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Fix Static NAT/Port Forwarding when VM NIC is not the default #13200

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Fix Static NAT/Port Forwarding when VM NIC is not the default #13200

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2a88f86
Fix Static NAT/Port Forwarding when VM NIC is not the default
sudo87 May 20, 2026
4a9d0f4
rewrite source only for non-default nics
sudo87 May 21, 2026
6d8746f
add config network.nic.snat.enabled to setup nic aware snat rule
sudo87 May 22, 2026
ba07131
Merge branch 'main' into fixStaticnatNondefault
DaanHoogland Jul 20, 2026
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9 changes: 8 additions & 1 deletion systemvm/debian/opt/cloud/bin/configure.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1448,7 +1448,7 @@ def forward_vr(self, rule):
)
fw4 = "-j SNAT --to-source %s -A POSTROUTING -s %s -d %s/32 -o %s -p %s -m %s --dport %s" % \
(
self.getGuestIp(),
self.getGuestIpByIp(rule['internal_ip']),
self.getNetworkByIp(rule['internal_ip']),
rule['internal_ip'],
internal_fwinterface,
Expand Down Expand Up @@ -1567,6 +1567,13 @@ def processStaticNatRule(self, rule):
self.fw.append(["nat", "front", "-A POSTROUTING -s %s -d %s -j SNAT -o %s --to-source %s" %
(self.getNetworkByIp(rule['internal_ip']), rule["internal_ip"], self.getDeviceByIp(rule["internal_ip"]), self.getGuestIpByIp(rule["internal_ip"]))])

internal_device = self.getDeviceByIp(rule["internal_ip"])
internal_vr_ip = self.getGuestIpByIp(rule["internal_ip"])
if internal_device and internal_vr_ip and internal_device != device:
self.fw.append(["nat", "front",
"-A POSTROUTING -o %s -d %s/32 -j SNAT --to-source %s" %
(internal_device, rule["internal_ip"], internal_vr_ip)])
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class IpTablesExecutor:

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