'Connection reset by peer' in PuTTY since version 0.58

Hi everybody,

I'm using PuTTY to connect via SSH to my home router (a Siemens
Gigaset SE515).
It reports SSH-2.0-dropbear_0.36 as server.
The connection worked fine up to PuTTY 0.57.
Since PuTTY 0.58, the connection is reset by the server before
authentication.
PuTTY settings and session data are the same in both cases.

I'm no expert in SSH. Can anyone give a hint if this is a bug in
PuTTY, in the server or a configuration problem?

Here are the logs for both connection attempts:

=~=~=~=~=~=~=~=~=~=~=~= PuTTY log 2007.04.21 10:18:13
=~=~=~=~=~=~=~=~=~=~=~=
Event Log: Writing new session log (SSH packets mode) to file: T:
\putty-057.log
Event Log: Looking up host "se515.home"
Event Log: Connecting to 192.168.1.1 port 22
Event Log: Server version: SSH-2.0-dropbear_0.36
Event Log: We claim version: SSH-2.0-PuTTY-Release-0.57
Event Log: Using SSH protocol version 2
Incoming packet type 20 / 0x14 (SSH2_MSG_KEXINIT)
00000000 a8 a6 f2 5c 92 66 cb ae 12 d3 60 5a 23 56 36 ed ...
\.f....`Z#V6.
00000010 00 00 00 1a 64 69 66 66 69 65 2d 68 65 6c 6c
6d ....diffie-hellm
00000020 61 6e 2d 67 72 6f 75 70 31 2d 73 68 61 31 00 00 an-group1-
sha1..
00000030 00 07 73 73 68 2d 72 73 61 00 00 00 08 33 64 65 ..ssh-
rsa....3de
00000040 73 2d 63 62 63 00 00 00 08 33 64 65 73 2d 63 62 s-cbc....
3des-cb
00000050 63 00 00 00 12 68 6d 61 63 2d 73 68 61 31 2c 68 c....hmac-
sha1,h
00000060 6d 61 63 2d 6d 64 35 00 00 00 12 68 6d 61 63 2d mac-
md5....hmac-
00000070 73 68 61 31 2c 68 6d 61 63 2d 6d 64 35 00 00 00 sha1,hmac-
md5...
00000080 04 6e 6f 6e 65 00 00 00 04 6e 6f 6e 65 00 00
00 .none....none...
00000090 00 00 00 00 00 00 00 00 00
00 ..........
Outgoing packet type 20 / 0x14 (SSH2_MSG_KEXINIT)
00000000 b5 4c a1 29 97 d5 c2 0c 0a 21 88 7e 5e 9d 54
c0 .L.).....!.~^.T.
00000010 00 00 00 3d 64 69 66 66 69 65 2d 68 65 6c 6c
6d ...=diffie-hellm
00000020 61 6e 2d 67 72 6f 75 70 2d 65 78 63 68 61 6e 67 an-group-
exchang
00000030 65 2d 73 68 61 31 2c 64 69 66 66 69 65 2d 68 65 e-
sha1,diffie-he
00000040 6c 6c 6d 61 6e 2d 67 72 6f 75 70 31 2d 73 68 61 llman-
group1-sha
00000050 31 00 00 00 0f 73 73 68 2d 72 73 61 2c 73 73 68 1....ssh-
rsa,ssh
00000060 2d 64 73 73 00 00 00 82 61 65 73 32 35 36 2d 63 -
dss....aes256-c
00000070 62 63 2c 72 69 6a 6e 64 61 65 6c 32 35 36 2d 63
bc,rijndael256-c
00000080 62 63 2c 72 69 6a 6e 64 61 65 6c 2d 63 62 63 40
bc,rijndael-cbc@
00000090 6c 79 73 61 74 6f 72 2e 6c 69 75 2e 73 65 2c 61
lysator.liu.se,a
000000a0 65 73 31 39 32 2d 63 62 63 2c 72 69 6a 6e 64 61 es192-
cbc,rijnda
000000b0 65 6c 31 39 32 2d 63 62 63 2c 61 65 73 31 32 38 el192-
cbc,aes128
000000c0 2d 63 62 63 2c 72 69 6a 6e 64 61 65 6c 31 32 38 -
cbc,rijndael128
000000d0 2d 63 62 63 2c 62 6c 6f 77 66 69 73 68 2d 63 62 -
cbc,blowfish-cb
000000e0 63 2c 33 64 65 73 2d 63 62 63 00 00 00 82 61 65 c,3des-
cbc....ae
000000f0 73 32 35 36 2d 63 62 63 2c 72 69 6a 6e 64 61 65 s256-
cbc,rijndae
00000100 6c 32 35 36 2d 63 62 63 2c 72 69 6a 6e 64 61 65 l256-
cbc,rijndae
00000110 6c 2d 63 62 63 40 6c 79 73 61 74 6f 72 2e 6c 69 l-
cbc@xxxxxxxxxx
00000120 75 2e 73 65 2c 61 65 73 31 39 32 2d 63 62 63 2c
u.se,aes192-cbc,
00000130 72 69 6a 6e 64 61 65 6c 31 39 32 2d 63 62 63 2c
rijndael192-cbc,
00000140 61 65 73 31 32 38 2d 63 62 63 2c 72 69 6a 6e 64 aes128-
cbc,rijnd
00000150 61 65 6c 31 32 38 2d 63 62 63 2c 62 6c 6f 77 66 ael128-
cbc,blowf
00000160 69 73 68 2d 63 62 63 2c 33 64 65 73 2d 63 62 63 ish-cbc,
3des-cbc
00000170 00 00 00 17 68 6d 61 63 2d 73 68 61 31 2c 68 6d ....hmac-
sha1,hm
00000180 61 63 2d 6d 64 35 2c 6e 6f 6e 65 00 00 00 17 68 ac-
md5,none....h
00000190 6d 61 63 2d 73 68 61 31 2c 68 6d 61 63 2d 6d 64 mac-
sha1,hmac-md
000001a0 35 2c 6e 6f 6e 65 00 00 00 09 6e 6f 6e 65 2c 7a
5,none....none,z
000001b0 6c 69 62 00 00 00 09 6e 6f 6e 65 2c 7a 6c 69 62
lib....none,zlib
000001c0 00 00 00 00 00 00 00 00 00 00 00 00
00 .............
Event Log: Doing Diffie-Hellman key exchange
Outgoing packet type 30 / 0x1e (SSH2_MSG_KEXDH_INIT)
00000000 00 00 00 80 02 1d 65 6d 5d 49 e2 6e d9 f9 2f
36 ......em]I.n../6
00000010 67 7e a7 85 20 66 26 e0 3d a4 3c 2c 1e f6 5e 32 g~..
f&.=.<,..^2
00000020 2f 69 34 6a 89 1f 54 03 2b 36 9b 56 95 ac 9a 03 /i4j..T.
+6.V....
00000030 e3 f6 00 ef b7 15 31 63 c9 88 ac 8b a9 75 1e 44 ......
1c.....u.D
00000040 1c 7a d3 c6 e0 b1 d7 ea bd f5 bd 7d c1 40 c7
7f .z.........}.@..
00000050 80 03 71 dd b6 b1 23 94 9c e5 bf 57 d8 b5 38
32 ..q...#....W..82
00000060 d6 12 d1 65 ba 1d 90 55 a2 48 65 f5 8a 61 b1
3a ...e...U.He..a.:
00000070 10 eb 41 1d eb ae 81 4d 39 8e 50 26 a1 59 9a
3d ..A....M9.P&.Y.=
00000080 44 57 dc 3b DW.;
Incoming packet type 31 / 0x1f (SSH2_MSG_KEXDH_REPLY)
00000000 00 00 00 99 00 00 00 07 73 73 68 2d 72 73 61
00 ........ssh-rsa.
00000010 00 00 03 01 00 01 00 00 00 83 00 8e 9a 4f 73
27 .............Os'
00000020 90 f1 98 15 33 18 2d 59 cb 63 af 4d 87 c3 e5 70 ....3.-
Y.c.M...p
00000030 a6 25 de 6d 5f 97 2a 73 03 15 0f 0f 01 de 48 e1 .
%.m_.*s......H.
00000040 a5 49 a5 fa 8b cd d3 bb 32 9c 03 ff 86 43 b9 7f .I......
2....C..
00000050 bd 0c a5 f5 40 46 22 b8 ce b9 db 25 72 0b 80
f4 ....@F"....%r...
00000060 f2 f4 f6 90 c9 99 04 fb 20 0d 41 e1 49 32 cb
69 ........ .A.I2.i
00000070 18 9a bf b2 54 b1 9f 3a 34 53 05 0d 88 ba a7 87 ....T..:
4S......
00000080 94 18 b3 b6 d5 a6 23 d0 2a b0 75 54 f4 58 6f
40 ......#.*.uT.Xo@
00000090 45 a0 8f 7a f4 3e 84 83 3f df b9 c4 15 00 00 00
E..z.>..?.......
000000a0 81 00 99 28 61 cd 91 29 e5 0d e2 aa 07 14 dd a0 ...
(a..)........
000000b0 a3 3b da 70 b7 a5 d3 5f b6 53 e1 fa 74 94 0c
56 .;.p..._.S..t..V
000000c0 25 29 84 e0 c5 43 d0 ee b3 cc 89 54 e5 2e 70 5e
%)...C.....T..p^
000000d0 35 b7 83 a6 3d 99 8b 28 a1 66 3a 93 f6 06 a4 70 5...=..
(.f:....p
000000e0 64 45 b9 ff 7c a5 52 1e 75 6c d1 83 8b f6 cf 79
dE..|.R.ul.....y
000000f0 7d 72 42 11 e4 19 c8 0d c1 1e fe 26 93 e9 e6
ed }rB........&....
00000100 52 35 77 47 cb fa 7d c0 83 0d 22 8d d1 78 a2 89
R5wG..}..."..x..
00000110 24 70 19 2b d7 07 a8 c7 ca f1 d7 6b 0c ee e6 e8 $p.
+.......k....
00000120 45 b7 00 00 00 91 00 00 00 07 73 73 68 2d 72 73
E.........ssh-rs
00000130 61 00 00 00 82 66 8a 08 8a ce cb f5 ec 15 7f f1
a....f..........
00000140 00 d9 6d be ec a9 de d0 2e b3 7c 1e 8a 8b 27
f3 ..m.......|...'.
00000150 92 d3 37 b9 64 6a 3c 29 9c 8a 94 8e d0 02 68 da ..
7.dj<)......h.
00000160 6c 9e c9 39 54 90 c1 08 56 75 c2 e0 2c fe ab 18 l..
9T...Vu..,...
00000170 7b 37 6e ce e3 54 46 95 af 92 c1 7e 9d f2 94 2e
{7n..TF....~....
00000180 02 4d cd 15 75 c2 55 db 9b c3 1a 10 dd 4b f4
9f .M..u.U......K..
00000190 72 84 59 06 de d9 ec cd 79 4e b2 86 e6 5d 72 04
r.Y.....yN...]r.
000001a0 16 64 60 80 ac 54 ff ce 55 90 36 6d 06 ec 40 8c .d`..T..U.
6m..@.
000001b0 e7 08 d7 e1 75 27 6b ....u'k
Event Log: Host key fingerprint is:
Event Log: ssh-rsa 1040
XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX
Outgoing packet type 21 / 0x15 (SSH2_MSG_NEWKEYS)
Incoming packet type 21 / 0x15 (SSH2_MSG_NEWKEYS)
Event Log: Initialised triple-DES client->server encryption
Event Log: Initialised triple-DES server->client encryption
Event Log: Initialised HMAC-SHA1 client->server MAC algorithm
Event Log: Initialised HMAC-SHA1 server->client MAC algorithm
Outgoing packet type 5 / 0x05 (SSH2_MSG_SERVICE_REQUEST)
00000000 00 00 00 0c 73 73 68 2d 75 73 65 72 61 75 74 68 ....ssh-
userauth
Incoming packet type 6 / 0x06 (SSH2_MSG_SERVICE_ACCEPT)
00000000 00 00 00 0c 73 73 68 2d 75 73 65 72 61 75 74 68 ....ssh-
userauth



=~=~=~=~=~=~=~=~=~=~=~= PuTTY log 2007.04.21 10:18:53
=~=~=~=~=~=~=~=~=~=~=~=
Event Log: Writing new session log (SSH packets mode) to file: T:
\putty-058.log
Event Log: Looking up host "se515.home"
Event Log: Connecting to 192.168.1.1 port 22
Event Log: Server version: SSH-2.0-dropbear_0.36
Event Log: We claim version: SSH-2.0-PuTTY_Release_0.58
Event Log: Using SSH protocol version 2
Incoming packet type 20 / 0x14 (SSH2_MSG_KEXINIT)
00000000 a8 a6 f2 5c 92 66 cb ae 12 d3 60 5a 23 56 36 ed ...
\.f....`Z#V6.
00000010 00 00 00 1a 64 69 66 66 69 65 2d 68 65 6c 6c
6d ....diffie-hellm
00000020 61 6e 2d 67 72 6f 75 70 31 2d 73 68 61 31 00 00 an-group1-
sha1..
00000030 00 07 73 73 68 2d 72 73 61 00 00 00 08 33 64 65 ..ssh-
rsa....3de
00000040 73 2d 63 62 63 00 00 00 08 33 64 65 73 2d 63 62 s-cbc....
3des-cb
00000050 63 00 00 00 12 68 6d 61 63 2d 73 68 61 31 2c 68 c....hmac-
sha1,h
00000060 6d 61 63 2d 6d 64 35 00 00 00 12 68 6d 61 63 2d mac-
md5....hmac-
00000070 73 68 61 31 2c 68 6d 61 63 2d 6d 64 35 00 00 00 sha1,hmac-
md5...
00000080 04 6e 6f 6e 65 00 00 00 04 6e 6f 6e 65 00 00
00 .none....none...
00000090 00 00 00 00 00 00 00 00 00
00 ..........
Outgoing packet type 20 / 0x14 (SSH2_MSG_KEXINIT)
00000000 98 05 4f 15 19 98 83 78 f9 74 c6 59 67 94 c7
e0 ..O....x.t.Yg...
00000010 00 00 00 59 64 69 66 66 69 65 2d 68 65 6c 6c
6d ...Ydiffie-hellm
00000020 61 6e 2d 67 72 6f 75 70 2d 65 78 63 68 61 6e 67 an-group-
exchang
00000030 65 2d 73 68 61 31 2c 64 69 66 66 69 65 2d 68 65 e-
sha1,diffie-he
00000040 6c 6c 6d 61 6e 2d 67 72 6f 75 70 31 34 2d 73 68 llman-
group14-sh
00000050 61 31 2c 64 69 66 66 69 65 2d 68 65 6c 6c 6d 61 a1,diffie-
hellma
00000060 6e 2d 67 72 6f 75 70 31 2d 73 68 61 31 00 00 00 n-group1-
sha1...
00000070 0f 73 73 68 2d 72 73 61 2c 73 73 68 2d 64 73 73 .ssh-
rsa,ssh-dss
00000080 00 00 00 82 61 65 73 32 35 36 2d 63 62 63 2c
72 ....aes256-cbc,r
00000090 69 6a 6e 64 61 65 6c 32 35 36 2d 63 62 63 2c 72
ijndael256-cbc,r
000000a0 69 6a 6e 64 61 65 6c 2d 63 62 63 40 6c 79 73 61 ijndael-
cbc@lysa
000000b0 74 6f 72 2e 6c 69 75 2e 73 65 2c 61 65 73 31 39
tor.liu.se,aes19
000000c0 32 2d 63 62 63 2c 72 69 6a 6e 64 61 65 6c 31 39 2-
cbc,rijndael19
000000d0 32 2d 63 62 63 2c 61 65 73 31 32 38 2d 63 62 63 2-
cbc,aes128-cbc
000000e0 2c 72 69 6a 6e 64 61 65 6c 31 32 38 2d 63 62
63 ,rijndael128-cbc
000000f0 2c 62 6c 6f 77 66 69 73 68 2d 63 62 63 2c 33 64 ,blowfish-
cbc,3d
00000100 65 73 2d 63 62 63 00 00 00 82 61 65 73 32 35 36 es-
cbc....aes256
00000110 2d 63 62 63 2c 72 69 6a 6e 64 61 65 6c 32 35 36 -
cbc,rijndael256
00000120 2d 63 62 63 2c 72 69 6a 6e 64 61 65 6c 2d 63 62 -
cbc,rijndael-cb
00000130 63 40 6c 79 73 61 74 6f 72 2e 6c 69 75 2e 73 65
c@xxxxxxxxxxxxxx
00000140 2c 61 65 73 31 39 32 2d 63 62 63 2c 72 69 6a 6e ,aes192-
cbc,rijn
00000150 64 61 65 6c 31 39 32 2d 63 62 63 2c 61 65 73 31 dael192-
cbc,aes1
00000160 32 38 2d 63 62 63 2c 72 69 6a 6e 64 61 65 6c 31 28-
cbc,rijndael1
00000170 32 38 2d 63 62 63 2c 62 6c 6f 77 66 69 73 68 2d 28-
cbc,blowfish-
00000180 63 62 63 2c 33 64 65 73 2d 63 62 63 00 00 00 17 cbc,3des-
cbc....
00000190 68 6d 61 63 2d 73 68 61 31 2c 68 6d 61 63 2d 6d hmac-
sha1,hmac-m
000001a0 64 35 2c 6e 6f 6e 65 00 00 00 17 68 6d 61 63 2d
d5,none....hmac-
000001b0 73 68 61 31 2c 68 6d 61 63 2d 6d 64 35 2c 6e 6f sha1,hmac-
md5,no
000001c0 6e 65 00 00 00 09 6e 6f 6e 65 2c 7a 6c 69 62 00
ne....none,zlib.
000001d0 00 00 09 6e 6f 6e 65 2c 7a 6c 69 62 00 00 00
00 ...none,zlib....
000001e0 00 00 00 00 00 00 00 00 00 .........
Event Log: Using Diffie-Hellman with standard group "group1"
Event Log: Doing Diffie-Hellman key exchange
Outgoing packet type 30 / 0x1e (SSH2_MSG_KEXDH_INIT)
00000000 00 00 00 81 00 91 5a 23 c4 c9 0b b6 85 ae e1
3d ......Z#.......=
00000010 e4 37 b5 bf 58 51 fc d9 71 b0 0f 61 e4 6a 8d 94 .
7..XQ..q..a.j..
00000020 50 e3 e7 e2 f8 57 ae 23 d0 fc 66 4f 40 1b 85 17
P....W.#..fO@...
00000030 53 78 29 15 95 35 e8 c7 09 41 35 e8 bc b7 ca 92 Sx)..
5...A5.....
00000040 58 25 9c 1e df c6 20 05 10 12 f7 7d 16 d7 eb b7 X
%.... ....}....
00000050 31 34 92 11 03 a2 66 fe 0b 94 e1 50 26 c5 5c 78
14....f....P&.\x
00000060 4b 0f 7e 45 fc ac 2c 91 99 e4 ee f2 82 31 22 77
K.~E..,......1"w
00000070 e4 28 ff 7f 9d 32 21 85 76 ad 9f e9 b0 e5 10 35 .(...
2!.v......5
00000080 77 7d c5 e0 f1 w}...
Event Log: Network error: Connection reset by peer

.

Relevant Pages

  • Re: tightvnc & ssh
    ... > I can ssh to my mandrake box. ... I got a connection error (I forget the exact error ... Which seems to mean that I can't just use tightvnc on the windows ... There is a product called putty. ...
    (comp.os.linux.networking)
  • SSH with OpenSSH and Putty - Please Help!
    ... I deleted all my keys on the server and locally. ... Pagent and then I tried to connect via Putty and I got the same thing. ... Event Log: Appending session log (SSH packets mode) to file: putty.log ...
    (SSH)
  • Using Putty for the SSH tunnel AND the telnet program
    ... I've successfully configured putty to connect to the SSH ... tunnel, forward the telnet traffic, and use our client telnet program ... I realize that Putty is just trying to make the SSH connection, ...
    (comp.security.ssh)
  • ssh is not setting DISPLAY
    ... setting the DISPLAY variable on my home machine, so X forwarding ... There's a third Linux box that I can connect to from work via PuTTY, ... tried to replicate everything in this working connection, ... I've read the man page for ssh, but it looks like I'm doing everything ...
    (comp.security.ssh)
  • Re: Web-based remoting...
    ... I'm posting this from my home machine at the moment using Putty, ssh ... can be a little slow on a cheap ADSL connection with modern more ... Using ssh and tunnels you restrict the entry points to your system to ...
    (alt.os.linux.suse)