SSH acting up after updates

Here's my problem: We've got a network of 5 macs and 1 linux server. I could manage all computers via ssh with no problem, no matter what machine I sat at ... that's the beauty of ssh
However, after some recent updates ssh doesn't work or connect reeeally slowly. When I finally do get a password prompt and enter the password, the connection has been closed by he other side (timeout occured).
Here's some output. I've tried adding 10.1.1.100 to /etc/hosts and gave it a host name, but that didn't really work either. Neither did adding 'GSSApiKeyExchange no' on the server side.
Apple claims they don't support 'ssh' ... figures.
Does anyone else have a clue what's going on?
ssh -vvv [email protected]
OpenSSH_4.5p1, OpenSSL 0.9.7l 28 Sep 2006
debug1: Reading configuration data /etc/ssh_config
debug2: ssh_connect: needpriv 0
debug1: Connecting to 10.1.1.100 [10.1.1.100] port 22.
debug1: Connection established.
debug1: identity file /Users/florianneuhauser/.ssh/identity type -1
debug1: identity file /Users/florianneuhauser/.ssh/id_rsa type -1
debug1: identity file /Users/florianneuhauser/.ssh/id_dsa type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_4.3
debug1: match: OpenSSH_4.3 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.5
debug2: fd 3 setting O_NONBLOCK
debug1: An invalid name was supplied
Cannot determine realm for numeric host address
debug1: An invalid name was supplied
Cannot determine realm for numeric host address
debug1: SSH2MSGKEXINIT sent
debug1: SSH2MSGKEXINIT received
debug2: kexparsekexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie- hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kexparsekexinit: ssh-rsa,ssh-dss
debug2: kexparsekexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes1 92-cbc,aes256-cbc,[email protected],aes128-ctr,aes192-ctr,aes256-ctr
debug2: kexparsekexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes1 92-cbc,aes256-cbc,[email protected],aes128-ctr,aes192-ctr,aes256-ctr
debug2: kexparsekexinit: hmac-md5,hmac-sha1,hmac-ripemd160,[email protected],hmac-sha1-96,hmac- md5-96
debug2: kexparsekexinit: hmac-md5,hmac-sha1,hmac-ripemd160,[email protected],hmac-sha1-96,hmac- md5-96
debug2: kexparsekexinit: none,[email protected],zlib
debug2: kexparsekexinit: none,[email protected],zlib
debug2: kexparsekexinit:
debug2: kexparsekexinit:
debug2: kexparsekexinit: firstkexfollows 0
debug2: kexparsekexinit: reserved 0
debug2: kexparsekexinit: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-g roup1-sha1
debug2: kexparsekexinit: ssh-rsa,ssh-dss
debug2: kexparsekexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes1 92-cbc,aes256-cbc,[email protected],aes128-ctr,aes192-ctr,aes256-ctr
debug2: kexparsekexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes1 92-cbc,aes256-cbc,[email protected],aes128-ctr,aes192-ctr,aes256-ctr
debug2: kexparsekexinit: hmac-md5,hmac-sha1,hmac-ripemd160,[email protected],hmac-sha1-96,hmac- md5-96
debug2: kexparsekexinit: hmac-md5,hmac-sha1,hmac-ripemd160,[email protected],hmac-sha1-96,hmac- md5-96
debug2: kexparsekexinit: none,[email protected]
debug2: kexparsekexinit: none,[email protected]
debug2: kexparsekexinit:
debug2: kexparsekexinit:
debug2: kexparsekexinit: firstkexfollows 0
debug2: kexparsekexinit: reserved 0
debug2: mac_init: found hmac-md5
debug1: kex: server->client aes128-cbc hmac-md5 none
debug2: mac_init: found hmac-md5
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2MSG_KEX_DH_GEXREQUEST(1024<1024<8192) sent
debug1: expecting SSH2MSG_KEX_DH_GEXGROUP
debug2: dhgenkey: priv key bits set: 114/256
debug2: bits set: 514/1024
debug1: SSH2MSG_KEX_DH_GEXINIT sent
debug1: expecting SSH2MSG_KEX_DH_GEXREPLY
debug3: checkhost_inhostfile: filename /Users/florianneuhauser/.ssh/known_hosts
debug3: checkhost_inhostfile: match line 2
debug1: Host '10.1.1.100' is known and matches the RSA host key.
debug1: Found key in /Users/florianneuhauser/.ssh/known_hosts:2
debug2: bits set: 505/1024
debug1: sshrsaverify: signature correct
debug2: kexderivekeys
debug2: set_newkeys: mode 1
debug1: SSH2MSGNEWKEYS sent
debug1: expecting SSH2MSGNEWKEYS
debug2: set_newkeys: mode 0
debug1: SSH2MSGNEWKEYS received
debug1: SSH2MSG_SERVICEREQUEST sent
debug2: service_accept: ssh-userauth
debug1: SSH2MSG_SERVICEACCEPT received
debug2: key: /Users/florianneuhauser/.ssh/identity (0x0)
debug2: key: /Users/florianneuhauser/.ssh/id_rsa (0x0)
debug2: key: /Users/florianneuhauser/.ssh/id_dsa (0x0)
debug1: Authentications that can continue: publickey,gssapi-with-mic,password
debug3: start over, passed a different list publickey,gssapi-with-mic,password
debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_lookup gssapi-with-mic
debug3: remaining preferred: publickey,keyboard-interactive,password
debug3: authmethodisenabled gssapi-with-mic
debug1: Next authentication method: gssapi-with-mic
debug1: An invalid name was supplied
Cannot determine realm for numeric host address
debug1: An invalid name was supplied
Cannot determine realm for numeric host address
debug2: we did not send a packet, disable method
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethodisenabled publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /Users/florianneuhauser/.ssh/identity
debug3: no such identity: /Users/florianneuhauser/.ssh/identity
debug1: Trying private key: /Users/florianneuhauser/.ssh/id_rsa
debug3: no such identity: /Users/florianneuhauser/.ssh/id_rsa
debug1: Trying private key: /Users/florianneuhauser/.ssh/id_dsa
debug3: no such identity: /Users/florianneuhauser/.ssh/id_dsa
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethodisenabled password
debug1: Next authentication method: password

I just had a problem with this myself. My ssh was working fine for years till a week or two ago, then I couldn't connect to anything. Here's what fixed it for me.
You need to edit (create if necessary) ~/.ssh/config on the machine you're connecting from and add the line
GSSAPIKeyExchange no
Your post said you tried that on the server side, I had to use it on the client side & it appears to work. You can test it first by using the -o switch at the command line, e.g.
ssh -x -o GSSAPIKeyExchange=no 192.x.x.x
Hope that helps.

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