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masquerade outgoing connections to public_ip (rebasing PR #21 on master) #27

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masquerade outgoing connections to public_ip (rebasing PR #21 on master) #27

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0e8069a
masquerade outgoing connections to public_ip (rebasing PR #21 on master)
chrisv2 Oct 1, 2018
7c63c4d
fix unittest
chrisv2 Oct 1, 2018
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4 changes: 3 additions & 1 deletion hooks
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,7 @@ import re
import subprocess
import sys

# python 2.6 support
# python 2.6 support
if "check_output" not in dir( subprocess ):
def f(*popenargs, **kwargs):
if 'stdout' in kwargs:
Expand Down Expand Up @@ -186,6 +186,8 @@ def insert_chains(action, dnat_chain, snat_chain, fwd_chain, public_ip, private_
"OUTPUT", "-d", public_ip, "-j", dnat_chain])
subprocess.call([IPTABLES_BINARY, "-t", "nat", action,
"PREROUTING", "-d", public_ip, "-j", dnat_chain])
subprocess.call([IPTABLES_BINARY, "-t", "nat", action, "POSTROUTING",
"-s", private_ip, "-p", "all", "-j", "SNAT", "--to-source", public_ip])
subprocess.call([IPTABLES_BINARY, "-t", "nat", action, "POSTROUTING",
"-s", private_ip, "-d", private_ip, "-j", snat_chain])
subprocess.call([IPTABLES_BINARY, "-t", "filter", action,
Expand Down
2 changes: 2 additions & 0 deletions test_qemu.py
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Original file line number Diff line number Diff line change
Expand Up @@ -72,6 +72,7 @@ def test_setup(self):
-t filter -A FWD-test -p tcp -d 127.0.0.1 --dport 443 -j ACCEPT -o virbr0
-t nat -I OUTPUT -d 192.168.1.1 -j DNAT-test
-t nat -I PREROUTING -d 192.168.1.1 -j DNAT-test
-t nat -I POSTROUTING -s 127.0.0.1 -p all -j SNAT --to-source 192.168.1.1
-t nat -I POSTROUTING -s 127.0.0.1 -d 127.0.0.1 -j SNAT-test
-t filter -I FORWARD -d 127.0.0.1 -j FWD-test
""")
Expand Down Expand Up @@ -100,6 +101,7 @@ def test_teardown(self):
expected_output = self.dedent("""
-t nat -D OUTPUT -d 192.168.1.1 -j DNAT-test
-t nat -D PREROUTING -d 192.168.1.1 -j DNAT-test
-t nat -D POSTROUTING -s 127.0.0.1 -p all -j SNAT --to-source 192.168.1.1
-t nat -D POSTROUTING -s 127.0.0.1 -d 127.0.0.1 -j SNAT-test
-t filter -D FORWARD -d 127.0.0.1 -j FWD-test
-t nat -F DNAT-test
Expand Down