【发布时间】:2017-11-22 01:28:21
【问题描述】:
我已经打开了端口,但仍然无法正常工作。
来自我本地机器上的 gcloud:
C:\Program Files (x86)\Google\Cloud SDK>gcloud compute firewall-rules list
To show all fields of the firewall, please show in JSON format: --format=json
To show all fields in table format, please see the examples in --help.
NAME NETWORK DIRECTION PRIORITY ALLOW DENY
default-allow-https default INGRESS 1000 tcp:443
default-allow-icmp default INGRESS 65534 icmp
default-allow-internal default INGRESS 65534 tcp:0-65535,udp:0-65535,icmp
default-allow-rdp default INGRESS 65534 tcp:3389
default-allow-ssh default INGRESS 65534 tcp:22
django default EGRESS 1000 tcp:8000,tcp:80,tcp:8080,tcp:443
django-in default INGRESS 1000 tcp:8000,tcp:80,tcp:8080,tcp:443
来自谷歌云上的实例:
admin-u5214628@instance-1:~$ wget localhost:8080
--2017-11-22 01:23:56-- http://localhost:8080/
Resolving localhost (localhost)... 127.0.0.1
Connecting to localhost (localhost)|127.0.0.1|:8080... connected.
HTTP request sent, awaiting response... 302 FOUND
Location: http://localhost:8080/login/?next=/ [following]
--2017-11-22 01:23:56-- http://localhost:8080/login/?next=/
Connecting to localhost (localhost)|127.0.0.1|:8080... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/html]
Saving to: ‘index.html’
index.html [ <=> ] 6.26K --.-KB/s in 0s
2017-11-22 01:23:56 (161 MB/s) - ‘index.html’ saved [6411]
但是通过外部ip,什么都没有显示:
http://35.197.1.158:8080/
我通过以下命令检查了端口:
root@instance-1:/etc# netstat -ntlp | grep LISTEN
tcp 0 0 127.0.0.1:6379 0.0.0.0:* LISTEN 1539/redis-server 1
tcp 0 0 127.0.0.1:8080 0.0.0.0:* LISTEN 2138/python
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1735/sshd
tcp6 0 0 :::22 :::* LISTEN 1735/sshd
我不确定这对于 Ubuntu 防火墙设置是否足够?我觉得还可以。
在实例上,我检查了我能想到的所有内容。
还有 UFW(简单的防火墙):
root@instance-1:~# ufw status
Status: inactive
据我了解,这意味着它已关闭,因此不会阻止任何内容。
按照建议,我尝试配置iptables:
iptables -P INPUT ACCEPT
iptables -A INPUT -p tcp -m tcp --dport 8080 -j ACCEPT
iptables -P OUTPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -F
iptables -X
iptables -t nat -F
iptables -t nat -X
iptables -t mangle -F
iptables -t mangle -X
然后我保存它:
root@instance-1:~# iptables-save -c
# Generated by iptables-save v1.6.0 on Thu Nov 23 00:16:44 2017
*mangle
:PREROUTING ACCEPT [175:18493]
:INPUT ACCEPT [175:18493]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [154:15965]
:POSTROUTING ACCEPT [154:15965]
COMMIT
# Completed on Thu Nov 23 00:16:44 2017
# Generated by iptables-save v1.6.0 on Thu Nov 23 00:16:44 2017
*nat
:PREROUTING ACCEPT [6:300]
:INPUT ACCEPT [6:300]
:OUTPUT ACCEPT [6:360]
:POSTROUTING ACCEPT [6:360]
COMMIT
# Completed on Thu Nov 23 00:16:44 2017
# Generated by iptables-save v1.6.0 on Thu Nov 23 00:16:44 2017
*filter
:INPUT ACCEPT [169:18193]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [163:17013]
[6:300] -A INPUT -p tcp -m tcp --dport 8080 -j ACCEPT
[0:0] -A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
COMMIT
# Completed on Thu Nov 23 00:16:44 2017
现在看起来像这样:
root@instance-1:~# iptables -v -n -x -L
Chain INPUT (policy ACCEPT 80 packets, 5855 bytes)
pkts bytes target prot opt in out source destination
0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:8080
0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:80
Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 52 packets, 6047 bytes)
pkts bytes target prot opt in out source destination
为了确保规则得到应用并生效:
iptables-save > /etc/iptables.rules
iptables-apply /etc/iptables.rules
我认为我不需要重新启动/重置实例。
我想我需要forward traffic to local ip:
# sysctl net.ipv4.ip_forward=1
# iptables -t nat -A PREROUTING -p tcp --dport 8080 -j DNAT --to-destination 127.0.0.1:8000
# iptables -t nat -A POSTROUTING -j MASQUERADE
# python manage.py runserver
Performing system checks...
System check identified no issues (0 silenced).
November 24, 2017 - 17:54:00
Django version 1.8.18, using settings 'codebench.settings'
Starting development server at http://127.0.0.1:8000/
这种方法行不通……
试过了:
python manage.py runserver 0.0.0.0:8080 &
这肯定在我的本地机器上工作,只是在谷歌实例上不行,我很困惑。
【问题讨论】:
标签: django google-cloud-platform firewall iptables portforwarding