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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 from my |
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> laptop to these two PCs are either taking ages or time out. This is ssh |
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> connections to sshd which is listening to random ports in the 200+ or |
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> 12000+ |
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> ranges. If I eventually manage to connect the latency is ridiculous - up |
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> to |
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> 5 seconds! Sometimes I enter a passwd, if I can get that far and then |
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> 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 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 while |
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> they run Google-Talk, it's only the ssh connection that seems to suffer. |
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> |
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> Have you come across such a problem before? How can I troubleshoot it? |
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> In |
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> this day and age of broadband connections it seems strange to get 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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|
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Hi Mick, |
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|
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I have noticed these problems myself as well sometimes when connecting to |
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a server connected to ADSL in the UK (I am currently in NL myself) |
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|
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Fortunately for me, I have full access to the ADSL-router from that server |
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when I can connect and I found it usually coincides with connection |
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problems between the router and the ISP. |
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|
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Can you (or someone else) check if there are any problems with this? |
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|
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Another cause could be that the ISP (you did mention these are domestic |
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networks) is throttling/blocking certain ports/services/connection types. |
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I have heard of ISPs in NL and Belgium (not sure if it's true) that tend |
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to change these policies depending on the time of day. |
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|
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This could also be done by your ISP. |
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Are the SSH-ports of the servers in DataCenters on 22 (default) or in the |
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higher 200+ and 12000+ range? |
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|
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Kind regards, |
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|
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Joost Roeleveld |
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|
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-- |
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