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The original rule iptables -t nat -D POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP
didn't work and VPN didn't have internet. don't know why it worked on other centos 7 servers.
it produced iptables: No chain/target/match by that name.

but iptables -t nat -A POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to-source $IP
worked

[root@vps ~]# cat /etc/*release*
CentOS Linux release 7.4.1708 (Core) 
Derived from Red Hat Enterprise Linux 7.4 (Source)
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"

CentOS Linux release 7.4.1708 (Core) 
CentOS Linux release 7.4.1708 (Core) 
cpe:/o:centos:centos:7
This commit is contained in:
Luka Paunović 2018-02-21 17:32:13 +01:00 committed by GitHub
parent 33452242a1
commit dfd9808530
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1 changed files with 2 additions and 2 deletions
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openvpn-install.sh
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@ -142,7 +142,7 @@ if [[ -e /etc/openvpn/server.conf ]]; then
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 $IP
else
IP=$(grep 'iptables -t nat -A POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to ' $RCLOCAL | cut -d " " -f 14)
iptables -t nat -D POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP
iptables -t nat -D POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to-source $IP
sed -i '/iptables -t nat -A POSTROUTING -s 10.8.0.0\/24 ! -d 10.8.0.0\/24 -j SNAT --to /d' $RCLOCAL
if iptables -L -n | grep -qE '^ACCEPT'; then
iptables -D INPUT -p $PROTOCOL --dport $PORT -j ACCEPT