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Lemma
Guru
Joined: 19 Apr 2002
Posts: 416
Location: Uppsala, Sweden
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 Posted: Mon Feb 03, 2003 5:14 pm Post subject: ssh fast in one direction, not the other... |
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I have a problem with using ssh (or any other connection) to and from my router. I think it has to do with resolving adresses cause - if I scp a file from my router to my other computer, all is well (fast and fine), but if I try to transfer the same file back again to the router, it is slow as hell! My hosts file look like:
laptop;
| Code: | 127.0.0.1 localhost
192.168.0.1 gateway.small.net gateway
192.168.0.2 bertil.small.net bertil
130.238.236.220 kemi220.kemi.uu.se kemi220 |
and router;
| Code: | 127.0.0.1 localhost
130.238.236.1 kemi220.kemi.uu.se kemi220
192.168.0.1 gateway.small.net gateway
192.168.0.2 bertil.small.net bertil |
I think the problem has to do with the fact that the router has two names, gateway.small.net internally and kemi220.kemi.uu.se extarnally. In hostname I have put kemi220.kemi.uu.se only as I can't see how to bind one name to eth0 and another name to eth1. This is frustrating! ! !
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Always make it as simple as possible, but no simpler
/Einstein |
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Sven Vermeulen
Retired Dev
Joined: 29 Aug 2002
Posts: 1345
Location: Mechelen, Belgium
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| Posted: Mon Feb 03, 2003 6:35 pm Post subject: |
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Where is the slowdown? During the whole process (i.e. speed of transfer) or at the beginning (connection)? If it is the latter, then the problem is probably ip-resolving. If it is the first, then your suggested difficulty isn't the cause.
Are both pc's using the same sshd_config settings? Do you use the same ssh-options on both hosts? |
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Lemma
Guru
Joined: 19 Apr 2002
Posts: 416
Location: Uppsala, Sweden
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| Posted: Mon Feb 03, 2003 6:58 pm Post subject: |
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| Quote: | | Are both pc's using the same sshd_config settings? Do you use the same ssh-options on both hosts? |
Yes, the ssh-options are the same (gentoo-default). As for the sshd_config, I only have it installed on the router so all the transfers are executed from the laptop, no matter if the direction of the transfer. | Quote: | | Where is the slowdown? During the whole process (i.e. speed of transfer) or at the beginning (connection)? If it is the latter, then the problem is probably ip-resolving. If it is the first, then your suggested difficulty isn't the cause. |
The slowdown starts right away and the transfer is stopped (stalled) at 196kb - if I wait a while it start again only to stall a few 100kb later. This goes on for the whole transfer. I also affect sending email through the router but not reciving.
BTW, sitting at home using it's "official" ip, makes it possible to transfer with the speed I should be able to get directly connected at work (so over two firewalls and at least as many NAT:s the transfer is some 15 times faster  ); using that same ip-adress at work gives no speed up...
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/Einstein |
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