Tag Archives: network

[SOLVED] VPN connectioin error: short read (-1): Message too long

If you encounter the following error during VPN connection: pptp[12549]: nm-pptp-service-12543 warn[decaps_gre:pptp_gre.c:331]: short read (-1): Message too long there's an easy fix. You have to lower your MTU (automatically obtained value was invalid). First, you have to locate your VPN … Continue reading

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Automated RTP headers analysis

IPTV technology delivers video streams using fast, but not reliable protocols (UDP). Those connection-less protocols do not guarantee delivery nor retransmissions of missing packets. We have to accept low video quality for some networks or add another layer above basic … Continue reading

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Wavemon – monitor your WIFI connection quality

The old truth that everyone who spends days on business trips: hotels generally suck at local Internet delivery service. The least important service in hotel is pretty crucial if you depend on it to finish some work after business hours. … Continue reading

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Check current network bandwidth used on a Linux/Unix box

Sometimes you need to quickly measure current bandwidth used by your Linux box and don't have dedicated command installed. You can use standard /proc/ file entries to get that info from the system. Example of a embedded device with a … Continue reading

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Server flood automatic detection

My current customer develops embedded devices used by many end users. In order to save server load devices use multicasts for downloading data: every device registers itself on multicast channel using IGMP and listens to UDP packets. No connections to … Continue reading

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