open***隧道搭建使用（1）
# 获取本机所使用公网
ip wget -T 10 -t 1 -4qO- "http://ip1.dynupdate.no-ip.com/" || curl -m 10 -4Ls "http://ip1.dynupdate.no-ip.com/"
1.一键安装脚本
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 | #!/bin/bash## https://github.com/Nyr/openvpn-install## Copyright (c) 2013 Nyr. Released under the MIT License.# Detect Debian users running the script with "sh" instead of bashif readlink /proc/$$/exe | grep -q "dash"; then echo 'This installer needs to be run with "bash", not "sh".' exitfi# Discard stdin. Needed when running from an one-liner which includes a newlineread -N 999999 -t 0.001# Detect OpenVZ 6if [[ $(uname -r | cut -d "." -f 1) -eq 2 ]]; then echo "The system is running an old kernel, which is incompatible with this installer." exitfi# Detect OS# $os_version variables aren't always in use, but are kept here for convenienceif grep -qs "ubuntu" /etc/os-release; then os="ubuntu" os_version=$(grep 'VERSION_ID' /etc/os-release | cut -d '"' -f 2 | tr -d '.') group_name="nogroup"elif [[ -e /etc/debian_version ]]; then os="debian" os_version=$(grep -oE '[0-9]+' /etc/debian_version | head -1) group_name="nogroup"elif [[ -e /etc/almalinux-release || -e /etc/rocky-release || -e /etc/centos-release ]]; then os="centos" os_version=$(grep -shoE '[0-9]+' /etc/almalinux-release /etc/rocky-release /etc/centos-release | head -1) group_name="nobody"elif [[ -e /etc/fedora-release ]]; then os="fedora" os_version=$(grep -oE '[0-9]+' /etc/fedora-release | head -1) group_name="nobody"else echo "This installer seems to be running on an unsupported distribution.Supported distros are Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS and Fedora." exitfiif [[ "$os" == "ubuntu" && "$os_version" -lt 1804 ]]; then echo "Ubuntu 18.04 or higher is required to use this installer.This version of Ubuntu is too old and unsupported." exitfiif [[ "$os" == "debian" && "$os_version" -lt 9 ]]; then echo "Debian 9 or higher is required to use this installer.This version of Debian is too old and unsupported." exitfiif [[ "$os" == "centos" && "$os_version" -lt 7 ]]; then echo "CentOS 7 or higher is required to use this installer.This version of CentOS is too old and unsupported." exitfi# Detect environments where $PATH does not include the sbin directoriesif ! grep -q sbin <<< "$PATH"; then echo '$PATH does not include sbin. Try using "su -" instead of "su".' exitfiif [[ "$EUID" -ne 0 ]]; then echo "This installer needs to be run with superuser privileges." exitfiif [[ ! -e /dev/net/tun ]] || ! ( exec 7<>/dev/net/tun ) 2>/dev/null; then echo "The system does not have the TUN device available.TUN needs to be enabled before running this installer." exitfinew_client () { # Generates the custom client.ovpn { cat /etc/openvpn/server/client-common.txt echo "<ca>" cat /etc/openvpn/server/easy-rsa/pki/ca.crt echo "</ca>" echo "<cert>" sed -ne '/BEGIN CERTIFICATE/,$ p' /etc/openvpn/server/easy-rsa/pki/issued/"$client".crt echo "</cert>" echo "<key>" cat /etc/openvpn/server/easy-rsa/pki/private/"$client".key echo "</key>" echo "<tls-crypt>" sed -ne '/BEGIN OpenVPN Static key/,$ p' /etc/openvpn/server/tc.key echo "</tls-crypt>" } > ~/"$client".ovpn}if [[ ! -e /etc/openvpn/server/server.conf ]]; then # Detect some Debian minimal setups where neither wget nor curl are installed if ! hash wget 2>/dev/null && ! hash curl 2>/dev/null; then echo "Wget is required to use this installer." read -n1 -r -p "Press any key to install Wget and continue..." apt-get update apt-get install -y wget fi clear echo 'Welcome to this OpenVPN road warrior installer!' # If system has a single IPv4, it is selected automatically. Else, ask the user if [[ $(ip -4 addr | grep inet | grep -vEc '127(\.[0-9]{1,3}){3}') -eq 1 ]]; then ip=$(ip -4 addr | grep inet | grep -vE '127(\.[0-9]{1,3}){3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}') else number_of_ip=$(ip -4 addr | grep inet | grep -vEc '127(\.[0-9]{1,3}){3}') echo echo "Which IPv4 address should be used?" ip -4 addr | grep inet | grep -vE '127(\.[0-9]{1,3}){3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}' | nl -s ') ' read -p "IPv4 address [1]: " ip_number until [[ -z "$ip_number" || "$ip_number" =~ ^[0-9]+$ && "$ip_number" -le "$number_of_ip" ]]; do echo "$ip_number: invalid selection." read -p "IPv4 address [1]: " ip_number done [[ -z "$ip_number" ]] && ip_number="1" ip=$(ip -4 addr | grep inet | grep -vE '127(\.[0-9]{1,3}){3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}' | sed -n "$ip_number"p) fi # If $ip is a private IP address, the server must be behind NAT if echo "$ip" | grep -qE '^(10\.|172\.1[6789]\.|172\.2[0-9]\.|172\.3[01]\.|192\.168)'; then echo echo "This server is behind NAT. What is the public IPv4 address or hostname?" # Get public IP and sanitize with grep get_public_ip=$(grep -m 1 -oE '^[0-9]{1,3}(\.[0-9]{1,3}){3}$' <<< "$(wget -T 10 -t 1 -4qO- "http://ip1.dynupdate.no-ip.com/" || curl -m 10 -4Ls "http://ip1.dynupdate.no-ip.com/")") read -p "Public IPv4 address / hostname [$get_public_ip]: " public_ip # If the checkip service is unavailable and user didn't provide input, ask again until [[ -n "$get_public_ip" || -n "$public_ip" ]]; do echo "Invalid input." read -p "Public IPv4 address / hostname: " public_ip done [[ -z "$public_ip" ]] && public_ip="$get_public_ip" fi # If system has a single IPv6, it is selected automatically if [[ $(ip -6 addr | grep -c 'inet6 [23]') -eq 1 ]]; then ip6=$(ip -6 addr | grep 'inet6 [23]' | cut -d '/' -f 1 | grep -oE '([0-9a-fA-F]{0,4}:){1,7}[0-9a-fA-F]{0,4}') fi # If system has multiple IPv6, ask the user to select one if [[ $(ip -6 addr | grep -c 'inet6 [23]') -gt 1 ]]; then number_of_ip6=$(ip -6 addr | grep -c 'inet6 [23]') echo echo "Which IPv6 address should be used?" ip -6 addr | grep 'inet6 [23]' | cut -d '/' -f 1 | grep -oE '([0-9a-fA-F]{0,4}:){1,7}[0-9a-fA-F]{0,4}' | nl -s ') ' read -p "IPv6 address [1]: " ip6_number until [[ -z "$ip6_number" || "$ip6_number" =~ ^[0-9]+$ && "$ip6_number" -le "$number_of_ip6" ]]; do echo "$ip6_number: invalid selection." read -p "IPv6 address [1]: " ip6_number done [[ -z "$ip6_number" ]] && ip6_number="1" ip6=$(ip -6 addr | grep 'inet6 [23]' | cut -d '/' -f 1 | grep -oE '([0-9a-fA-F]{0,4}:){1,7}[0-9a-fA-F]{0,4}' | sed -n "$ip6_number"p) fi echo echo "Which protocol should OpenVPN use?" echo " 1) UDP (recommended)" echo " 2) TCP" read -p "Protocol [1]: " protocol until [[ -z "$protocol" || "$protocol" =~ ^[12]$ ]]; do echo "$protocol: invalid selection." read -p "Protocol [1]: " protocol done case "$protocol" in 1|"") protocol=udp ;; 2) protocol=tcp ;; esac echo echo "What port should OpenVPN listen to?" read -p "Port [1194]: " port until [[ -z "$port" || "$port" =~ ^[0-9]+$ && "$port" -le 65535 ]]; do echo "$port: invalid port." read -p "Port [1194]: " port done [[ -z "$port" ]] && port="1194" echo echo "Select a DNS server for the clients:" echo " 1) Current system resolvers" echo " 2) Google" echo " 3) 1.1.1.1" echo " 4) OpenDNS" echo " 5) Quad9" echo " 6) AdGuard" read -p "DNS server [1]: " dns until [[ -z "$dns" || "$dns" =~ ^[1-6]$ ]]; do echo "$dns: invalid selection." read -p "DNS server [1]: " dns done echo echo "Enter a name for the first client:" read -p "Name [client]: " unsanitized_client # Allow a limited set of characters to avoid conflicts client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client") [[ -z "$client" ]] && client="client" echo echo "OpenVPN installation is ready to begin." # Install a firewall if firewalld or iptables are not already available if ! systemctl is-active --quiet firewalld.service && ! hash iptables 2>/dev/null; then if [[ "$os" == "centos" || "$os" == "fedora" ]]; then firewall="firewalld" # We don't want to silently enable firewalld, so we give a subtle warning # If the user continues, firewalld will be installed and enabled during setup echo "firewalld, which is required to manage routing tables, will also be installed." elif [[ "$os" == "debian" || "$os" == "ubuntu" ]]; then # iptables is way less invasive than firewalld so no warning is given firewall="iptables" fi fi read -n1 -r -p "Press any key to continue..." # If running inside a container, disable LimitNPROC to prevent conflicts if systemd-detect-virt -cq; then mkdir /etc/systemd/system/openvpn-server@server.service.d/ 2>/dev/null echo "[Service]LimitNPROC=infinity" > /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf fi if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then apt-get update apt-get install -y --no-install-recommends openvpn openssl ca-certificates $firewall elif [[ "$os" = "centos" ]]; then yum install -y epel-release yum install -y openvpn openssl ca-certificates tar $firewall else # Else, OS must be Fedora dnf install -y openvpn openssl ca-certificates tar $firewall fi # If firewalld was just installed, enable it if [[ "$firewall" == "firewalld" ]]; then systemctl enable --now firewalld.service fi # Get easy-rsa easy_rsa_url='https://github.com/OpenVPN/easy-rsa/releases/download/v3.1.5/EasyRSA-3.1.5.tgz' mkdir -p /etc/openvpn/server/easy-rsa/ { wget -qO- "$easy_rsa_url" 2>/dev/null || curl -sL "$easy_rsa_url" ; } | tar xz -C /etc/openvpn/server/easy-rsa/ --strip-components 1 chown -R root:root /etc/openvpn/server/easy-rsa/ cd /etc/openvpn/server/easy-rsa/ # Create the PKI, set up the CA and the server and client certificates ./easyrsa --batch init-pki ./easyrsa --batch build-ca nopass ./easyrsa --batch --days=3650 build-server-full server nopass ./easyrsa --batch --days=3650 build-client-full "$client" nopass ./easyrsa --batch --days=3650 gen-crl # Move the stuff we need cp pki/ca.crt pki/private/ca.key pki/issued/server.crt pki/private/server.key pki/crl.pem /etc/openvpn/server # CRL is read with each client connection, while OpenVPN is dropped to nobody chown nobody:"$group_name" /etc/openvpn/server/crl.pem # Without +x in the directory, OpenVPN can't run a stat() on the CRL file chmod o+x /etc/openvpn/server/ # Generate key for tls-crypt openvpn --genkey --secret /etc/openvpn/server/tc.key # Create the DH parameters file using the predefined ffdhe2048 group echo '-----BEGIN DH PARAMETERS-----MIIBCAKCAQEA//////////+t+FRYortKmq/cViAnPTzx2LnFg84tNpWp4TZBFGQz+8yTnc4kmz75fS/jY2MMddj2gbICrsRhetPfHtXV/WVhJDP1H18GbtCFY2VVPe0a87VXE15/V8k1mE8McODmi3fipona8+/och3xWKE2rec1MKzKT0g6eXq8CrGCsyT7YdEIqUuyyOP7uWrat2DX9GgdT0Kj3jlN9K5W7edjcrsZCwenyO4KbXCeAvzhzffi7MA0BM0oNC9hkXL+nOmFg/+OTxIy7vKBg8P+OxtMb61zO7X8vC7CIAXFjvGDfRaDssbzSibBsu/6iGtCOGEoXJf//////////wIBAg==-----END DH PARAMETERS-----' > /etc/openvpn/server/dh.pem # Generate server.conf echo "local $ipport $portproto $protocoldev tunca ca.crtcert server.crtkey server.keydh dh.pemauth SHA512tls-crypt tc.keytopology subnetserver 10.8.0.0 255.255.255.0" > /etc/openvpn/server/server.conf # IPv6 if [[ -z "$ip6" ]]; then echo 'push "redirect-gateway def1 bypass-dhcp"' >> /etc/openvpn/server/server.conf else echo 'server-ipv6 fddd:1194:1194:1194::/64' >> /etc/openvpn/server/server.conf echo 'push "redirect-gateway def1 ipv6 bypass-dhcp"' >> /etc/openvpn/server/server.conf fi echo 'ifconfig-pool-persist ipp.txt' >> /etc/openvpn/server/server.conf # DNS case "$dns" in 1|"") # Locate the proper resolv.conf # Needed for systems running systemd-resolved if grep '^nameserver' "/etc/resolv.conf" | grep -qv '127.0.0.53' ; then resolv_conf="/etc/resolv.conf" else resolv_conf="/run/systemd/resolve/resolv.conf" fi # Obtain the resolvers from resolv.conf and use them for OpenVPN grep -v '^#\|^;' "$resolv_conf" | grep '^nameserver' | grep -v '127.0.0.53' | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}' | while read line; do echo "push \"dhcp-option DNS $line\"" >> /etc/openvpn/server/server.conf done ;; 2) echo 'push "dhcp-option DNS 8.8.8.8"' >> /etc/openvpn/server/server.conf echo 'push "dhcp-option DNS 8.8.4.4"' >> /etc/openvpn/server/server.conf ;; 3) echo 'push "dhcp-option DNS 1.1.1.1"' >> /etc/openvpn/server/server.conf echo 'push "dhcp-option DNS 1.0.0.1"' >> /etc/openvpn/server/server.conf ;; 4) echo 'push "dhcp-option DNS 208.67.222.222"' >> /etc/openvpn/server/server.conf echo 'push "dhcp-option DNS 208.67.220.220"' >> /etc/openvpn/server/server.conf ;; 5) echo 'push "dhcp-option DNS 9.9.9.9"' >> /etc/openvpn/server/server.conf echo 'push "dhcp-option DNS 149.112.112.112"' >> /etc/openvpn/server/server.conf ;; 6) echo 'push "dhcp-option DNS 94.140.14.14"' >> /etc/openvpn/server/server.conf echo 'push "dhcp-option DNS 94.140.15.15"' >> /etc/openvpn/server/server.conf ;; esac echo 'push "block-outside-dns"' >> /etc/openvpn/server/server.conf echo "keepalive 10 120cipher AES-256-CBCuser nobodygroup $group_namepersist-keypersist-tunverb 3crl-verify crl.pem" >> /etc/openvpn/server/server.conf if [[ "$protocol" = "udp" ]]; then echo "explicit-exit-notify" >> /etc/openvpn/server/server.conf fi # Enable net.ipv4.ip_forward for the system echo 'net.ipv4.ip_forward=1' > /etc/sysctl.d/99-openvpn-forward.conf # Enable without waiting for a reboot or service restart echo 1 > /proc/sys/net/ipv4/ip_forward if [[ -n "$ip6" ]]; then # Enable net.ipv6.conf.all.forwarding for the system echo "net.ipv6.conf.all.forwarding=1" >> /etc/sysctl.d/99-openvpn-forward.conf # Enable without waiting for a reboot or service restart echo 1 > /proc/sys/net/ipv6/conf/all/forwarding fi if systemctl is-active --quiet firewalld.service; then # Using both permanent and not permanent rules to avoid a firewalld # reload. # We don't use --add-service=openvpn because that would only work with # the default port and protocol. firewall-cmd --add-port="$port"/"$protocol" firewall-cmd --zone=trusted --add-source=10.8.0.0/24 firewall-cmd --permanent --add-port="$port"/"$protocol" firewall-cmd --permanent --zone=trusted --add-source=10.8.0.0/24 # Set NAT for the VPN subnet firewall-cmd --direct --add-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to "$ip" firewall-cmd --permanent --direct --add-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to "$ip" if [[ -n "$ip6" ]]; then firewall-cmd --zone=trusted --add-source=fddd:1194:1194:1194::/64 firewall-cmd --permanent --zone=trusted --add-source=fddd:1194:1194:1194::/64 firewall-cmd --direct --add-rule ipv6 nat POSTROUTING 0 -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to "$ip6" firewall-cmd --permanent --direct --add-rule ipv6 nat POSTROUTING 0 -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to "$ip6" fi else # Create a service to set up persistent iptables rules iptables_path=$(command -v iptables) ip6tables_path=$(command -v ip6tables) # nf_tables is not available as standard in OVZ kernels. So use iptables-legacy # if we are in OVZ, with a nf_tables backend and iptables-legacy is available. if [[ $(systemd-detect-virt) == "openvz" ]] && readlink -f "$(command -v iptables)" | grep -q "nft" && hash iptables-legacy 2>/dev/null; then iptables_path=$(command -v iptables-legacy) ip6tables_path=$(command -v ip6tables-legacy) fi echo "[Unit]Before=network.target[Service]Type=oneshotExecStart=$iptables_path -t nat -A POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $ipExecStart=$iptables_path -I INPUT -p $protocol --dport $port -j ACCEPTExecStart=$iptables_path -I FORWARD -s 10.8.0.0/24 -j ACCEPTExecStart=$iptables_path -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPTExecStop=$iptables_path -t nat -D POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $ipExecStop=$iptables_path -D INPUT -p $protocol --dport $port -j ACCEPTExecStop=$iptables_path -D FORWARD -s 10.8.0.0/24 -j ACCEPTExecStop=$iptables_path -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT" > /etc/systemd/system/openvpn-iptables.service if [[ -n "$ip6" ]]; then echo "ExecStart=$ip6tables_path -t nat -A POSTROUTING -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to $ip6ExecStart=$ip6tables_path -I FORWARD -s fddd:1194:1194:1194::/64 -j ACCEPTExecStart=$ip6tables_path -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPTExecStop=$ip6tables_path -t nat -D POSTROUTING -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to $ip6ExecStop=$ip6tables_path -D FORWARD -s fddd:1194:1194:1194::/64 -j ACCEPTExecStop=$ip6tables_path -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT" >> /etc/systemd/system/openvpn-iptables.service fi echo "RemainAfterExit=yes[Install]WantedBy=multi-user.target" >> /etc/systemd/system/openvpn-iptables.service systemctl enable --now openvpn-iptables.service fi # If SELinux is enabled and a custom port was selected, we need this if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing" && [[ "$port" != 1194 ]]; then # Install semanage if not already present if ! hash semanage 2>/dev/null; then if [[ "$os_version" -eq 7 ]]; then # Centos 7 yum install -y policycoreutils-python else # CentOS 8 or Fedora dnf install -y policycoreutils-python-utils fi fi semanage port -a -t openvpn_port_t -p "$protocol" "$port" fi # If the server is behind NAT, use the correct IP address [[ -n "$public_ip" ]] && ip="$public_ip" # client-common.txt is created so we have a template to add further users later echo "clientdev tunproto $protocolremote $ip $portresolv-retry infinitenobindpersist-keypersist-tunremote-cert-tls serverauth SHA512cipher AES-256-CBCignore-unknown-option block-outside-dnsverb 3" > /etc/openvpn/server/client-common.txt # Enable and start the OpenVPN service systemctl enable --now openvpn-server@server.service # Generates the custom client.ovpn new_client echo echo "Finished!" echo echo "The client configuration is available in:" ~/"$client.ovpn" echo "New clients can be added by running this script again."else clear echo "OpenVPN is already installed." echo echo "Select an option:" echo " 1) Add a new client" echo " 2) Revoke an existing client" echo " 3) Remove OpenVPN" echo " 4) Exit" read -p "Option: " option until [[ "$option" =~ ^[1-4]$ ]]; do echo "$option: invalid selection." read -p "Option: " option done case "$option" in 1) echo echo "Provide a name for the client:" read -p "Name: " unsanitized_client client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client") while [[ -z "$client" || -e /etc/openvpn/server/easy-rsa/pki/issued/"$client".crt ]]; do echo "$client: invalid name." read -p "Name: " unsanitized_client client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client") done cd /etc/openvpn/server/easy-rsa/ ./easyrsa --batch --days=3650 build-client-full "$client" nopass # Generates the custom client.ovpn new_client echo echo "$client added. Configuration available in:" ~/"$client.ovpn" exit ;; 2) # This option could be documented a bit better and maybe even be simplified # ...but what can I say, I want some sleep too number_of_clients=$(tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep -c "^V") if [[ "$number_of_clients" = 0 ]]; then echo echo "There are no existing clients!" exit fi echo echo "Select the client to revoke:" tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | nl -s ') ' read -p "Client: " client_number until [[ "$client_number" =~ ^[0-9]+$ && "$client_number" -le "$number_of_clients" ]]; do echo "$client_number: invalid selection." read -p "Client: " client_number done client=$(tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | sed -n "$client_number"p) echo read -p "Confirm $client revocation? [y/N]: " revoke until [[ "$revoke" =~ ^[yYnN]*$ ]]; do echo "$revoke: invalid selection." read -p "Confirm $client revocation? [y/N]: " revoke done if [[ "$revoke" =~ ^[yY]$ ]]; then cd /etc/openvpn/server/easy-rsa/ ./easyrsa --batch revoke "$client" ./easyrsa --batch --days=3650 gen-crl rm -f /etc/openvpn/server/crl.pem cp /etc/openvpn/server/easy-rsa/pki/crl.pem /etc/openvpn/server/crl.pem # CRL is read with each client connection, when OpenVPN is dropped to nobody chown nobody:"$group_name" /etc/openvpn/server/crl.pem echo echo "$client revoked!" else echo echo "$client revocation aborted!" fi exit ;; 3) echo read -p "Confirm OpenVPN removal? [y/N]: " remove until [[ "$remove" =~ ^[yYnN]*$ ]]; do echo "$remove: invalid selection." read -p "Confirm OpenVPN removal? [y/N]: " remove done if [[ "$remove" =~ ^[yY]$ ]]; then port=$(grep '^port ' /etc/openvpn/server/server.conf | cut -d " " -f 2) protocol=$(grep '^proto ' /etc/openvpn/server/server.conf | cut -d " " -f 2) if systemctl is-active --quiet firewalld.service; then ip=$(firewall-cmd --direct --get-rules ipv4 nat POSTROUTING | grep '\-s 10.8.0.0/24 '"'"'!'"'"' -d 10.8.0.0/24' | grep -oE '[^ ]+$') # Using both permanent and not permanent rules to avoid a firewalld reload. firewall-cmd --remove-port="$port"/"$protocol" firewall-cmd --zone=trusted --remove-source=10.8.0.0/24 firewall-cmd --permanent --remove-port="$port"/"$protocol" firewall-cmd --permanent --zone=trusted --remove-source=10.8.0.0/24 firewall-cmd --direct --remove-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to "$ip" firewall-cmd --permanent --direct --remove-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to "$ip" if grep -qs "server-ipv6" /etc/openvpn/server/server.conf; then ip6=$(firewall-cmd --direct --get-rules ipv6 nat POSTROUTING | grep '\-s fddd:1194:1194:1194::/64 '"'"'!'"'"' -d fddd:1194:1194:1194::/64' | grep -oE '[^ ]+$') firewall-cmd --zone=trusted --remove-source=fddd:1194:1194:1194::/64 firewall-cmd --permanent --zone=trusted --remove-source=fddd:1194:1194:1194::/64 firewall-cmd --direct --remove-rule ipv6 nat POSTROUTING 0 -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to "$ip6" firewall-cmd --permanent --direct --remove-rule ipv6 nat POSTROUTING 0 -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to "$ip6" fi else systemctl disable --now openvpn-iptables.service rm -f /etc/systemd/system/openvpn-iptables.service fi if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing" && [[ "$port" != 1194 ]]; then semanage port -d -t openvpn_port_t -p "$protocol" "$port" fi systemctl disable --now openvpn-server@server.service rm -f /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf rm -f /etc/sysctl.d/99-openvpn-forward.conf if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then rm -rf /etc/openvpn/server apt-get remove --purge -y openvpn else # Else, OS must be CentOS or Fedora yum remove -y openvpn rm -rf /etc/openvpn/server fi echo echo "OpenVPN removed!" else echo echo "OpenVPN removal aborted!" fi exit ;; 4) exit ;; esacfi |
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