連続でscp転送すると必ず1013個目でハングアップします。

長すぎて質問本文の中に書けなかったことを補足します。

・ハングアップした時の scp -v で出たログは以下の通りです。SSH2_MSG_SERVICE_ACCEPT receivedで止まってしまっているようです。

$ scp -v -P (port) (user)@(domain):(remote path) (local path)

Executing: program /usr/bin/ssh host xxx.xxx, user xxx, command scp -v -f (local path)

OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008

debug1: Reading configuration data /etc/ssh/ssh_config

debug1: Applying options for *

debug1: Connecting to xxx.xxx [xxx.xxx.xxx.xxx] port xxxxx.

debug1: Connection established.

debug1: identity file /home/xxx/.ssh/identity type -1

debug1: identity file /home/xxx/.ssh/id_rsa type -1

debug1: identity file /home/xxx/.ssh/id_dsa type 2

debug1: loaded 3 keys

debug1: Remote protocol version 1.99, 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_4.3

debug1: SSH2_MSG_KEXINIT sent

debug1: SSH2_MSG_KEXINIT received

debug1: kex: server->client aes128-ctr hmac-md5 none

debug1: kex: client->server aes128-ctr hmac-md5 none

debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent

debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP

debug1: SSH2_MSG_KEX_DH_GEX_INIT sent

debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY

debug1: Host 'xxx.xxx.xxx' is known and matches the RSA host key.

debug1: Found key in /home/xxx/.ssh/known_hosts:1

debug1: ssh_rsa_verify: signature correct

debug1: SSH2_MSG_NEWKEYS sent

debug1: expecting SSH2_MSG_NEWKEYS

debug1: SSH2_MSG_NEWKEYS received

debug1: SSH2_MSG_SERVICE_REQUEST sent

debug1: SSH2_MSG_SERVICE_ACCEPT received