network unreachable..???

[mark.M]

I installed rp3410(11v1) server.
Network connection is normalcy after server Booting.
but, If some minute passes, network connection expires.

"Trying...
telnet : unable to connect to remote host :
network is unreachable "
Perhaps, is there person who know reason?
If network connection does not become from first, it doubts composition files Several times is normal and do not try after TELNET some minute after Booting.

why?????

[Joseph Loo · Accepted solution]

hi,

could be a network (or network cable) problem or maybe firewall or even some file systems may be full. there r just too many possiblities.

u may first like to access the server via the console rather than remote. run dmesg command to assess if there r any issue with the server, check if it able to ping to other servers (within firewall limits, if any).


regards.

[Suraj Singh_1]

Hi,

What all daemons did you try connecting to? Does the network connection fails to connect to all the daemons?

When telnet fails, did you try pinging the host? Does the ping succeed?

I experienced a similar problem few years back where initially were able to access the webserver, but in few minutes they would get page not found error, and after a lot of digging we found out that it was a badly configured firewall. The allowed client ports was set to 1204 to 65535, whereas it should've been 1024 to 65535.

Note the difference 1204-1024 = 180. So the firewall was blocking first 180 ports also!!

Suraj

[Nicolas_17]

When you get this message:

"Trying...
telnet : unable to connect to remote host :
network is unreachable "

...are you trying to connect TO the rp3410 from a client machine, or FROM the rp3410 to another host?

The "network is unreachable" usually refers to routing problems. Perhaps the traffic is reaching the host but not coming back because a default gateway is missing.

Nicolas.

[mark.M]

Thank at very reply
I solved this problem as follows.
when have firewall...

#vi nddonf
TRANSPORT_NAME[0]=ip
NDD_NAME[0]=ip_ire_gw_probe
NDD_VALUE[0]=0