Hello,
I often use telnet to connect to (embedded) devices on a local network,
devices which do not support ssh. On both Debian and Gentoo systems I
just delete the default route out and set a second (sub)interface on
the ethernet port like this:
The default setting is obtained from the /etc/conf.d/net file:
iface_eth0="192.168.2.23 broadcast 192.168.2.255 netmask 255.255.255.0"
So I use these commands to set up an additional interface that
matches the defauld class C (/24) network that the device manufacturer
sets as a default. For example a device might be given 192.168.15.1:
route delete default
ifconfig eth0:0 inet 192.168.15.23 netmask 255.255.255.0 broadcast
192.168.15.255
ifconfig yeilds:
eth0 Link encap:Ethernet HWaddr 00:90:F5:2B:CB:13
inet addr:192.168.2.23 Bcast:192.168.2.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:590024 errors:0 dropped:0 overruns:0 frame:0
TX packets:80894 errors:0 dropped:0 overruns:0 carrier:0
collisions:4089 txqueuelen:1000
RX bytes:153811888 (146.6 Mb) TX bytes:5882603 (5.6 Mb)
Interrupt:11 Base address:0x2000
eth0:0 Link encap:Ethernet HWaddr 00:90:F5:2B:CB:13
inet addr:192.168.15.23 Bcast:192.168.15.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:590024 errors:0 dropped:0 overruns:0 frame:0
TX packets:80894 errors:0 dropped:0 overruns:0 carrier:0
collisions:4089 txqueuelen:1000
RX bytes:153811888 (146.6 Mb) TX bytes:5882603 (5.6 Mb)
Interrupt:11 Base address:0x2000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:2673 errors:0 dropped:0 overruns:0 frame:0
TX packets:2673 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:269579 (263.2 Kb) TX bytes:269579 (263.2 Kb)
My actual question may or may not be related to the use of a sub interface.
When I telnet into the devices from a similarly setup Debian system, I get
a very fast response. When I telnet into the devices from a gentoo system,
it takes 30-50s (estimate) for the login prompt response. It's almost as
those telnet is set up to use ssh, but times out and then defaults to
real telnet?
1. If this is not what's happening, what is to cause telnet to react so
slowly?
2. Regardless of what's happening, how to I fix? When I use telnet, I
want telnet, nice and fast, not ssh or any other protocol.
Ideas on how to fix telnet on Gentoo?
James
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