8 CFR 214.3中提到:
Failure of a school to receive SEVP notices due to inaccurate DSO e-mail addresses in SEVIS or blockages of the school's e-mail system caused by spam filters is not grounds for appeal of a denial or withdrawal.
写这个CFR的有高人啊,这么宅的角度都给堵上了。 #论为什么需要一个自己能控制的邮件系统
Failure of a school to receive SEVP notices due to inaccurate DSO e-mail addresses in SEVIS or blockages of the school's e-mail system caused by spam filters is not grounds for appeal of a denial or withdrawal.
写这个CFR的有高人啊,这么宅的角度都给堵上了。 #论为什么需要一个自己能控制的邮件系统
差点就顺手把某大唱片公司的YouTube频道给当作盗版商给举报了,还好在操作前先咨询了一下专业人士😢
花了20分钟尝试解决一个路由问题,最后发现是对RFC 3927的理解不深导致的,十五年前的设计中采用的RFC 1918编址其实才是比较正经的解法,盲目跟风采用RFC 3927地址的问题在于这些地址是链路本地(link-local)的,by definition这些地址就不应该路由所以直接在路由代码里就drop掉了,听包听了个寂寞的李先生丢开了tcpdump开始了grep,然后惊喜地发现这段代码是这么写的:
#define IN_LINKLOCAL(i) (((in_addr_t)(i) & 0xffff0000) == 0xa9fe0000)
嗯,a9fe,这个就有点巧妙了。您也别管grep找不找得到,您就说这写法是不是能把事儿给办了吧。
所以接下来的解决方案有:a)维持大致上两个站点采用星形拓扑,但将两站间共享服务放回RFC 1918内网上,b)改采网状拓扑,在几台机器之间直接拉一组N对N的网状VPN链接
然后再把OSPF跑起来。
个人倾向于a,主要原因是本来这边的网络也是星形结构,最终这些端到端的VPN链接并不真的改善可靠性。转了一圈又回到了原点(只是这次搬家的副作用是内网变成/32而不是/23了
,考虑到这个做法其实更方便跨机房搬家我打算以后就这么干了)
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https://www.britishmuseum.org/collection/object/W_1953-0411-71 原来「收到的铜品质不对,于是愤怒地花了几个小时刻泥板来抱怨」的文物是真的… #TIL
The British Museum
tablet | British Museum
Clay tablet; letter from Nanni to Ea-nasir complaining that the wrong grade of copper ore has been delivered after a gulf voyage and about misdirection and delay of a further delivery; slightly damaged; 23 + 25 + 3 + 2 ll.
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