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News: Problems reaching Server

Problems reaching Server
By: Jacob Sparre Andersen
May 1, 2001

Several people have in the last year reported problems with getting access to The reason for this problem appears to be that the default "time-to-live" (TTL) for TCP packets is too low. I have now recieved confirmation that this is very likely to be the case - at least for people using Windows 95, 98 or ME. On these systems the default TTL is set to 32 hops instead of 64 (as suggested in a RFC from 1992).

According to the Danish research network operators this can be fixed using a program called "regedit.exe". You should look for "DefaultTTL" under "HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VxD\MSTCP".

There should be more information at:


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