Two possible scenarios:

• You are using VPN, but some of your applications time out (MTU is too big)
• Your OS is preconfigured for VPN by your employer, but the transfer rate can be better (MTU is too small)

In both cases the MTU needs to be adjusted:

1. Start regedit
2. Check all interfaces under HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces and find the one with the IP corresponding to the problem interface (e.g. the VPN tunnel interface). For example:
   IPAddress REG_MULTI_SZ 192.168.12.1
   MTU REG_DWORD 0x000005DC (1500)

   As you can see the MTU is set to 1500 what is too high for a VPN tunnel

3. Double click on MTU
4. Click on Decimal
5. Enter 1400 (or 1300 to be on the safe side, or 1500 if you are not using VPN)
6. Click OK
7. Reconnect (if you are connected to the VPN)

Also see:

Windows 2000/XP Registry Tweaks
How to change the PPPoE MTU size in Windows XP
Change the Maximum Transmission Unit (MTU) Size (Windows NT/2000/XP)

Sometimes you need to integrate web-pages with corresponding forum threads. Here's one of the way to do it.

Heian Godan by Hirokazu Kanazawa and Luca Valdesi
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Today I had to search through dozens of mail logs (syslog) located on several mail relays and find all entries related to a particular user.

Given:

• All servers are managed via a remote tty console,
• The ksh-script must be copy&pasteable
• All logs are gzipped
• I need all entries with the same message number (the ninth field) as the found log entry

This is what I came up with:

[read more...]

Wine 1.1.5 is out. So are new compiling errors:

The thing is, wine/debug.h must be included before any other win*.h headers in dlls/cryptnet/cryptnet_main.c

One of the methods to break out of frames:

• Squish DNS (A, SOA, CNAME, NS, PTR, AAAA. ANY) tester
• DNS-OARC Web-based DNS randomness test
• Robtex RBL Realtime Block List, Domain Name Server records, IP Reverse DNS, C-Network, Domain
• Whois, Route, AS Analysis, DNS graphs
• DNSstuff IP, whois, country IP, traceroute, VectorTrace, DNS traversal, Speed tests, HTML validator
• What's my IP IP, DNS, whois, traceroute testers, port scanner
• w3dt DNS lookup, DNS traversal, PortScan, trace route, RBL check, MTU route, NTP test, remote process list
• Into DNS

If you are getting no response from a device connected to a Cyclades port you can try to reset all ports by sending HUP signal to cy_ras process:

Some CPU's and system boards allow you to change operating voltage and frequency, resulting in a corresponding change in performance, and power consumed.

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"Easy for bots, difficult for humans". Not that it was the idea behind Completely Automated Public Turing tests to tell Computers and Humans Apart. The proper test should:

1. work properly out of the box
2. work regardless of language settings
3. be solvable for almost all humans
4. and few Bots

But what about the implementations? Read about CAPTCHA's here.