linux ping不了外网

ifconfig # 查看网络接口配置
ip route show # 查看路由表
cat /etc/resolv.conf # 查看DNS设置

ping 192.168.1.1 # 假设这是你的网关地址

sudo iptables -L # 查看iptables规则

sudo iptables -A INPUT -p icmp --icmp-type echo-request -j ACCEPT

nslookup www.google.com

traceroute www.google.com

#!/bin/bash

# 检查网络接口配置
echo "Checking network interfaces..."
ifconfig

# 检查路由表
echo "Checking route table..."
ip route show

# 检查DNS设置
echo "Checking DNS settings..."
cat /etc/resolv.conf

# 测试网关连通性
echo "Pinging gateway..."
ping -c 4 192.168.1.1

# 检查防火墙规则
echo "Checking firewall rules..."
sudo iptables -L

# 测试DNS解析
echo "Testing DNS resolution..."
nslookup www.google.com

# 使用traceroute诊断路由问题
echo "Tracing route to www.google.com..."
traceroute www.google.com