gistfile1.txt

ubuntu@chonk:~$ sudo systemctl status snap.conjure-up.bridge.service 
● snap.conjure-up.bridge.service - Service for snap application conjure-up.bridge
   Loaded: loaded (/etc/systemd/system/snap.conjure-up.bridge.service; enabled; vendor preset: enabled)
   Active: inactive (dead) since Thu 2017-02-16 20:32:12 UTC; 2min 27s ago
  Process: 1400 ExecStop=/usr/bin/snap run --command=stop conjure-up.bridge (code=exited, status=0/SUCCESS)
  Process: 1208 ExecStart=/usr/bin/snap run conjure-up.bridge (code=exited, status=0/SUCCESS)
 Main PID: 1208 (code=exited, status=0/SUCCESS)

Feb 16 20:32:11 chonk snap[1208]: + iptables -I FORWARD -i conjureup0 -j ACCEPT
Feb 16 20:32:11 chonk snap[1208]: + iptables -I FORWARD -o conjureup0 -j ACCEPT
Feb 16 20:32:11 chonk snap[1208]: + iptables -t nat -A POSTROUTING -s 10.99.0.1/24 ! -d 10.99.0.1/24 -j MASQUERADE
Feb 16 20:32:11 chonk snap[1208]: + iptables -I INPUT -i conjureup0 -p tcp -m tcp --dport 53 -j ACCEPT
Feb 16 20:32:11 chonk snap[1208]: + iptables -I INPUT -i conjureup0 -p udp -m udp --dport 53 -j ACCEPT
Feb 16 20:32:11 chonk snap[1208]: + iptables -I INPUT -i conjureup0 -p tcp -m tcp --dport 67 -j ACCEPT
Feb 16 20:32:11 chonk snap[1208]: + iptables -I INPUT -i conjureup0 -p udp -m udp --dport 67 -j ACCEPT
Feb 16 20:32:11 chonk /usr/bin/snap[1400]: cmd.go:105: DEBUG: restarting into "/snap/core/current/usr/bin/snap"
Feb 16 20:32:11 chonk /usr/bin/snap[1400]: cmd.go:59: DEBUG: re-exec disabled by user
Feb 16 20:32:12 chonk systemd[1]: Started Service for snap application conjure-up.bridge.

gistfile2.txt

ubuntu@chonk:~$ sudo /usr/bin/snap run conjure-up.bridge
+ ip link add dev conjureup0 type bridge
RTNETLINK answers: File exists
+ true
+ ip addr add 10.99.0.1/24 dev conjureup0
RTNETLINK answers: File exists
+ true
+ ip link set dev conjureup0 up
+ iptables -I FORWARD -i conjureup0 -j ACCEPT
+ iptables -I FORWARD -o conjureup0 -j ACCEPT
+ iptables -t nat -A POSTROUTING -s 10.99.0.1/24 ! -d 10.99.0.1/24 -j MASQUERADE
+ iptables -I INPUT -i conjureup0 -p tcp -m tcp --dport 53 -j ACCEPT
+ iptables -I INPUT -i conjureup0 -p udp -m udp --dport 53 -j ACCEPT
+ iptables -I INPUT -i conjureup0 -p tcp -m tcp --dport 67 -j ACCEPT
+ iptables -I INPUT -i conjureup0 -p udp -m udp --dport 67 -j ACCEPT
ubuntu@chonk:~$ ifconfig
conjureup0 Link encap:Ethernet  HWaddr ee:4d:5e:9e:b4:8a  
          inet addr:10.99.0.1  Bcast:0.0.0.0  Mask:255.255.255.0
          inet6 addr: fe80::ec4d:5eff:fe9e:b48a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:828 (828.0 B)

eth0      Link encap:Ethernet  HWaddr ec:a8:6b:fe:15:75  
          inet addr:172.16.0.13  Bcast:172.16.0.255  Mask:255.255.255.0
          inet6 addr: fe80::eea8:6bff:fefe:1575/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1122 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1229 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:132171 (132.1 KB)  TX bytes:185412 (185.4 KB)
          Interrupt:20 Memory:f7c00000-f7c20000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:1 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1 
          RX bytes:88 (88.0 B)  TX bytes:88 (88.0 B)

ubuntu@chonk:~$ iptables -L -t nat
iptables v1.6.0: can't initialize iptables table `nat': Permission denied (you must be root)
Perhaps iptables or your kernel needs to be upgraded.
ubuntu@chonk:~$ sudo iptables -L -t nat
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination         

Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination         
MASQUERADE  all  --  10.99.0.0/24        !10.99.0.0/24