Astiostech – Blog, News and Updates
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TMNet’s Streamyx, as part of their antiflooding attempts of their service implements the blocking of port 25 which is commonly used for sending emails using SMTP for. As a streamyx user (non corporate/non fixed IP user), you may find this a nuisance especially if you … “Sending emails with streamyx (port 25 blocked by Streamyx)”
Read MoreLets face it, you can have a 100Mbps link to the WWW but it makes a huge performance (speed) impact if you have crappy DNS servers. This could mean DNS servers that are easily poisoned, DNS servers that are slow and DNS servers that are … “Free Internet Filter (and open & fast dns server)”
Read MoreI just got meself a samsung i780, pretty nifty runs on Windows Mobile 6. I installed Activesync as usual to get things sorted out between the phone and the computer. I got pretty frustrated once i was unable to unload this darn thing (activesycn) off … “My Samsung & How To Disable ActiveSync From Buggin’ You”
Read MoreLong awaited SP1 for users of Vista is around the corner. I just got a glimpse of the beta site MS has setup to enable dev folks and private beta testers to roll out. So what’s the deal all about. Well, it’s simple enhancements from … “Windows Vista Service Pack 1 – The Real Deal”
Read MoreHad a client that was subjected to an open relay attack. In mere hours their Exchange 2007 was filled with not less than 100,000 outbound emails, indicating this server is a possible open relay. I though, i should try out the GUI to start cleaning … “Delete ALL SMTP Queues In Exchange 2007 (Quick and Dirty)”
Read MoreThere are two rated high vulnerabilities exist in Microsoft software that’s publicly disclosed and have the patches released! One of them affecting Windows OS is explained in http://www.microsoft.com/technet/security/bulletin/ms07-051.mspx for MS Agent vulnerability which pretty much affects those using Windows 2000 with SP4 (most likely a … “MSN and MS-Agent exploits”
Read MoreWhen you directly open up attachments in Outlook, they launch the application that corresponds to that attachment, e.g. a .xls file will launch Microsoft Excel. So when you start working on this file, remember to save it somewhere else (save as) to where all your … “Outlook Tip: Retrieving “lost” attachments”
Read MoreMany a times you might cross organizations that implement internal DNS for name resolution. This is especially true for those running Microsoft Active Directory, where DNS plays an integral part in it’s directory services lookup. Problems can happen when especially the domain names for both … “Split-brain DNS”
Read MoreA customer from Cambodia (shout out to Whaddanak of CBL) once asked ways in which one can publish a front end Exchange server securely in a DMZ (DeMilitarized Zone). The obvious answer is DEFINITELY YES. Since Exchange 5.5, OWA could easily be isolated from the … “ISA Server 2006 VS Exchange Outlook Web Access”
Read MoreA shout out to my friend Velan Ramalinggam, thanks for your help today 🙂 We just got back from a customer’s site and they had a complain that after enabling ISA server proxy forwarding option through routing, the ISA server became a crawl. Although direct, … “DNS and ISA Server”
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