VPN Client Connection Linux server access slows down how to solve

VPN Client Connection Linux server access slows down how to solve

There are three ways to solve the problem:

Method One: Edit pptpd source code, increase MTU;

Method Two: Use a script to increase the MTU after the PPTP interface is connected to the up;

Method III: Do not use MPPE encryption;

The first, although fundamentally solves the problem, but because the level problem gives up; the third because of the cancellation of transmission encryption, psychological feel unsafe, also gave up;

Method Two

/etc/ppp/ip-up.d/mppefixmtu.sh

#!/bin/sh

current_mtu= "' IP link Show $ | Grep-po ' (<=MTU) ([0-9]+) ' "

fixed_mtu= "' Expr $CURRENT _mtu + 4 '"

IP link set $FIXED MTU _MTU

Make sure the script has executable permissions

chmod 755/etc/ppp/ip-up.d/mppefixmtu.sh

This allows the MTU plus 4 to be compatible with Windows MPPE.