作者hungwei0331 (Game)
看板Linux
标题[问题] dropbear加入安全机制
时间Fri Feb 6 16:56:13 2015
各位版上前辈好,
我想用dropbear加入以下功能,
连续三次登入未能成功则阻挡该IP 30分钟,
目前已下载dropbear souce code更改,
更改svr-auth.c与svr-main.c
svr-auth更改如下
if (ses.authstate.failcount >= MAX_AUTH_TRIES) {
char * userstr;
/* XXX - send disconnect ? */
TRACE(("Max auth tries reached, exiting"))
if (ses.authstate.pw_name == NULL) {
userstr = "is invalid";
} else {
userstr = ses.authstate.pw_name;
}
dropbear_exit("Max auth tries reached - user '%s' from %s",
userstr, svr_ses.addrstring);
}
svr-main.c更改如下
/* child */
#ifdef DEBUG_FORKGPROF
extern void _start(void), etext(void);
monstartup((u_long)&_start, (u_long)&etext);
#endif /* DEBUG_FORKGPROF */
getaddrstring(&remoteaddr, NULL, &remote_port, 0);
dropbear_log(LOG_INFO, "Child connection from %s:%s",
remote_host, remote_port);
///Ignore connection here for 30 mins if you found 3 times login failure
m_free(remote_host);
m_free(remote_port);
#ifndef DEBUG_NOFORK
if (setsid() < 0) {
dropbear_exit("setsid: %s", strerror(errno));
}
#endif
/* make sure we close sockets */
for (i = 0; i < listensockcount; i++) {
m_close(listensocks[i]);
}
m_close(childpipe[0]);
/* start the session */
svr_session(childsock, childpipe[1]);
/* don't return */
dropbear_assert(0);
}
以上compile过後都未能新增这功能,
stack overflow则是有建议安装fail2ban,
但我在openwrt底下这套软体太过肥大暂不考虑
想请教版上前辈是否能指点我哪里更改错误呢? 请多多指教 谢谢
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1F：推 hizuki: 你没把ip存起来当然不行 02/06 19:46
2F：→ hizuki: 建list存ip和时间，每次检查才行，很麻烦 02/06 19:47
3F：→ jokester: dropbear可以连结fail2ban 02/11 15:05
4F：→ jokester: 眼残抱歉.. 02/11 15:05