Re: OT: Telenet to terminal server dropping -ubuntu 10 driving

I have this same issue.
After about an hour or two (it varies), my session just locks up and I have
to reconnect.

I don't believe this is a timeout issue.

On Sun, Jan 23, 2011 at 7:13 PM, Narbik Kocharians <narbikk_at_gmail.com>wrote:

> Is your session dropping after some inactivity time? Or is it
> dropping/hanging while you are working on it.
>
> On Sun, Jan 23, 2011 at 5:59 AM, Radioactive Frog <pbhatkoti_at_gmail.com
> >wrote:
>
> > yes, same issue with Cisco IPS :) its linux and i have another linux VM,
> > same issue :(
> >
> > I have plugged in the wired connection so far so good...
> >
> > On Mon, Jan 24, 2011 at 12:43 AM, Carlos G Mendioroz <tron_at_huapi.net.ar
> > >wrote:
> >
> > > If the problem follows the "originating" port, then your laptop
> > > is triggering the issue, but not necessarily being the culprit :)
> > >
> > > If the other router is the same brand, then it could have the same
> > > issue. That was why I was asking for another telnet server (i.e. not
> > > a (cisco ?) router/switch.
> > >
> > > -Carlos
> > >
> > > Radioactive Frog @ 23/01/2011 10:19 -0300 dixit:
> > >
> > >> Thanks carlos,
> > >> yes I do have another router and when i telnet to that router from my
> > >> laptop it doesn't work either.
> > >>
> > >> however, http to the same terminal server works! just telnet would
> hung
> > >> just like that.
> > >>
> > >> I have another laptop#2. telnet from laptop#2 works fine for both TS
> and
> > >> Router#2.
> > >> it's the just my this laptop#1 having issue with WIFI.
> > >>
> > >> I guess, I may try with wired LAN connection for a few hours and then
> > see
> > >> if it works.
> > >> If it works via wired interface then it's just the WLAN chipset &
> driver
> > >> issue.
> > >> It will narrow down the issue :). will do it tomorrow and will update
> > >> everyone
> > >>
> > >> FROG
> > >>
> > >>
> > >> On Sun, Jan 23, 2011 at 10:34 PM, Carlos G Mendioroz <
> tron_at_huapi.net.ar
> > <mailto:
> > >> tron_at_huapi.net.ar>> wrote:
> > >>
> > >> Weird. I've seen, a long time ago, some crappy server that would
> > >> hang when the connected port was over 32k. Reason was that it was
> > >> being treated as a signed short and would not like negative
> > >> port numbers.
> > >>
> > >> That may be consistent with this happening after a while of
> working.
> > >> OS may start with low port numbers and start climbing.
> > >>
> > >> On the other hand, I would try to single the culprit. Do you have
> > >> some ohter telnet server to try ?
> > >>
> > >> -Carlos
> > >>
> > >> Radioactive Frog @ 22/01/2011 22:08 -0300 dixit:
> > >>
> > >> Has anyone seen this telnet issue?
> > >> I am connected to my 2511 terminal server using telnet from my
> > >> laptop. It
> > >> will work for something 2 or 3 hours (not timed) perfectly.
> > >> then all of sudden ping from my laptop to Terminal server still
> > >> works but
> > >> all my telnet windows hung , see below .
> > >>
> > >>
> > >> DSL/WIFI-RTR------wifi----LAPTOP
> > >> |
> > >> |-----10/100 LANwire--------Terminal Server---to lab gears
> > >>
> > >> both laptop and terminal servers are in the same subnet no
> > >> firewall in
> > >> between etc. other PC from my WLAN can telnet okay, its just
> the
> > >> my laptop.
> > >>
> > >> Radioactive_at_frog ~/Desktop $ telnet 50.1.3.2
> > >> Trying 50.1.3.2...
> > >> Connected to 50.1.3.2.
> > >> Escape character is '^]'.
> > >>
> > >>
> > >> At the same time I have another router which I telnet from my
> > >> laptop shows
> > >> the same issue "escape character blah" and nothing happens
> after
> > >> that. I
> > >> dont get to put user/pass.
> > >>
> > >> So it's just not the terminal server.
> > >>
> > >> Tried a little bit digging on it and the fix was "enable"
> disable
> > >> my
> > >> wireless connection. i.e. on my IBM R61p press Fn key + F5.
> > >> I can telnet after that and access lab normally.
> > >>
> > >> resetting TCP stack --> /etc/init.d/networking restart didn't
> > >> fix it.
> > >>
> > >> No firewall configured on this. So I was wondering
> > >>
> > >>
> > >>
> > >> frog Desktop # tcpdump -ni wlan0 | grep 50.1.3
> > >> tcpdump: verbose output suppressed, use -v or -vv for full
> > >> protocol decode
> > >> listening on wlan0, link-type EN10MB (Ethernet), capture size
> > >> 65535 bytes
> > >>
> > >> 12:00:54.313282 IP 50.1.3.15.53851 > 50.1.3.2.23: Flags [P.],
> seq
> > >> 2208563960:2208563987, ack 1599023550, win 5840, length 27
> > >> 12:00:55.982996 IP 50.1.3.15.60803 > 50.1.3.2.23: Flags [S],
> seq
> > >> 382968090,
> > >> win 5840, options [mss 1460,sackOK,TS val 4156193 ecr
> > >> 0,nop,wscale 6],
> > >> length 0
> > >> 12:00:56.004516 IP 50.1.3.2.23 > 50.1.3.15.60803: Flags [S.],
> seq
> > >> 3537695090, ack 382968091, win 4128, options [mss 1460], length
> 0
> > >> 12:00:56.004551 IP 50.1.3.15.60803 > 50.1.3.2.23: Flags [.],
> ack
> > >> 1, win
> > >> 5840, length 0
> > >> 12:00:56.004675 IP 50.1.3.15.60803 > 50.1.3.2.23: Flags [P.],
> > >> seq 1:28, ack
> > >> 1, win 5840, length 27
> > >> 12:00:56.213642 IP 50.1.3.2.23 > 50.1.3.15.60803: Flags [.],
> ack
> > >> 28, win
> > >> 4101, length 0
> > >>
> > >> .15 = my laptop IP
> > >> .2 = Terminal srv IP
> > >>
> > >> see above tcpdump , laptop (.15) keep sending ack but never get
> > >> syn.
> > >>
> > >> It's just my lapotp that is playing up. SSH works but not the
> > >> telnet.
> > >>
> > >>
> > >> Anyone have seen above?
> > >> I have upgraded kernel to the latest but still seeing this
> > >> happening. I can
> > >> access everything else but not the telnet.
> > >> i can access the internet etc okay on my laptop. ssh to other
> > >> switch in the
> > >> same subnet is okay. changed the cable.
> > >>
> > >>
> > >> Blogs and organic groups at http://www.ccie.net
> > >>
> > >>
> > >>
> _______________________________________________________________________
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> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >> -- Carlos G Mendioroz <tron_at_huapi.ba.ar <mailto:
> > tron_at_huapi.ba.ar
> > >> >>
> > >> LW7 EQI Argentina
> > >>
> > >>
> > >>
> > > --
> > > Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
> >
> >
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> >
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> >
> >
> >
> >
> >
> >
> >
> >
>
>
> --
> *Narbik Kocharians
> *CCSI#30832, CCIE# 12410 (R&S, SP, Security)
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Received on Sun Jan 23 2011 - 19:42:04 ART