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On 27 Nov 2007, at 10:19, Mick wrote: |
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> Hi All, |
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> |
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> I have noticed this problem when I try to connect to two different |
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> machines in |
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> two different continents. One is on cable (US) the other on ISDN ADSL |
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> (Greece). In the evening and sometimes weekends ssh connections |
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> from my |
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> laptop to these two PCs are either taking ages or time out. This is |
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> ssh |
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> connections to sshd which is listening to random ports in the 200+ |
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> or 12000+ |
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> ranges. If I eventually manage to connect the latency is ridiculous |
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> - up to |
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> 5 seconds! Sometimes I enter a passwd, if I can get that far and |
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> then wait |
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> for hours with no response. Eventually, I have to close the terminal. |
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> |
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> Tracerouting does not get through although some clever tcptraceroute |
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> strings |
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> may on occasions (intermittently) get through. |
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> |
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> Both servers run on domestic networks. BTW, ssh-ing to servers in |
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> datacenters |
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> with their big fiber-optic pipes, although relatively slow in peak |
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> times, |
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> always gets through. |
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> |
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> The strange thing is that there is no problem talking to these boxen |
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> while |
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> they run Google-Talk, it's only the ssh connection that seems to |
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> suffer. |
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> |
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> Have you come across such a problem before? How can I troubleshoot |
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> it? In |
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> this day and age of broadband connections it seems strange to get |
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> worse |
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> performance than on a dialup network . . . I mean I have run VNC |
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> connections |
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> over a 56k dial up with more responsiveness than this! |
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> -- |
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> Regards, |
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> Mick |
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|
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I've run across the same kind of issues on certain ISPs when using non- |
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standard ports for sshd. Given other connections (Gtalk) are working, |
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the first thing I would try in your position is to see if there is a |
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difference when using 22 versus your random port. With certain ISPs in |
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the UK I've found SSH connections to be unusable on anything but the |
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default port. Of course it has everything to do with the "smart" |
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traffic shaping at the ISP and there was nothing I could do about it. |
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-- |
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Christopher |
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-- |
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gentoo-user@g.o mailing list |
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