| 1 |
On Saturday 11 Jan 2014 09:03:16 the wrote: |
| 2 |
|
| 3 |
> Also |
| 4 |
> "Besides MTU, there is yet another way to set the maximum packet size, |
| 5 |
> the so called Maximum Segment Size. This is a field in the TCP Options |
| 6 |
> part of a SYN packet." |
| 7 |
> |
| 8 |
> Does this mean that even with this iptables rule I'll have problems |
| 9 |
> with udp packets? |
| 10 |
|
| 11 |
If you are using VPN with UDP encapsulation then yes, I would expect that you |
| 12 |
could have problems with some endpoint routers. That's why I suggested to set |
| 13 |
the MTU at your interface to a smaller size. That should apply at any |
| 14 |
protocol that is going out of the given interface, including UDP. |
| 15 |
|
| 16 |
I was trying to connect to a VPN gateway once on a router that used PPPoE to |
| 17 |
authenticate with the ISP's ADSL service. Although it would connect to the |
| 18 |
gateway - I couldn't use the tunnel which was just hanging there doing nothing |
| 19 |
(black hole symptom). This did my head in, until I reduced the MTU using |
| 20 |
ifconfig and the problem was immediately resolved. |
| 21 |
|
| 22 |
-- |
| 23 |
Regards, |
| 24 |
Mick |
Archives