我重新启动了服务器，一个奇怪的问题出来了。我在ArchLinux上运行，客户端是Ubuntu，Android和Mac。
问题在于，通过客户端访问Internet的速度很慢，大约为2ko / s，然后逐渐停止。
但是，从服务器直接下载某些内容到客户端是全速的。而且，很明显，来自服务器的Internet处于全速状态（40mo / s）。
我不知道重新启动后发生了什么，但是此问题在所有客户端上都存在，并且仅与将openvpn转发到Internet的流量有关。
编辑：尝试与tcp，没有解决。编辑：测试了各种片段/ mtu设置，没有更改。
这是我的所有conf：
╭─<root@Alduin>-</etc/openvpn>-<1:45:07>-◇
╰─➤ cat Alduin.conf ccd/Thunderaan
local 212.83.129.104
port 1194
proto udp
dev tun
ca keys/ca.crt
cert keys/Alduin.crt
key keys/Alduin.key
dh keys/dh1024.pem
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
push "dhcp-option DNS 10.8.0.1"
client-to-client
keepalive 5 60
ping-timer-rem
comp-lzo
persist-key
persist-tun
status openvpn-status.log
verb 3
client-config-dir ccd
topology subnet
ccd from here +++++++++++++++
ifconfig-push 10.8.0.2 255.255.255.0
push "redirect-gateway def1"
客户端配置：
client
dev tun
proto udp
remote 212.83.129.104 1194
resolv-retry infinite
nobind
persist-key
persist-tun
ca ca.crt
cert name.crt
key name.key
ns-cert-type server
comp-lzo
verb 3
以及一些可以帮助您的输出：
╭─<cubox@Alduin>-<~>-<1:49:43>-◇
╰─➤ ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
link/ether b8:ac:6f:94:e2:4e brd ff:ff:ff:ff:ff:ff
inet 88.190.15.135/24 scope global eno1
valid_lft forever preferred_lft forever
inet 212.83.129.104/32 scope global eno1
valid_lft forever preferred_lft forever
inet6 2001:bc8:300a:dead::b12d/64 scope global
valid_lft forever preferred_lft forever
inet6 2a01:e0b:1000:15:baac:6fff:fe94:e24e/64 scope global dynamic
valid_lft 2592000sec preferred_lft 604800sec
inet6 fe80::baac:6fff:fe94:e24e/64 scope link
valid_lft forever preferred_lft forever
3: eno2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
link/ether b8:ac:6f:94:e2:4f brd ff:ff:ff:ff:ff:ff
6: tun0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 100
link/none
inet 10.8.0.1/24 brd 10.8.0.255 scope global tun0
valid_lft forever preferred_lft forever
╭─<cubox@Alduin>-<~>-<1:49:47>-◇
╰─➤ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default 88-190-15-1.rev 0.0.0.0 UG 0 0 0 eno1
10.8.0.0 * 255.255.255.0 U 0 0 0 tun0
88.190.15.0 * 255.255.255.0 U 0 0 0 eno1
╭─<cubox@Alduin>-<~>-<1:49:51>-◇
╰─➤ route -6
Kernel IPv6 routing table
Destination Next Hop Flag Met Ref Use If
::1/128 :: U 256 0 0 lo
2001:bc8:300a:dead::/64 :: U 256 0 0 eno1
2a01:e0b:1000:15::/64 :: UAe 256 0 0 eno1
fe80::/64 :: U 256 0 0 eno1
::/0 fe80::225:45ff:fef6:947f UGDAe 1024 2 0 eno1
::/0 :: !n -1 1 1891 lo
::1/128 :: Un 0 2 5227 lo
2001:bc8:300a:dead::/128 :: Un 0 1 0 lo
2001:bc8:300a:dead::b12d/128 :: Un 0 1 131 lo
2a01:e0b:1000:15::/128 :: Un 0 1 0 lo
2a01:e0b:1000:15:baac:6fff:fe94:e24e/128 :: Un 0 3 29356 lo
fe80::/128 :: Un 0 1 0 lo
fe80::baac:6fff:fe94:e24e/128 :: Un 0 1 311 lo
ff00::/8 :: U 256 0 0 eno1
::/0 :: !n -1 1 1891 lo
-A POSTROUTING -s 10.8.0.0/24 -o eno1 -j MASQUERADE # The iptables rule
iptables规则是服务器上唯一活动的规则。
╰─➤ tc qd
qdisc mq 0: dev eno1 root
qdisc pfifo_fast 0: dev tun0 root refcnt 2 bands 3 priomap 1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1
编辑：这是来自Archlinux客户端连接的日志。
Oct 2 16:54:17 Groat ovpn-openvpn[9216]: OpenVPN 2.2.1 x86_64-linux-gnu [SSL] [LZO2] [EPOLL] [PKCS11] [eurephia] [MH] [PF_INET6] [IPv6 payload 20110424-2 (2.2RC2)] built on Feb 13 2013
Oct 2 16:54:17 Groat ovpn-openvpn[9216]: NOTE: the current --script-security setting may allow this configuration to call user-defined scripts
Oct 2 16:54:17 Groat ovpn-openvpn[9216]: LZO compression initialized
Oct 2 16:54:17 Groat ovpn-openvpn[9216]: Control Channel MTU parms [ L:1542 D:138 EF:38 EB:0 ET:0 EL:0 ]
Oct 2 16:54:17 Groat ovpn-openvpn[9216]: Socket Buffers: R=[212992->131072] S=[212992->131072]
Oct 2 16:54:17 Groat ovpn-openvpn[9216]: Data Channel MTU parms [ L:1542 D:1450 EF:42 EB:135 ET:0 EL:0 AF:3/1 ]
Oct 2 16:54:17 Groat ovpn-openvpn[9216]: Local Options hash (VER=V4): '41690919'
Oct 2 16:54:17 Groat ovpn-openvpn[9216]: Expected Remote Options hash (VER=V4): '530fdded'
Oct 2 16:54:17 Groat ovpn-openvpn[9217]: UDPv4 link local: [undef]
Oct 2 16:54:17 Groat ovpn-openvpn[9217]: UDPv4 link remote: [AF_INET]212.83.129.104:1194
Oct 2 16:54:17 Groat ovpn-openvpn[9217]: TLS: Initial packet from [AF_INET]212.83.129.104:1194, sid=edfcb034 3452d72c
Oct 2 16:54:17 Groat ovpn-openvpn[9217]: VERIFY OK: depth=1, /C=FR/ST=FR/L=Paris/O=Dragonborn/CN=Dragonborn_CA/emailAddress=cubox@cubox.me
Oct 2 16:54:17 Groat ovpn-openvpn[9217]: VERIFY OK: nsCertType=SERVER
Oct 2 16:54:17 Groat ovpn-openvpn[9217]: VERIFY OK: depth=0, /C=FR/ST=FR/L=Paris/O=Dragonborn/CN=Dragonborn/emailAddress=cubox@cubox.me
Oct 2 16:54:17 Groat ovpn-openvpn[9217]: Data Channel Encrypt: Cipher 'BF-CBC' initialized with 128 bit key
Oct 2 16:54:17 Groat ovpn-openvpn[9217]: Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Oct 2 16:54:17 Groat ovpn-openvpn[9217]: Data Channel Decrypt: Cipher 'BF-CBC' initialized with 128 bit key
Oct 2 16:54:17 Groat ovpn-openvpn[9217]: Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Oct 2 16:54:17 Groat ovpn-openvpn[9217]: Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 1024 bit RSA
Oct 2 16:54:17 Groat ovpn-openvpn[9217]: [Dragonborn] Peer Connection Initiated with [AF_INET]212.83.129.104:1194
Oct 2 16:54:20 Groat ovpn-openvpn[9217]: SENT CONTROL [Dragonborn]: 'PUSH_REQUEST' (status=1)
Oct 2 16:54:20 Groat ovpn-openvpn[9217]: PUSH: Received control message: 'PUSH_REPLY,dhcp-option DNS 10.8.0.1,route 212.83.129.0 255.255.255.0,route-gateway 10.8.0.1,topology subnet,ping 5,ping-restart 60,redirect-gateway def1,ifconfig 10.8.0.3 255.255.255.0'
Oct 2 16:54:20 Groat ovpn-openvpn[9217]: OPTIONS IMPORT: timers and/or timeouts modified
Oct 2 16:54:20 Groat ovpn-openvpn[9217]: OPTIONS IMPORT: --ifconfig/up options modified
Oct 2 16:54:20 Groat ovpn-openvpn[9217]: OPTIONS IMPORT: route options modified
Oct 2 16:54:20 Groat ovpn-openvpn[9217]: OPTIONS IMPORT: route-related options modified
Oct 2 16:54:20 Groat ovpn-openvpn[9217]: OPTIONS IMPORT: --ip-win32 and/or --dhcp-option options modified
Oct 2 16:54:20 Groat ovpn-openvpn[9217]: ROUTE default_gateway=192.168.1.254
Oct 2 16:54:20 Groat ovpn-openvpn[9217]: TUN/TAP device tun0 opened
Oct 2 16:54:20 Groat ovpn-openvpn[9217]: TUN/TAP TX queue length set to 100
Oct 2 16:54:20 Groat ovpn-openvpn[9217]: do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0
Oct 2 16:54:20 Groat ovpn-openvpn[9217]: /sbin/ifconfig tun0 10.8.0.3 netmask 255.255.255.0 mtu 1500 broadcast 10.8.0.255
Oct 2 16:54:20 Groat ovpn-openvpn[9217]: /sbin/route add -net 212.83.129.104 netmask 255.255.255.255 gw 192.168.1.254
Oct 2 16:54:20 Groat ovpn-openvpn[9217]: /sbin/route add -net 0.0.0.0 netmask 128.0.0.0 gw 10.8.0.1
Oct 2 16:54:20 Groat ovpn-openvpn[9217]: /sbin/route add -net 128.0.0.0 netmask 128.0.0.0 gw 10.8.0.1
Oct 2 16:54:20 Groat ovpn-openvpn[9217]: /sbin/route add -net 212.83.129.0 netmask 255.255.255.0 gw 10.8.0.1
Oct 2 16:54:20 Groat ovpn-openvpn[9217]: Initialization Sequence Completed
编辑：这是直接下载文件的服务器的tcpdump：http : //sprunge.us/aaJX 这是下载此资源的客户端：http : //sprunge.us/WUCC，这是来自另一个openvpn的普通客户端（工作）服务器：http : //www4.slashusr.com/57552.tcpdump
编辑：如评论中所述，这是原始tcpdump捕获。从服务器捕获tun0失败，我不知道为什么。服务器显示在这里，客户端显示tun0，客户端显示在外面，服务器直接下载文件。
编辑：服务器正在运行i3，该i3随时都不会使用（即使在openvpn使用期间也不会使用）。对于客户端而言，i7完全空闲。
编辑：问题仍然在这里。请帮忙 ：（
我认为您已经看过Wireshark / tcpdump的一些捕获内容了吗？如果在正确的位置进行捕获，几乎可以肯定会在捕获中找到答案。
—
Zoredache
我从客户端下载一个eno1界面上有一个tcpdump，从服务器下载一个（相同文件）。还有一个来自可用的openvpn客户端。我将编辑问题。
—
Cubox
您可以在传输流量时从客户端和服务器添加cpu信息吗？
—
杰德·丹尼尔斯
在您的tcpdump中，我看不到流量缓慢（可能太短了）。每个客户端都获得相同的IP地址10.8.0.2？您可以忽略它，而是将路由推送到您的网络212.83.129.0吗？
—
ott--
每个客户端都有自己的ccd和自己的IP地址。我不明白通往网络的路由是什么意思。
—
Cubox