Проблема в следующем:
UDP-трафик не проходит через мост, который создан на основе openvpn.
Сторона на сервере:
root@ne-vlezay80:~# iperf3 -s
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 10.194.0.200, port 33215
[ 5] local 10.194.0.3 port 5201 connected to 10.194.0.200 port 34161
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on tap0, link-type EN10MB (Ethernet), capture size 262144 bytes
22:42:47.763422 IP 10.0.0.2.55119 > 10.0.0.1.5201: Flags [S], seq 3125718720, win 27060, options [mss 1331,sackOK,TS val 1393120 ecr 0,nop,wscale 6], length 0
22:42:47.763448 IP 10.0.0.1.5201 > 10.0.0.2.55119: Flags [R.], seq 0, ack 3125718721, win 0, length 0
22:42:52.769112 ARP, Request who-has 10.0.0.1 tell 10.0.0.2, length 28
22:42:52.769119 ARP, Reply 10.0.0.1 is-at 52:54:74:22:98:84, length 28
22:42:53.130453 ARP, Request who-has 10.0.0.2 tell 10.0.0.1, length 28
22:42:53.130904 ARP, Reply 10.0.0.2 is-at b6:4b:ba:9c:6b:de, length 28
22:43:04.308320 IP 10.0.0.2.55120 > 10.0.0.1.5201: Flags [S], seq 3743037173, win 27060, options [mss 1331,sackOK,TS val 1397256 ecr 0,nop,wscale 6], length 0
22:43:04.308350 IP 10.0.0.1.5201 > 10.0.0.2.55120: Flags [S.], seq 402249507, ack 3743037174, win 26928, options [mss 2460,sackOK,TS val 742782266 ecr 1397256,nop,wscale 5], length 0
22:43:04.308639 IP 10.0.0.2.55120 > 10.0.0.1.5201: Flags [.], ack 1, win 423, options [nop,nop,TS val 1397256 ecr 742782266], length 0
22:43:04.349936 IP 10.0.0.2.55120 > 10.0.0.1.5201: Flags [P.], seq 1:38, ack 1, win 423, options [nop,nop,TS val 1397256 ecr 742782266], length 37
22:43:04.350318 IP 10.0.0.1.5201 > 10.0.0.2.55120: Flags [.], ack 38, win 842, options [nop,nop,TS val 742782308 ecr 1397256], length 0
22:43:04.350591 IP 10.0.0.1.5201 > 10.0.0.2.55120: Flags [P.], seq 1:2, ack 38, win 842, options [nop,nop,TS val 742782309 ecr 1397256], length 1
22:43:04.389198 IP 10.0.0.2.55120 > 10.0.0.1.5201: Flags [.], ack 2, win 423, options [nop,nop,TS val 1397277 ecr 742782309], length 0
22:43:04.430640 IP 10.0.0.2.55120 > 10.0.0.1.5201: Flags [P.], seq 38:42, ack 2, win 423, options [nop,nop,TS val 1397277 ecr 742782309], length 4
22:43:04.471432 IP 10.0.0.1.5201 > 10.0.0.2.55120: Flags [.], ack 42, win 842, options [nop,nop,TS val 742782430 ecr 1397277], length 0
22:43:04.472043 IP 10.0.0.2.55120 > 10.0.0.1.5201: Flags [P.], seq 42:117, ack 2, win 423, options [nop,nop,TS val 1397297 ecr 742782430], length 75
22:43:04.472342 IP 10.0.0.1.5201 > 10.0.0.2.55120: Flags [.], ack 117, win 842, options [nop,nop,TS val 742782430 ecr 1397297], length 0
22:43:04.472680 IP 10.0.0.1.5201 > 10.0.0.2.55120: Flags [P.], seq 2:3, ack 117, win 842, options [nop,nop,TS val 742782431 ecr 1397297], length 1
22:43:04.509327 IP 10.0.0.2.40220 > 10.0.0.1.5201: UDP, length 4
22:43:04.509728 IP 10.0.0.1.5201 > 10.0.0.2.40220: UDP, length 4
22:43:04.553083 IP 10.0.0.2.55120 > 10.0.0.1.5201: Flags [.], ack 3, win 423, options [nop,nop,TS val 1397317 ecr 742782431], length 0
22:43:04.553101 IP 10.0.0.1.5201 > 10.0.0.2.55120: Flags [P.], seq 3:5, ack 117, win 842, options [nop,nop,TS val 742782511 ecr 1397317], length 2
22:43:04.553355 IP 10.0.0.2.55120 > 10.0.0.1.5201: Flags [.], ack 5, win 423, options [nop,nop,TS val 1397318 ecr 742782511], length 0
22:43:04.553544 IP truncated-ip - 982 bytes missing! 10.0.0.2.40220 > 10.0.0.1.5201: UDP, bad length 8192 > 2472
22:43:04.553579 IP truncated-ip - 982 bytes missing! 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:04.553600 IP truncated-ip - 982 bytes missing! 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:04.553613 IP 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:04.653832 IP truncated-ip - 982 bytes missing! 10.0.0.2.40220 > 10.0.0.1.5201: UDP, bad length 8192 > 2472
22:43:04.653857 IP truncated-ip - 982 bytes missing! 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:04.653877 IP truncated-ip - 982 bytes missing! 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:04.653907 IP 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:04.753805 IP truncated-ip - 982 bytes missing! 10.0.0.2.40220 > 10.0.0.1.5201: UDP, bad length 8192 > 2472
22:43:04.754217 IP truncated-ip - 982 bytes missing! 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:04.754243 IP truncated-ip - 982 bytes missing! 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:04.754255 IP 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:04.754280 IP truncated-ip - 982 bytes missing! 10.0.0.2.40220 > 10.0.0.1.5201: UDP, bad length 8192 > 2472
22:43:04.754300 IP truncated-ip - 982 bytes missing! 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:04.754320 IP truncated-ip - 982 bytes missing! 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:04.754332 IP 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:04.853854 IP truncated-ip - 982 bytes missing! 10.0.0.2.40220 > 10.0.0.1.5201: UDP, bad length 8192 > 2472
22:43:04.853879 IP truncated-ip - 982 bytes missing! 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:04.853899 IP truncated-ip - 982 bytes missing! 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:04.853926 IP 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:04.953840 IP truncated-ip - 982 bytes missing! 10.0.0.2.40220 > 10.0.0.1.5201: UDP, bad length 8192 > 2472
22:43:04.953877 IP truncated-ip - 982 bytes missing! 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:04.953898 IP truncated-ip - 982 bytes missing! 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:04.953923 IP 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:04.953947 IP truncated-ip - 982 bytes missing! 10.0.0.2.40220 > 10.0.0.1.5201: UDP, bad length 8192 > 2472
22:43:04.953967 IP truncated-ip - 982 bytes missing! 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:04.953990 IP truncated-ip - 982 bytes missing! 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:05.053886 IP truncated-ip - 982 bytes missing! 10.0.0.2.40220 > 10.0.0.1.5201: UDP, bad length 8192 > 2472
22:43:05.054020 IP truncated-ip - 982 bytes missing! 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:05.054099 IP truncated-ip - 982 bytes missing! 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:05.054156 IP 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:05.054223 IP truncated-ip - 982 bytes missing! 10.0.0.2.40220 > 10.0.0.1.5201: UDP, bad length 8192 > 2472
22:43:05.054288 IP truncated-ip - 982 bytes missing! 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:05.054351 IP truncated-ip - 982 bytes missing! 10.0.0.2 > 10.0.0.1: ip-proto-17
22:43:05.054442 IP 10.0.0.2 > 10.0.0.1: ip-proto-17
...
