SSH & OpenVPN perform poorly

Keywords: dscp, iptables, ssh, openvpn, network
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Special services like ssh and openvpn appear to be really slow while everything else works ok.

Above software does not set a DSCP value. This might be problematic in networks with some sort of ToS routing/queueing. This can be fixed by assigning a useful DSCP afterwards using iptables:

iptables -I OUTPUT 1 -t mangle -m dscp --dscp 0 -j DSCP --set-dscp 0x04

http://iptables-tutorial.frozentux.net/iptables-tutorial.html

Related notes for 'ssh':
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Related notes for 'network':
Devolo ISDN router fix
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