Alvin
We seem to be having two different problems.
Mine was due to the local machine's MTU setting and was fixed when the
MTU was brought down to 1500. My specific issue here was that Ekiga
could very well work with the local machine's MTU set to 7000 as it's
called *Maximum* Transmission Unit not *Only* Transmission Unit. As
evidenced in my test cases, a computer can receive packets smaller than
its MTU setting with no problem. That's why conversation went one way
in one of my test cases - Ekiga was receiving 1500-byte (or smaller)
packets but sending out 7000-byte packets and the packets where being
dropped (too large) once they hit the public Internet.
However, you seem to be saying that no matter what you do, you can't get
the Ekiga Echo Test to work. Please reply and verify:
* that your MTU setting is 1500 in the output that ifconfig gives you.
Look for the MTU in the 4th line.
Example:
eth0 Link encap:Ethernet HWaddr 00:17:31:3b:d0:ee
inet addr:192.168.1.101 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::217:31ff:fe3b:d0ee/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
* that you still can't connection when the only codec you tell Ekiga to use is
GSM
When I got this working, I swear this was the protocol Ekiga said it was
using. I have to go by memory on this one, because it seems that the
Ekiga registration server is down at the moment. (Both my desktop and
netbook fail Ekiga registration with "MonSock UDP Port on remote not
ready." in the debug output.)
* try an MTU of 1400.
While 1500 is the standard, some hops on the net are less. If your ISP
is one of those hops, you'll never get 1500-byte UDP packets out to the
Internet.
>From http://kb.netgear.com/app/answers/detail/a_id/1153 :
# 1500. The largest Ethernet packet size; it is also the default value. This is
the typical setting for non-PPPoE, non-VPN connections.
# 1492. The size PPPoE prefers.
# 1472. Maximum size to use for pinging. (Bigger packets are fragmented.)
# 1468. The size DHCP prefers.
# 1460. Usable by AOL if you don't have large email attachments, etc.
# 1430. The size VPN and PPTP prefer.
# 1400. Maximum size for AOL DSL.
If you still can't connect, I think this might be another bug and it'd
be best to file another one for it.
--
Ubuntu 9.04 Ekiga 3.2.0 Obeys Local Machine MTU Settings, Tries Nothing Else
https://bugs.launchpad.net/bugs/380091
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