id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
1239	Multiple IP address UDP response error	wu3396@…		"### nginx conf 
sh-4.2#cat nginx.conf
user nobody;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;
events {
    worker_connections 1024;
}
stream {
    server {
        listen 10000 udp;
        return $time_iso8601;
        error_log /var/log/nginx/error.log;
    }
}

### server ipaddress
sh-4.2# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
    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: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    inet 172.22.12.8/23 brd 172.22.13.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet 172.22.12.67/32 scope global eth0
       valid_lft forever preferred_lft forever


#### The client tests are normal (connection ip: 172.22.12.8 ) ############
sh-4.2# nc -u 172.22.12.8 10000

2017-04-07T16:48:25+08:00
2017-04-07T16:48:27+08:00^C

sh-4.2#

#### no response ！ (connection ip: 172.22.12.67 ) ############
sh-4.2# nc -u 172.22.12.67 10000



^C
sh-4.2# 

### server tcpdump ############
sh-4.2# tcpdump -ln -i eth0 port 10000
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes

16:48:25.414499 IP 172.22.12.6.19160 > 172.22.12.8.ndmp: UDP, length 1
16:48:25.414722 IP 172.22.12.8.ndmp > 172.22.12.6.19160: UDP, length 25
16:48:27.814346 IP 172.22.12.6.19160 > 172.22.12.8.ndmp: UDP, length 1
16:48:27.814461 IP 172.22.12.8.ndmp > 172.22.12.6.19160: UDP, length 25

----------------------------------------------------------------------
16:49:27.023198 IP 172.22.12.6.59931 > 172.22.12.67.ndmp: UDP, length 1
16:49:27.023475 IP 172.22.12.8.ndmp > 172.22.12.6.59931: UDP, length 25
### source ip is should be 172.22.12.67 instead of 172.22.12.8 ########  

16:49:28.798889 IP 172.22.12.6.59931 > 172.22.12.67.ndmp: UDP, length 1
16:49:28.799039 IP 172.22.12.8.ndmp > 172.22.12.6.59931: UDP, length 25
16:49:30.551067 IP 172.22.12.6.59931 > 172.22.12.67.ndmp: UDP, length 1
16:49:30.551255 IP 172.22.12.8.ndmp > 172.22.12.6.59931: UDP, length 25

^C
10 packets captured
10 packets received by filter
0 packets dropped by kernel
sh-4.2# "	defect	closed	minor	1.11	other	1.11.x	fixed			Linux localhost.localdomain 3.10.0-514.el7.x86_64 #1 SMP Tue Nov 22 16:42:41 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux	"nginx version: nginx/1.11.13
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-11) (GCC) 
configure arguments: --prefix=/usr/local/nginx --with-stream --without-http"