2 ---------------- R3 -- 10.9.12.0 /22 ? \ 10.9.16.0 /22 In R...

dtbullock · 06-27-2012

I've frequently seen recommendations to have a separate "management VLAN". I guess the main ideas are:a) to keep managment-traffic and data-traffic out of the same Layer 2 broadcast domain? (So that rogue stations in the access-layer can't sniff ma...

dtbullock · 06-27-2012

Is minimising one's use of the private address space to avoid unnecesary potential overlap worth the hassle of having un-even VLSM lengths?I am designing my first non-trivial IPv4 addressing scheme in the 10.0.0.0/8 range. Just two small branch offi...

dtbullock · 06-12-2015

So far I have found http://blogs.technet.com/b/networking/archive/2010/09/08/network-location-awareness-nla-and-how-it-relates-to-windows-firewall-profiles.aspx and this has clarified the question a little: it seems that Network Location Awareness (N...

dtbullock · 09-26-2012

Hi Steffen,I was going to call it a bug on 9.2.1 and get on with my life. But if it's happening with later versions of everything for you, then I'll try to collect a few of my thoughts on it. Maybe you will be motivated enough to chase it up.First,...

dtbullock · 07-23-2012

I chose Alessio's as the 'correct' answer, since it mentioned route summarisation. But both answers were correct in the sense that they were quite reasonable.In the end, I decided to go wtih my varying-length VLSM approach, to keep the address-spraw...

dtbullock · 06-28-2012

I have found a problem with option B1. If I'm on R3 and try to ping R1, R1 has no route back to me, since by default the 'ping' command will use the interface nearest to the destination, and will thus us its IP address in the /30 address as the src ...

dtbullock · 06-27-2012

Hi Joseph, that's a useful example, thanks. In particular, the setting of the source-interface for the SSH server, etc, was something I hadn't picked up on before. Also how the switch defends itself with the 'IPV4-MANAGEMENT-ACCESS' ACL - solves an...

Member Since	‎02-18-2008 10:44 PM
Date Last Visited	‎08-18-2017 03:55 AM
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Why does windows insist that the wireless network is 'new' after the router reboots?

Is there a better xfermailbox.aef?

If I want to summarise routes, I don't want the router I'm advertising to to be connected to the subnet, right?

What is gained from a management VLAN?

IPv4 private addressing tradeoff: small footprint vs even VLSM length?

So far I have found http:/

6945 won't register to CME 9.0 (SCCP)

IPv4 private addressing tradeoff: small footprint vs even VLSM l

Re: If I want to summarise routes, I don't want the router I'm a

What is gained from a management VLAN?