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Old 05-01-2014, 04:49 PM   #1
houzi
LQ Newbie
 
Registered: Jun 2012
Posts: 10

Rep: Reputation: Disabled
Can ssh over link, but scp stalls and port:443 cannot find a common cipher.


The route in question: Ethernet cable - Slackware 14.1 workstation (192.168.1.130) - Slackware 14 home server (192.168.1.117). Via my ASUS RT-N16 running some build of TomatoUSB firmware which has been rock solid since I set it up three years ago.

All of a sudden, scp completely stalls on me, no matter how small files I want to copy, or how small I set the frame size to be for the scp session. This has never happened before and everything has been rock solid until this started in the midst of my assignment season a.k.a semester.

Restarting rc.inet1 seems to improve the matter slightly as the stalling will occur, but not as bad as a complete halt. All the other nodes on my network can scp to both my workstation and server just fine. It's just the route between these two nodes.

Another annoying problem is that I cannot get an ssl connection from my workstation to an owncloud instance on my server. All other nodes connect just fine. I've tried these browsers: Firefox, Chromium and Konqueror. On Firefox I get this error: "Cannot communicate securely with peer: no common encryption algorithm(s). (Error code: ssl_error_no_cypher_overlap)"

I have done tons of searching, but haven't found anything helpful. I have tried to reinstall mozilla-nss and openssl packages on my workstation, which hasn't helped at all.

ifconfig:
Code:
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 9000
        inet 192.168.1.117  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::f66d:4ff:fe75:335  prefixlen 64  scopeid 0x20<link>
        ether f4:6d:04:75:03:35  txqueuelen 1000  (Ethernet)
        RX packets 58668863  bytes 42350131194 (39.4 GiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 83073288  bytes 112278422638 (104.5 GiB)
        TX errors 0  dropped 6394 overruns 0  carrier 0  collisions 0
        device interrupt 55  base 0xa000

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 16436
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 0  (Local Loopback)
        RX packets 16941  bytes 1083100 (1.0 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 16941  bytes 1083100 (1.0 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 9000
        inet 192.168.1.130  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::f66d:4ff:fe97:c2e5  prefixlen 64  scopeid 0x20<link>
        ether f4:6d:04:97:c2:e5  txqueuelen 1000  (Ethernet)
        RX packets 23834105  bytes 35657804190 (33.2 GiB)
        RX errors 0  dropped 567  overruns 0  frame 0
        TX packets 13082052  bytes 1095197981 (1.0 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 18  memory 0xfb500000-fb520000

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 0  (Local Loopback)
        RX packets 296842  bytes 43398357 (41.3 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 296842  bytes 43398357 (41.3 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
ethtool:
Code:
(192.168.1.130 - workstation)
Settings for eth0:
        Supported ports: [ TP ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Supported pause frame use: No
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Advertised pause frame use: No
        Advertised auto-negotiation: Yes
        Speed: 1000Mb/s
        Duplex: Full
        Port: Twisted Pair
        PHYAD: 2
        Transceiver: internal
        Auto-negotiation: on
        MDI-X: on (auto)
        Supports Wake-on: pumbg
        Wake-on: g
        Current message level: 0x00000007 (7)
                               drv probe link
        Link detected: yes

(192.168.1.117 - server)
Settings for eth0:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Half 1000baseT/Full
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Half 1000baseT/Full
        Advertised pause frame use: Symmetric Receive-only
        Advertised auto-negotiation: Yes
        Link partner advertised link modes:  10baseT/Half 10baseT/Full
                                             100baseT/Half 100baseT/Full
        Link partner advertised pause frame use: Symmetric Receive-only
        Link partner advertised auto-negotiation: Yes
        Speed: 100Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: pumbg
        Wake-on: g
        Current message level: 0x00000033 (51)
                               drv probe ifdown ifup
        Link detected: yes

Any help I can get is greatly appreciated, as I have no more clues as to what I can do to resolve the problems.
 
Old 05-01-2014, 05:12 PM   #2
szboardstretcher
Senior Member
 
Registered: Aug 2006
Location: Detroit, MI
Distribution: GNU/Linux systemd
Posts: 4,278

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I'm not familiar with slackware, but what you are describing is a common problem in Centos after updates go awry. You have probably gotten an openssl/openssh program or library update that is incompatible with the other machine or vice versa.

If you back out the updates to a common version you should be ok. Or you can roll back the update in question (you can do this with centos, unsure about slackware)

To be sure that you are not having network problems you can use a bootable usb stick with arch on it or some other distro on both computers and try ssh/scp to see if they work without fail. If they do, you know that it is not the network, and is simply an update to the OS that went badly and you can work the problem from there.
 
1 members found this post helpful.
Old 05-01-2014, 05:15 PM   #3
houzi
LQ Newbie
 
Registered: Jun 2012
Posts: 10

Original Poster
Rep: Reputation: Disabled
Thank you for that idea. I'll try booting my workstation with a live usb.
 
  


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