Port Forwarding tcp/udp conflict
Posted: 24. Aug 2015, 12:46
How can THIS be a conflict (tcp & udp)? See nfs 4 rules...
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Port Forwarding tcp/udp conflict
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Re: Port Forwarding tcp/udp conflict
Posted: 25. Aug 2015, 11:56
No reply to my question?
Re: Port Forwarding tcp/udp conflict
Posted: 25. Aug 2015, 13:34
Re: Port Forwarding tcp/udp conflict
Posted: 25. Aug 2015, 14:12
Virtualbox: 5.0.2 r102096 - guest addon installed
Host: Windows 7/32 (3,5Gb ram)
Guest: Linux Xububtu/32 (but the problem is VB core, Nat/PortForwarding console)
I don't think you need vm log, problem is before launching the vm, inside port forwarding editor. No log is written in vm path dir.
Host: Windows 7/32 (3,5Gb ram)
Guest: Linux Xububtu/32 (but the problem is VB core, Nat/PortForwarding console)
I don't think you need vm log, problem is before launching the vm, inside port forwarding editor. No log is written in vm path dir.
Re: Port Forwarding tcp/udp conflict
Posted: 25. Aug 2015, 14:19
I can only translate the msgbox error in Eng... for more understanding!!! 
Re: Port Forwarding tcp/udp conflict
Posted: 25. Aug 2015, 14:24
Post the results of the following from the hosts command window.
Code: Select all
VBoxManage list natnetworksRe: Port Forwarding tcp/udp conflict
Posted: 25. Aug 2015, 14:31
It seems that VirtualBox doesn't allow port forwarding for both TCP and UDP between the same IP address and ports.
I just tried to configure this combination myself and got the same error message.
I just tried to configure this combination myself and got the same error message.
Re: Port Forwarding tcp/udp conflict
Posted: 25. Aug 2015, 14:32
Code: Select all
#VBoxManage list natnetworks
NetworkName: NatNetwork
IP: 10.0.2.1
Network: 10.0.2.0/24
IPv6 Enabled: No
IPv6 Prefix:
DHCP Enabled: Yes
Enabled: Yes
Port-forwarding (ipv4)
nfs udp 1:udp:[10.232.20.175]:111:[10.0.2.4]:111
nfs udp 2:udp:[10.232.20.175]:2049:[10.0.2.4]:2049
ssh:tcp:[10.232.20.175]:22:[10.0.2.4]:22
webmin:tcp:[10.232.20.175]:10000:[10.0.2.4]:10000
loopback mappings (ipv4)
127.0.0.1=2Re: Port Forwarding tcp/udp conflict
Posted: 25. Aug 2015, 14:33
This is the "bug" from the 1st postMartin wrote:It seems that VirtualBox doesn't allow port forwarding for both TCP and UDP between the same IP address and ports.
I just tried to configure this combination myself and got the same error message.
Re: Port Forwarding tcp/udp conflict
Posted: 25. Aug 2015, 14:44
I would try it again and this time leave the host address empty. This really should not be needed.
- portforward-tcp-udp.png (21.3 KiB) Viewed 4118 times
Re: Port Forwarding tcp/udp conflict
Posted: 25. Aug 2015, 14:51
You can enter the rules, but you get the error message as soon as click the OK button.
Re: Port Forwarding tcp/udp conflict
Posted: 25. Aug 2015, 14:54
Same error under Win7/32 host.
Re: Port Forwarding tcp/udp conflict
Posted: 25. Aug 2015, 15:01
Well Martin I would not have posted that if it had failed for me as well.
If I had the host IP, it did fail. Removing that allowed it to proceed as it should. If you check the actual VBoxManage command it does not list the host IP in the syntax.
VBoxManage modifyvm "VM name" --natpf1 "guestssh,tcp,,2222,,22"
Now here's the rub. There is NAT and NATnetworking. If you create a new NATnetwork you can not use the same address scheme as NAT. The OP seems to be using NATnetworking with the address scheme of NAT. Still don't have enough direct information to prove that though.
If I had the host IP, it did fail. Removing that allowed it to proceed as it should. If you check the actual VBoxManage command it does not list the host IP in the syntax.
VBoxManage modifyvm "VM name" --natpf1 "guestssh,tcp,,2222,,22"
Now here's the rub. There is NAT and NATnetworking. If you create a new NATnetwork you can not use the same address scheme as NAT. The OP seems to be using NATnetworking with the address scheme of NAT. Still don't have enough direct information to prove that though.
Re: Port Forwarding tcp/udp conflict
Posted: 25. Aug 2015, 15:03
OK look in the network section and see if you have NAT listed to be able to choose from.
Note: I don't need to see a new screenshot showing the same failure.
Note: I don't need to see a new screenshot showing the same failure.
Re: Port Forwarding tcp/udp conflict
Posted: 25. Aug 2015, 15:15
I tried exactly the same config as in your screenshot on a new NatNetwork and got the error messagePerryg wrote:Well Martin I would not have posted that if it had failed for me as well.
Vbox 5.0.2 r102096 on RHEL 6.6